Publications

Here are all publications of µKI Group. Publications from both the former Interface and YKI groups are included.

Publications

  • Reivinen, M., Salonen, E.M., Todoshchenko, I. and Vaskelainen, V.P., "An Enhanced Facet Determination Scheme in 3D", Journal of Low Temperature Physics, 186, 63-73 (2018). [DOI]
  • Todoshchenko, I., Savin, A., Haataja, M., Kaikkonen, J.-P., and Hakonen, P.J., "Quartz tuning fork as a probe of surface oscillations", Applied Physics Letters, 110, 071601 (2017). [DOI]

  • Manninen, M.S., Ranni, A., Rysti, J., Todoshchenko I.A., and Tuoriniemi J.T., "Surface waves on the superfluids 3He and 4He", Journal of Low Temperature Physics, 183, 399–415 (2016). [DOI]

  • Todoshchenko, I., "Massless surface waves between two different superfluid phases of 3He", Physical Review B, 93, 134509 (2016). [DOI]

  • Tuoriniemi, J., "Physics at its coolest", Nature Physics, 12, 11-14 (2016). [DOI]

  • Reivinen, M., Salonen, E.-M., Todoshchenko, I., and Vaskelainen, V.P., "Equilibrium Crystal Shapes by Virtual Work in 3D", Journal of Low Temperature Physics, 180, 394-415 (2015). [DOI]

  • Manninen, M., [Thesis] Oscillations on helium surfaces, Aalto University, School of Science, Department of Applied Physics (2015). [URL]

  • Tuoriniemi, J.T., Manninen, M.S., and Rysti, J., "Pressure dependent attenuation peaks for quartz tuning forks in superfluid 4He at mK temperatures ", Journal of Physics: Conference Series, 568, 012023 (2014). [DOI]

  • Manninen, M.S., Rysti, J., Todoshchenko, I., and Tuoriniemi, J., "Quasiparticle damping of surface waves in superfluid 3He and 4He", Physical Review B, 90, 224502 (2014). [DOI]

  • Rysti, J. and Tuoriniemi, J., "Quartz Tuning Forks and Acoustic Phenomena: Application to Superfluid Helium", Journal of Low Temperature Physics, 177, 3-4133-150 (2014). [DOI]

  • Todoshchenko, I., Kaikkonen, J.-P., Blaauwgeers, R., Hakonen, P. J., and Savin, A., "Dry demagnetization cryostat for sub-millikelvin helium experiments: Refrigeration and thermometry", Review of Scientific Instruments, 85, 085106 (2014). [DOI]

  • Rysti, J., Manninen, M. S., and Tuoriniemi, J., "Measurements on melting pressure, metastable solid phases, and molar volume of univariant saturated Helium mixture", Journal of Low Temperature Physics, 175, 739-754 (2014). [DOI]

  • Ahlstrom, S.L., Bradley, D.I., Clovecko, M., Fisher, S.N., Guénault, A.M., Guise, E.A., Haley, R.P., Kolosov, O., Kumar , M., McClintock, P.V.E., Pickett, G.R., Polturak, E., Poole , M., Todoshchenko, I., Tsepelin, V., Woods, A.J., "Response of a Mechanical Oscillator in Solid 4He", Journal of Low Temperature Physics, 175, 140-146 (2014). [DOI]

  • Ahlstrom, S. L., Bradley, D. I., Človečko, M., Fisher, S. N., Guénault, A. M., Guise, E.A., Haley, R.P., Kumar, M., McClintock, P.V.E., Pickett, G.R., Polturak, E., Poole, M., Todoshchenko, I., Tsepelin, V., and Woods, A.J., "Plastic Properties of Solid 4He Probed by a Moving Wire: Viscoelastic and Stochastic Behavior Under High Stress", Journal of Low Temperature Physics, 175, 147-153 (2014). [DOI]

  • Manninen, M.S., Kaikkonen, J.-P., Peri, V., Rysti, J., Todoshchenko, I., Tuoriniemi, J., "Excitation and Detection of Surface Waves on Normal and Superfluid 3He", Journal of Low Temperature Physics, 175, 56-62 (2014). [DOI]

  • Todoshchenko, I., "Crystallization waves (In memory of Alexander Parshin). (JETP Letters, February 2014, Vol 98, Issue 12, pp. 863-867)", Pis´ma v ZhETF, 98, 967 (2013). [DOI]

  • Rysti, J., [Thesis] Microscopic and Macroscopic Studies of Liquid and Solid Helium Mixtures, Aalto University, School of Science, O.V. Lounasmaa Laboratory (2013). [URL]

  • Rysti, J. and Tuoriniemi, J., "Mechanical Oscillators in Inviscid Compressible Fluids", Journal of Low Temperature Physics, 171, 273-279 (2013). [DOI]

  • Reivinen, M., Salonen, E.-M., Todoshchenko, I., and Vaskelainen, V.P., "Equilibrium crystal shapes by virtual work", Journal of Low Temperature Physics, 170, 75-90 (2013). [DOI]

  • Tuoriniemi, J., Rysti, J., Salmela, A., and Manninen, M., "Mode analysis for a quartz tuning fork coupled to acoustic resonances of fluid in a cylindrical cavity", Journal of Physics: Conference Series, 400, 012077 (2012). [URL]

  • Rysti, J., Tuoriniemi, J., Salmela, A., and Sebedash, A., "Melting pressure of saturated helium mixture at temperatures between 10 mK and 0.5 K", Journal of Physics: Conference Series, 400, 012065 (2012). [URL]

  • Rysti, J., Tuoriniemi, J., Salmela, A., "Effective 3He interactions in dilute 3He-4He mixtures", Physical Review B, 85, 134529/1-8 (2012). [DOI]

  • Salmela, A., [Thesis] Experimental studies on dilute helium mixtures at low temperatures, Aalto University, School of Science, O.V. Lounasmaa Laboratory (2012). [URL]

  • Pentti, E., Rysti, J., Salmela, A., Sebedash, A., and Tuoriniemi, J., "Studies on Helium Liquids by Vibrating Wires and Quartz Tuning Forks", Journal of Low Temperature Physics, 165, 132-165 (2011). [DOI]

  • Todoshchenko, I.A. Manninen, M.S., and Parshin, A. Ya., "Anisotropy of c facets of 4He crystal", Physical Review B, 84, 075132 (2011). [DOI]

  • Salmela A., Sebedash A., Rysti J., Pentti E., Tuoriniemi J., "Osmotic pressure of He-3/He-4 mixtures at the crystallization pressure and at millikelvin temperatures", Physical Review B, 83, 134510/1-8 (2011). [DOI]

  • Rysti, J., Tuoriniemi, J., Sebedash, A., Salmela, A., "Search for Superfluidity in 3He-4He Mixtures", Proceedings of the XLV Annual Conference of the Finnish Physical Society and the Second Nordic Physics Meeting, 84 (2011).

  • Salmela, A., Tuoriniemi, J., and Rysti, J., "Acoustic Resonances in Helium Fluids Excited by Quartz Tuning Forks ", Journal of Low Temperature Physics, 162, 678-685 (2011). [DOI]

  • Sebedash, A., Tuoriniemi, J., Pentti, E., and Salmela, A., "Improved capacitive melting curve measurements", Journal of Physics: Conference Series, 150, 012043 (2009). [DOI]

  • Tuoriniemi, J., "Nuclear ordering and superconductivity in lithium", Journal of Physics: Conference Series, 150, 042222 (2009). [DOI]

  • Salmela, A., Tuoriniemi, J., Pentti, E., Sebedash, A., and Rysti, J., "Acoustic resonator providing fixed points of temperature between 0.1 and 2 K", Journal of Physics: Conference Series, 150 (2009).

  • Manninen, M.S., Junes, H.J., Kaikkonen, J.P., Parshin, A.Ya., Todoshchenko, I.A., and Tsepelin, V., "Experimental setup for the observation of crystallization waves in 3He ", Journal of Physics: Conference Series, 150 (2009). [DOI]

  • Todoshchenko, I.A., Alles, H., Junes, H.J., Manninen, M.S., and Parshin, A.Ya., "Nuclear Spin Ordering on the Surface of a 3He Crystal: Magnetic Steps", Physical Review Letters, 102, 245302 (2009). [DOI]

  • Pentti, E., [Thesis] Dilute helium mixtures at low temperatures: properties and cooling methods, (2009). [URL]

  • Pentti, E., Rysti, J., Salmela, A., Sebedash, A., and Tuoriniemi, J., "Studies on helium liquids by vibrating wires and quartz tuning forks", Low Temperature Laboratory Publications, 1-36 (2009).

  • Junes, H., [Thesis] Experiments on the faceting and supersolidity in helium crystals, Low Temperature Laboratory (2009). [URL]

  • Salmela, A., Sebedash, A., Rysti, J., Pentti, E., and Tuoriniemi, J., "Osmotic Pressure of 3He-4He Mixtures at 2.53 MPa Pressure and at Millikelvin Temperatures", Proceedings of the XLIII Annual Conference of the Finnish Physical Society, 72 (2009).

  • Rysti, J. and Tuoriniemi, J., "Interactions in Dilute 3He-4He Mixtures", Proceedings of the XLIII Annual Conference of the Finnish Physical Society, 33 (2009).

  • Rysti, J., Tuoriniemi, J., Sebedash, A., Pentti, E., and Salmela, A., "Dilute 3He-4He Mixtures at Low Temperatures", Proceedings of the XLII Annual Conference of the Finnish Physical Society, 212 (2008).

  • Todoshchenko, I.A., Alles, A., Junes, H.J., Manninen, M.S., and Parshin, A.Ya., "Devil's staircase of facets on the surface of 4He crystals", Physical Review Letters, 101, 255302/1-4 (2008). [DOI]

  • Junes, H.J., Alles, H., Manninen, M.S., Parshin, A.Y., and Todoshchenko, I.A., "Stacking fault energy in 4He crystals", Journal of Low Temperature Physics, 153, 244-249 (2008). [DOI]

  • Pentti, E.M., Tuoriniemi, J.T., Salmela, A.J., and Sebedash, A.P., "Solubility of 3He in 4He at millikelvin temperatures up to the melting pressure measured by a quartz tuning fork", Physical Review B, 78, 064509/1- (2008). [DOI]

  • Alles, H., "Ülivoolav tahke heelium?", Eesti Füüsika Seltsi Aastramat 2007, 76-84 (2008).

  • Todoshchenko, I.A., Alles, H., Junes, H.J., Manninen, M.S., Parshin, A.Ya., and Tsepelin, V., "Elementary Excitations in Solid and Liquid 4He at the Melting Pressure", Journal of Low Temperature Physics, 150, 258-266 (2008). [DOI]

  • Sebedash, A.P., Tuoriniemi, J.T., Pentti, E.M., and Salmela, A., "Osmotic pressure of 3He-4He solutions at 25.3~bar and Low Temperatures", Journal of Low Temperature Physics, 150, 181-186 (2008).

  • Pentti, E.M., Tuoriniemi, J.T., Salmela, A.J., and Sebedash, A.P., "Quartz tuning fork in Helium", Journal of Low Temperature Physics, 150, 555-560 (2008). [DOI]

  • Todoshchenko, I.A., Alles, H., Junes, H., Parshin, A.Y., and Tsepelin, V., "Growth dynamics and faceting of 3He crystals", Journal of Low Temperature Physics, 148, 635-643 (2007). [DOI]

  • Sebedash, A.P., Tuoriniemi, J.T., Boldarev, S.T., Pentti, E.M.M., and Salmela, A.J., "Adiabatic melting of 4He crystal in superfluid 3He at sub-millikelvin temperatures", Journal of Low Temperature Physics, 148, 725-729 (2007). [DOI]

  • Todoshchenko, I.A., Alles, H., Junes, H.J., Parshin, A.Ya. and Tsepelin, V., "Absence of low temperature anomaly on the melting curve of 4He", Pis´ma v ZhETF, 85, 555-558 (2007). [DOI]

  • Tuoriniemi, J., Juntunen-Nurmilaukas, K., Uusvuori, J., Pentti, E., Salmela, A., and Sebedash, A., "Superconductivity in lithium below 0.4 millikelvin at ambient pressure", Nature, 447, 187-189 (2007). [DOI]

  • Alles, H., "Ülivoolav tahke heelium (Supersolid helium)", Eesti Füüsika Seltsi Aastramaat 2006, 66 (2007).

  • Tuoriniemi, J., Sebedash, A., Boldarev, S., Pentti, E., Salmela, A., and Rysti, J., "Adiabatic melting of 4he crystal to superfluid 3He: Progress of the experiment", Proceedings of the XLI Annual Conference of the Finnish Physical Society, 268 (2007).

  • Alles, H., Bueno, J., Junes, H.J., Parshin, A.Ya., Todoshchenko, I., and Tsepelin, V., "Melting curve of helium-4: No sign of a supersolid transition down to 0.01 K", Proceedings of the XLI Annual Conference of the Finnish Physical Society, 38 (2007).

  • Tuoriniemi, J., "Superconductivity in Lithium", Proceedings of the XLI Annual Conference of the Finnish Physical Society, 12 (2007).

  • Pentti, E., Tuoriniemi, J., Salmela, A., and Sebedash, A., "Melting pressure thermometry of the saturated helium mixture at millikelvin temperatures", Journal of Low Temperature Physics, 146, 71-83 (2007).

  • Junes, H., Alles, H., Parshin, A.Ya., Todoshchenko, I.A., and Tsepelin, V., "First observation of the critical size of facets on 3He crystals near 1mK", Journal of Low Temperature Physics, 146, 85-93 (2007). [DOI]

  • Sebedash, A., Tuoriniemi, J.T., Boldarev, S., Pentti, E.M., and Salmela, A.J., "Melting pressure thermometry for dilute 3He-4He mixtures", AIP Conference Proceedings, 850, 1591-1592 (2006).

  • Tuoriniemi, J.T. and Juntunen, K.I., "NMR response of highly polarized and magnetically ordered nuclei in lithium metal down to nanokelvin temperatures", AIP Conference Proceedings, 850, 1295-1296 (2006).

  • Todoshchenko, I.A., Alles, H., Junes, H.J., and Parshin, A.Ya., "On the growth dynamics of 4He crystals near the first roughening transition", AIP Conference Proceedings, 850, 337-338 (2006). [DOI]

  • Todoshchenko, I.A., Alles, H., Bueno, J., Junes, H.J., Parshin, A.Ya., and Tsepelin, V., "Melting curve of 4He: No sign of a supersolid transition down to 10 mK", Physical Review Letters, 97, 165302/1-4 (2006). [DOI]

  • Alles, H., "Külmalabor kui Suure Paugu katsepolügoon", Horisont, 32-38 (2006).

  • Junes, H.J., Alles, H., Parshin, A.Ya., Todoshchenko, I.A., and Tsepelin, V., "Measurements of the step energy on melting 3He crystals around 1 mK", Proceedings of the XL Annual Conference of the Finnish Physical Society, 33 (2006).

  • Sebedash, A., Tuoriniemi, J.T., Boldarev, S., Pentti, E.M., and Salmela, A., "Cooling of dilute 3He-4He mixtures by adiabatic melting of 4He at submillikelvin temperatures", Proceedings of the XL Annual Conference of the Finnish Physical Society, 32 (2006).

  • Salmela, A., Pentti, E., Sebedash, A., and Tuoriniemi, J., "Thermometry for a 3He/4He adiabatic melting experiment", Proceedings of the XXXIX Annual Conference of the Finnish Physical Society, 23 (2005).

  • Juntunen, K.I. and Tuoriniemi, J.T., "Experiment on nuclear ordering and superconductivity in lithium", Journal of Low Temperature Physics, 141, 235-293 (2005). [DOI]

  • Balibar, S., Alles, H., and Parshin, A., "The surface of helium crystals", Reviews of Modern Physics, 77, 317-370 (2005). [DOI]

  • Todoshchenko, I., Alles, H., Junes, H., Parshin, A., and Tsepelin, V., "Measurements on the surface tension of 3He crystals near 100 mK", Journal of Low Temperature Physics, 138, 811-816 (2005). [DOI]

  • Juntunen, K.I., and Tuoriniemi, J.T., "NMR spectra of highly polarized lithium", Journal of Low Temperature Physics, 138, 759-764 (2005).

  • Alles, H., "Need imepärased heeliumikristallid", Horisont, 24-27 (2005).

  • Juntunen, K., [Thesis] Nuclear magnetism and superconductivity: Investigations on lithium and rhodium, Low Temperature Laboratory (2005). [URL]

  • Todoshchenko, I.A., Alles, H., Junes, H.J., Parshin, A.Ya., and Tsepelin, V., "Surface of a 3He crystal: Crossover from quantum to classical behavior", Physical Review Letters, 93, 175301/1-4 (2004). [DOI]

  • Juntunen, K.I., and Tuoriniemi, J.T., "Nuclear ordering in lithium and an upper limit on its ambient pressure superconducting transition temperatures", Physical Review Letters, 93, 157201/1-4 (2004). [DOI]

  • Juntunen, K.I., and Tuorinimi, J.T., "Experiment on nuclear ordering and superconductivity in lithium", Low Temperature Laboratory Publications, 1-52 (2004).

  • Alles, H., and Parshin, A.Ya., "Optical imaging of helium interfaces", Journal of Low Temperature Physics, 135, 665-694 (2004). [URL]

  • Tuoriniemi, J., and Juntunen, K., "Nuclei in cooperation", Journal of Low Temperature Physics, 135, 513-543 (2004). [URL]

  • Alles, Harry, "Maailmaruumi külmim koht asub meie külje all", Horisont, 10-13 (2004).

  • Tuoriniemi, J., "Matalimmat lämpötilat - miksi ja miten ", Tietoyhteys, Joulukuu, 32-33 (2003).

  • Tuoriniemi, J., Juntunen, K., and Uusvuori, J., "Thermal contact to lithium metal", Physica B, 329-333, 1294-1295 (2003).

  • Todoshchenko, I.A., Alles, H., Junes, H.J., Parshin, A.Ya., Tsepelin, V., "Faceting of 3He crystals", Physica B, 329-333, 386-387 (2003). [DOI]

  • Alles, H., Babkin, A., Jochemsen, R., Parshin, A.Ya., Todoshchenko, I.A., and Tsepelin, V., "Faceting and growth kinetics of 3He crystals", Physica B, 329-333, 360-363 (2003). [URL]

  • Martikainen, J., Tuoriniemi, J., Pentti, E., and Pickett, G., "Vibrating wire measurements in dilute 3He-4He solutions at ballistic quasiparticle regime", Physica B, 329-333, 178-179 (2003). [URL]

  • Tuoriniemi, J., Martikainen, J., Pentti, E., Sebedash, A., Boldarev, S., and Picket, G., "Towards superfluidity of 3He diluted by 4He", Journal of Low Temperature Physics, 129, 531-545 (2002). [DOI]

  • Tsepelin, V., Alles, H., Babkin, A., Jochemsen, R., Parshin, A.Ya., and Todoshchenko, I., "Morphology and growth kinetics of 3He crystals below 1 mK", Journal of Low Temperature Physics, 129, 489-530 (2002).

  • Todoschenko, I., Alles, H., Babkin, A., Parshin, A.Ya., and Tsepelin, V., "Vibrating wire measurements in superfluid 3He at the melting curve down to 0.53 mK", Journal of Low Temperature Physics, 126, 1449-1455 (2002).

  • Alles, H., Babkin, A., Jochemsen, R., Parshin, A.Ya., Todoschenko, I.A., and Tsepelin, V., "Faceting on 3He crystals", Proceedings of the National Academy of Sciences of the United States of America (PNAS), 99, 1796-1800 (2002).

  • Martikainen, J., Tuoriniemi, J., Knuuttila, T., and Pickett, G., "Vibrating wire measurements in 3He-4He mixtures in the ballistic quasiparticle regime", Journal of Low Temperature Physics, 126, 139-144 (2002).

  • Tsepelin, V., Alles, H., Babkin, A., Jochemsen, R., Parshin, A.Ya., and Todoshchenko, I.A., "Anisotropy of growth kinetics of 3He crystal below 1 mK", Physical Review Letters, 88, 045302-1/4 (2002). [DOI]

  • Alles, H., Tsepelin, V., Babkin, A., Jochemsen, R., Parshin, A.Ya., and Todoschenko, I., "Observations on faceting of 3He crystals at T = 0.55 mK", Journal of Low Temperature Physics, 124, 189-196 (2001).

  • Tsepelin, V., [Thesis] Investigations of solid-liquid interfaces in helium at ultralow temperatures, Low Temperature Laboratory (2001). [URL]

  • Juntunen, K.I., Lefmann, K., Knuuttila, T.A., and Tuoriniemi, J.T., "High temperature expansion and exact diagonalization of the rhodium nuclear spin system compared to experimental results", Journal of Low Temperature Physics, 124, 271-289 (2001).

  • Martikainen, J., and Tuoriniemi, J.T., "SQUID amplifier system for vibrating wire resonators", Journal of Low Temperature Physics, 124, 367-382 (2001).

  • Knuuttila, T.A., Tuoriniemi, J.T., Lefmann, K., Juntunen, K.I., Rasmussen, F.B., and Nummila, K.K., "Polarized nuclei in normal and superconducting rhodium", Journal of Low Temperature Physics, 123, 65-102 (2001).

  • Tsepelin, V., Alles, H., Babkin, A., Jochemsen, R., Parshin, A.Ya., Todoschenko, I., and Tvalashvili, G., "Morphology and growth kinetics of 3He crystals below 1 mK", HUT REPORTS, 1-31 (2001).

  • Lefmann, K., Knuuttila, T.A., Martikainen, J.E., Kuhn, L.T., and Nummila, K.K., "Effect of heat treatment of pure and carbon-polluted rhodium samples on the low-temperature resistivity", Journal of Materials Science, 36, 839-844 (2001).

  • Tsepelin, V., Alles, H., Babkin, A., Härme, J.P.H., Jochemsen, R., Parshin, A.Ya., and Tvalashvili, G., "Observation of higher order facets on 3He crystals", Physical Review Letters, 86, 1042-1045 (2001). [DOI]

  • Tsepelin, V., Alles, H., Babkin, A., Härme, J:P:H., Jochemsen, R., Parshin, A.Ya., and Tvalashvili, G., "Direct observation of (110) (100) and (211) facets on 3He crystals", Journal of Low Temperature Physics, 121, 695-700 (2000).

  • Ishii, H., and Hakonen, P., "Nuclear spin relaxation at ultralow temperatures", Physica B, 284-288, 1706-1707 (2000). [URL]

  • Knuuttila, T., [Thesis] Nuclear magnetism and superconductivity in rhodium, Low Temperature Laboratory (2000). [URL]

  • Knuuttila, T.A., Tuoriniemi, J.T., and Lefmann, K., "Relaxation of polarized nuclei in superconducting rhodium", Physical Review Letters, 85, 2573-2576 (2000). [DOI]

  • Knuuttila, T.A., Tuoriniemi, J.T., Lefmann, K., Juntunen, K.I., Rasmussen, F.B., and Nummila, K.K., "Polarized nuclei in normal and superconducting rhodium", HUT REPORTS, TKK-KYL-002, 40 (2000).

  • Knuuttila, T., Martikainen, J., Rasmussen, F., and Tuoriniemi, J., "Double-spin-flip mode of rhodium nuclei", Physica B, 284-288, 1700-1701 (2000). [URL]

  • Härme, J.P.H., Alles, H., Babkin, A., Jochemsen, R., Parshin, A.Ya., Tsepelin, V., and Tvalashvili, G., "Optical observation of 3He crystal at mK-temperatures", Physica B, 284-288, 349-350 (2000). [URL]

  • Tsepelin, V., Alles, H., Babkin, A., Härme, J.P.H., Jochemsen, R., Parshin, A.Ya., and Tvalashvili, G., "Nucleation and growth of 3He crystals below 1 mK", Physica B, 284-288, 351-352 (2000). [URL]

  • Tuoriniemi, J.T., and Knuuttila, T.A., "Nuclear cooling and spin properties of rhodium down to picokelvin temperatures", Physica B, 280, 474-478 (2000). [URL]

  • Niemetz, M., Schoepe, W., Simola, J.T., and Tuoriniemi, J.T., "The oscillating magnetic microsphere: a tool for investigating vorticity in superconductors and superfluids", Physica B, 280, 559-560 (2000). [URL]

  • Luusalo, R., Husmann, A., Kopu, J., and Hakonen, P.J., "Pseudo-contact angle due to superfluid vortices in 4He", Europhysics Letters, 50, 222-228 (2000).

  • Tuoriniemi, J.T., Knuuttila, T.A., Lefmann, K., Nummila, K.K., and Yao, W., "Double-spin-flip resonance of rhodium nuclei at positive and negative spin temperatures", Physical Review Letters, 84, 370-373 (2000). [DOI]

  • Tsepelin, V., Saramäki, J.P., Babkin, A.V., Hakonen, P.J., Hyvönen, J.J., Luusalo, R.M., Parshin, A.Ya., and Tvalashvili, G.K., "Elementary steps on the 4He crystal interface probed by 3He atoms", Physical Review Letters, 83, 4804-4807 (1999). [DOI]

  • Ishii, H., and Hakonen, P.J., "Nuclear spin relaxation at ultralow temperatures", Physical Review B, 59, 9462-9466 (1999). [DOI]

  • Saramäki, J., [Thesis] High precision experiments on solid/superfluid 4He interface at mK-temperatures, Low Temperature Laboratory (1998).

  • Siemensmeyer, K., Clausen, K.N., Lefmann, K., Lounasmaa, O.V., Metz, A., Nummila, K.K., Rasmussen, F.B., Steiner, M., Tuoriniemi, J.J.T., and Vuorinen, R.T., "Neutron studies of nuclear magnetism at ultralow temperature", Physica B, 506-510 (1998).

  • Saramäki, J.P., Tsepelin, V., Babkin, A.V., Hakonen, P.J., Husmann, A., Hyvönen, J.J., Luusalo, R.M., and Parshin, A.Ya., "Facet growth and step structure of 4He crystals at mK-temperatures", HUT REPORTS, 30 (1998).

  • Saramäki, J.P., Tsepelin, V., Babkin, A.V., Hakonen, P.J., Hyvönen, J.J., Luusalo, R.M., Parshin, A.Ya., and Tvalashvili, G., "Probing the fine structure of the 4He crystal interface by 3He atoms", HUT REPORTS, 7 (1998).

  • Ruutu, J.P., Hakonen, P.J., Babkin, A.V., Parshin, A.Ya., and Tvalashvili, G., "Growth of 4He-crystals at mK-temperatures", Journal of Low Temperature Physics, 112, 117-164 (1998).

  • Knuuttila, T.A., Nummila, K.K., Yao, W., Kauppinen, J.P., and Pekola, J.P., "Direct measurements of electron thermalization in Coulomb blockade nanothermometers at millikelvin temperatures", Physica E, 3, 224-228 (1998).

  • Saramäki, J.P., Babkin, A.V., Hakonen, P.J., Luusalo, R.M., and Parshin, A.Ya., "Do dislocation loops destroy facet flatness?", Journal of Low Temperature Physics, 110, 141-146 (1998).

  • Lounasmaa, O.V., "Nuclear magnetism in copper, silver, and rhodium metals at positive and negative spin temperatures in the nano- and picokelvin regimes", Magnetism in Metals, A symposium in Memory of Allan Mackintosh, 45, 401 - 443 (1997).

  • Yao, W., [Thesis] A Versatile Nuclear Demagnetization Cryostat for Ultralow Temperature Research, Low Temperature Laboratory (1997).

  • Lefmann, K., Tuoriniemi, J.T., Nummila, K.K., and Metz, A., "Neutron thermometry on polarized silver nuclei at sub-microkelvin spin temperatures", Zeitschrift für Physik B - Condensed Matter, 102, 439-447 (1997).

  • Tuoriniemi, J.T., Nummila, K.K., Lefmann, K., Vuorinen, R.T., and Metz, A., "Neutron thermometry applied to magnetization and spin-lattice relaxation measurements on silver nuclei", Zeitschrift für Physik B - Condensed Matter, 102, 433-438 (1997).

  • Siemensmeyer, K., Clausen, K.N., Lefmann, K., Lounasmaa, O.V., Metz, A., Nummila, K.K., Rasmussen, F.B., Steiner, M., Tuoriniemi, J.T., and Vuorinen, R.T., "Nuclear order in silver at pico-Kelvin temperatures", Physica B, 768-769 (1997).

  • Oja, A.S., and Lounasmaa, O.V., "Nuclear magnetic ordering in simple metals at positive and negative nanokelvin temperatures", Reviews of Modern Physics, 69, 1-136 (1997). [DOI]

  • Ruutu, J., [Thesis] Optical interferometry on interfaces in quantum fluids and solids, Low Temperature Laboratory (1996). [URL]

  • Ruutu, J.P., Hakonen, P.J., Babkin, A.V., Parshin, A.Y., and Tvalashvili, G., "4He-crystals at mK-temperatures", HUT REPORTS, s. 44 (1996).

  • Nummila, K., "Neutron diffraction studies of nuclear order in silver at pK temperatures", Czechoslovak Journal of Physics, 46, Suppl. S6, 3271-3278 (1996).

  • Hakonen, P., Babkin, A., Parshin, A., Ruutu, J., Saramäki, J., and Tvalashvili, G., "Interferometric studies of interfaces at milliKelvin temperatures", Czechoslovak Journal of Physics, 46, Suppl. S6, 2965-2972 (1996).

  • Yao, W., Knuuttila, T.A., Martikainen, J.E., Nummila, K.K., Lounasmaa, O.V., Oja, A.S., and Lefmann, K., "A new ultralow temperature cryostat in Helsinki", Czechoslovak Journal of Physics, 46, Suppl. S5, 2793-2794 (1996).

  • Rasmussen, F.B., Baklanov, K., Hassenkam, T., Pedersen, S., Sorensen, C.B., Lindelof, P.E., Vuorinen, R.T., and Lipinski, L., "Three-axis absolute magnetometer utilizing weak localization", Czechoslovak Journal of Physics, 46, Suppl. S2, 2773-2774 (1996).

  • Tvalashvili, G., Babkin, A., Hakonen, P., Ruutu, J., and Saramäki, J., "Investigations on 3He crystals using optical interferometry at mK temperatures", Czechoslovak Journal of Physics, 46, Suppl. S1, 479-480 (1996).

  • Ruutu, J., Hakonen, P., Babkin, A., Penttilä, J., and Saramäki, J., "Anomalous growth of c-facets in 4He crystals at mK-temperatures", Czechoslovak Journal of Physics, 46, Suppl. S1, 463-464 (1996).

  • Penttilä, J., Ruutu, J., Babkin, A., Hakonen, P., and Sonin, E., "Nucleation of helium-4 crystals at millikelvin temperatures", Czechoslovak Journal of Physics, 46, Suppl. S1, 467-468 (1996).

  • Nummila, K.K., Tuoriniemi, J.T., Vuorinen, R.T., Lounasmaa, O.V., Lefmann, K., Clausen, K.N., Metz, A., Siemensmeyer, K., Lipinski, L., Steiner, M., and Rasmussen, F.B., "Neutron experiments on nuclear order in silver at pK temperatures", Czechoslovak Journal of Physics, 46, Suppl. S4, 2201-2202 (1996).

  • Lefmann, K., Tuoriniemi, J.T., Nummila, K.K., Vuorinen, R.T., and Metz, A., "Neutron thermometry of highly polarized silver nuclei", Czechoslovak Journal of Physics, 46, Suppl. S5, 2861-2862 (1996).

  • Hakonen, P., Parshin, A., Ruutu, J., Babkin, A., Penttilä, J., Saramäki, J., and Tvalashvili, G., "Spiral growth of c-facets in 4He crystals at mK-temperatures", Czechoslovak Journal of Physics, 46, Suppl. S1, 469-470 (1996).

  • Ruutu, J.P., Hakonen, P.J., Penttilä, J.S., Babkin, A.V., Saramäki, J.P., and Sonin, E.B., "Evidence of 4He crystallization via quantum tunneling at mK temperatures", Physical Review Letters, 77, 2514-2517 (1996). [DOI]

  • Ruutu, J.P., Hakonen, P.J., Penttilä, J.S., Babkin, A.V., Saramäki, J.P., and Sonin, E.B., "Evidence of 4He Crystallization via Quantum Tunneling at mK-Temperatures", HUT REPORTS, 2514-2517 (1996).

  • Steiner, M., Metz, A., Siemensmeyer, K., Lounasmaa, O.V., Tuoriniemi, J.T., Nummila, K.K., Vuorinen, R.T., Clausen, K.N., Lefmann, K., and Rasmussen, F.B., "Neutron diffraction determination of the nuclear spin ordering in Cu and Ag at nano- and subnano-K temperatures", Journal of Applied Physics, 79, 5078-5080 (1996).

  • Ruutu, J.P., Hakonen, P.J., Babkin, A.V., Parshin, A.Y., Penttilä, J.S., Saramäki, J.P., and Tvalashvili, G., "Facet growth of 4He crystals at mK temperatures", Physical Review Letters, 76, 4187-4190 (1996). [DOI]

  • Saramäki, J., Alles, H., Babkin, A., Hakonen, P., Ruutu, J., and Salojärvi, J., "Spreading of superfluid 4He on MgF2", Czechoslovak Journal of Physics, 46, Suppl. S1, 429-430 (1996).

  • Alles, H., Babkin, A.V., Hakonen, P.J., Ruutu, J.P., Salojärvi, J.T., and Saramäki, J.P., "Spreading of superfluid 4He on MgF2", Journal of Low Temperature Physics, 102, 21-29 (1996).

  • Alles, H., Ruutu, J.P., Babkin, A.V., Hakonen, P.J., and Sonin, E.B., "Optical interferometry in superfluid 3He-B", Journal of Low Temperature Physics, 102, 411-443 (1996).

  • Babkin, A.V., Alles, H., Hakonen, P.J., Parshin, A.Y., Ruutu, J.P., and Saramäki, J.P., "Observation of a new surface state on 4He crystal interfaces", Czechoslovak Journal of Physics, 46, Suppl. S1, 3324-3327 (1996). [URL]

  • Vuorinen, R., [Thesis] NMR measurements on nuclear spin systems of silver and rhodium metals at positive and negative picokelvin temperatures, Low Temperature Laboratory (1995).

  • Tuoriniemi, J., [Thesis] Neutron experiments on nuclear magnetism in copper and silver, Low Temperature Laboratory (1995). [URL]

  • Tuoriniemi, J.T., Lefmann, K., Nummila, K.K., and Metz, A., "Neutron studies of highly polarized silver nuclei at nanokelvin spin temperatures", HUT REPORTS, (1995).

  • Lounasmaa, O.V., Nummila, K.K., Tuoriniemi, J.T., Vuorinen, R.T., Clausen, C.N., Lefmann, K., Rasmussen, F.B., Metz, A., Siemensmeyer, K., and Steiner, M., "Nuclear antiferromagnetic order in Ag at nano - Kelvin - temperatures", Berlin Neutron Scattering Center Experimental Reports 1994, 355-356 (1995).

  • Tuoriniemi, J.T., Nummila, K.K., Vuorinen, R.T., Lounasmaa, O.V., Metz, A., Siemensmeyer, K., Steiner, M., Lefmann, K., Clausen, K.N., and Rasmussen, F.B., "Neutron experiments on antiferromagnetic nuclear order in silver at picokelvin temperatures", Physical Review Letters, 75, 3744-3747 (1995). [DOI]

  • Vuorinen, R.T., Hakonen, P.J., Yao, W., and Lounasmaa, O.V., "Susceptibility and relaxation measurements on rhodium metal at positive and negative spin temperatures in the nanokelvin range", Journal of Low Temperature Physics, 98, 449-487 (1995).

  • Hakonen, P.J., and Vuorinen, R.T., "Nuclear magnetic ordering in silver and rhodium at positive and negative picokelvin temperatures", Journal of Magnetism and Magnetic Materials, 140-144, 17-20 (1995).

  • Hakonen, P., and Lounasmaa, O.V., "Negative absolute temperatures: "Hot" spins in spontaneous magnetic order", Science, 265, 1821-1825 (1994).

  • Hakonen, P.J., "Calculation of nuclear-spin entropy in silver and rhodium at positive and negative temperatures using Monte Carlo simulations", Physical Review B, 49, 15363-15365 (1994). [DOI]

  • Lounasmaa, O.V., "On both sides of the absolute zero", Priroda, 4, 70-78 (1994).

  • Hakonen, P.J., Vuorinen, R.T., and Martikainen, J.E., "Anomalous spin-lattice relaxation in dilute RhFe at positive and negative nanokelvin temperatures", Physica B, 194-196, 341-342 (1994).

  • Lounasmaa, O.V., Hakonen, P., Nummila, K., Vuorinen, R., and Martikainen, J., "Negative nanokelvin temperatures in the nuclear spin systems of silver and rhodium metals", Physica B, 194-196, 291-292 (1994).

  • Hakonen, P.J., Vuorinen, R.T., and Martikainen, J.E., "Anomalous spin-lattice relaxation in dilute RhFe at positive and negative nanokelvin spin temperatures", Europhysics Letters, 25, 551-556 (1994).

  • Vuorinen, R.T., Hakonen, P.J., and Martikainen, J.E., "Nuclear antiferromagnetism in rhodium metal at positive and negative nanokelvin temperatures", Physica B, 194-196, 2818-2821 (1994).

  • Lounasmaa, O.V., [In Book] Negative temperature, McGraw-Hill Year-Book of Science and Technology (1993).

  • Hakonen, P., "Nuclear magnetic ordering in silver at positive and negative spin temperatures", Physica Scripta, T49, 327-332 (1993).

  • Vuorinen, R.T., Hakonen, P.J., and Martikainen, J.E., "Nuclear antiferromagnetism in rhodium metal at positive and negative nanokelvin temperatures", Physical Review Letters, 70, 2818-2821 (1993). [DOI]

  • Hakonen, P.J., and Vuorinen, R.T., "Nuclear ferromagnetic ordering in silver at negative nanokelvin temperatures", Journal of Low Temperature Physics, 89, 177-186 (1992).

  • Siemensmeyer, K., Steiner, M., Weinfurther, H., Clausen, K.N., Lindgård, P.-A., Annila, A.J., Lounasmaa, O.V., Oja, A.S., and Tuoriniemi, J.T., "The phase diagram and the magnetic structure of nuclear spins in elemental copper below 60 nK", Physica B, 180&181, 29-30 (1992).

  • Annila, A.J., Clausen, K.N., Oja, A.S., Tuoriniemi, J.T., and Weinfurter, H., "Neutron-diffraction studies of the nuclear magnetic phase diagram of copper", Physical Review B, 45, 7772-7788 (1992). [DOI]

  • Hakonen, P.J., Nummila, K.K., and Vuorinen, R.T., "Spin dynamics in highly polarized silver at negative absolute temperatures", Physical Review B, 45, 2196-2200 (1992). [DOI]

  • Hakonen, P.J., Nummila, K.K., Vuorinen, R.T., and Yin, S., "Antiferromagnetic ordering in silver at picokelvin temperatures", Journal of Magnetism and Magnetic Materials, 104-107, 903-904 (1992).

  • Hakonen, P.J., Nummila, K.K., Vuorinen, R.T., and Lounasmaa, O.V., "Observation of nuclear ferromagnetic ordering in silver at negative nanokelvin temperatures", Physical Review Letters, 68, 365-368 (1992). [DOI]

  • Annila, A., [Thesis] Nuclear magnetism in metals: neutron diffraction experiments on copper and NMR measurements on Silver, Low Temperature Laboratory (1991).

  • Annila, A.J., Clausen, K.N., Oja, A.S., Tuoriniemi, J.T., and Weinfurter, H., "Neutron diffraction studies of the nuclear magnetic phase diagram of copper", HUT REPORTS, (1991).

  • Kwong, Y.K., Lin, K., Hakonen, P.J., Isaacson, M.S., and Parpia, J.M., "Interfacial resistive anomaly at a normal-superconducting boundary", Physical Review B, 44, 462-465 (1991). [DOI]

  • Hakonen, P.J., and Nunes Jr., G., "Electrical transport in bismuth whiskers at millikelvin temperatures", Journal of Physics: Condensed Matter, 3, 7153-7160 (1991).

  • Oja, A.S., Annila, A.J., and Takano, Y., "Investigations of nuclear magnetism in silver down to picokelvin temperatures I", HUT REPORTS, 1-24 (1991).

  • Hakonen, P.J., Yin, S., and Nummila, K.K., "Phase diagram and NMR studies of antiferromagnetically ordered polycrystalline silver", Europhysics Letters, 15, 677-682 (1991).

  • Oja, A.S., "Nuclear magnetic ordering in copper and silver at nanokelvin temperatures", Physica B, 169, 306-315 (1991).

  • Yin, S., and Hakonen, P., "Electron-beam welded Cu-to-Ag joints for thermal contact at low temperatures", Review of Scientific Instruments, 62, 1370-1371 (1991).

  • Annila, A.J., Clausen, K.N., Hakonen, P.J., Lindgård, P.-A., Lounasmaa, O.V., Nummila, K.K., Oja, A.S., Siemensmeyer, K., Steiner, M., Tuoriniemi, J.T., Weinfurter, H., and Viertiö, H.E., "Neutron diffraction experiments on ordered silver nuclei at picokelvin temperatures - A feasibility study", Risoe National Laboratory Report Series, (1990).

  • Hakonen, P., and Yin, S., "Studies of nuclear magnetism in silver at positive and negative nanokelvin temperatures", Physica B, 165 &166, 785-786 (1990).

  • Annila, A.J., Clausen, K.N., Oja, A.S., Siemensmeyer, K., Steiner, M., Tuoriniemi, J.T., and Weinfurter, H., "Kinetics, hysteresis and nonadiabaticity of the phase transitions in the nuclear spin system of copper", Physica B, 165 &166, 783-784 (1990).

  • Annila, A.J., Clausen, K.N., Lindgård, P.-A., Lounasmaa, O.V., Oja, A.S., Siemensmeyer, K., Tuoriniemi, J.T., and Weinfurter, H., "Nuclear antiferromagnetic phases of copper in a field", Physica B, 165 &166, 781-782 (1990).

  • Lounasmaa, O.V., [In Book] Magnetic cooling, APS Encyclopedia of Physics 1990 (1990).

  • Hakonen, P., and Oja, A., "Metalliydinten spontaani magneettinen järjestyminen nanokelvinin lämpötiloissa", Arkhimedes, 42, 296-313 (1990).

  • Oja, A.S., Annila, A.J., and Takano, Y., "Cross relaxation by single spin flips in silver at nanokelvin temperatures", Physical Review Letters, 65, 1921-1924 (1990). [DOI]

  • Hakonen, P.J., Yin, S., and Lounasmaa, O.V., "Nuclear magnetism in silver at positive and negative absolute temperatures in the low nanokelvin range", Physical Review Letters, 64, 2707-2710 (1990). [DOI]

  • Annila, A.J., Clausen, K.N., Lindgård, P.-A., Lounasmaa, O.V., Oja, A.S., Siemensmeyer, K., Steiner, M., Tuoriniemi, J.T., and Weinfurter, H., "Nuclear order in copper: New type of antiferromagnetism in an ideal fcc system", Physica B, 165 &166, 1421-1424 (1990).

  • Annila, A.J., Clausen, K.N., Lindgård, P.-A., Lounasmaa, O.V., Oja, A.S., Siemensmeyer, K., Steiner, M., Tuoriniemi, J.T., and Weinfurter, H., "Nuclear order in copper: New type of antiferromagnetism in an ideal fcc system", Physical Review Letters, 64, 1421-1424 (1990). [DOI]

  • Oja, A., and Viertiö, H., "Ydinten magneettinen järjestyminen kuparissa nanokelvinlämpötiloissa", Arkhimedes, 41, 190-200 (1989).

  • Lounasmaa, O.V., "Nuclear magnetic ordering at nanokelvin temperatures", Physics Today, October, 26-33 (1989).

  • Oja, A.S., Wang, X.W., and Harmon, B.N., "First-principles study of the conduction-electron-mediated interactions between nuclear spins in copper metal", Physical Review B, 39, 4009-4021 (1989). [DOI]

  • Jyrkkiö, T.A., Huiku, M.T., Siemensmeyer, K., and Clausen, K.N., "Neutron diffraction studies of nuclear magnetic ordering in copper", Journal of Low Temperature Physics, 74, 435-473 (1989).

  • Oja, A., [Thesis] Nuclear Magnetism in Copper and Silver: Theory and Experiments, Low Temperature Laboratory (1988).

  • Jyrkkiö, T., [Thesis] Magnetic Susceptibility and Neutron Diffraction Experiments on Nuclear Ordering in Copper, Low Temperature Laboratory (1988).

  • Viertiö, H.E., Mouritsen, O.G., and Lindgård, P.-A., "Computer simulation and mean field calculation of phase diagram and adiabatic demagnetization paths for an antiferromagnet", Journal de Physique, 49, 2053-2054 (1988).

  • Oja, A.S., Annila, A.J., and Takano, Y., "Resplitting of exchange-merged NMR absorption lines at high spin polarizations", Physical Review B, 38, 8602-8608 (1988). [DOI]

  • Lindgård, P.-A., Viertiö, H.E., and Mouritsen, O.G., "Monte Carlo simulation of adiabatic cooling and nuclear magnetism", Physical Review B, 38, 6798-6806 (1988). [DOI]

  • Jyrkkiö, T.S., Huiku, M.T., Lounasmaa, O.V., Siemensmeyer, K., Kakurai, K., Steiner, M., Clausen, K.N., and Kjems, J.K., "Observation of nuclear antiferromagnetic order in copper by neutron diffraction at nanokelvin temperatures", Physical Review Letters, 60, 2418-2421 (1988). [DOI]

  • Jyrkkiö, T.A., Huiku, M.T., Clausen, K.N., Siemensmeyer, K., Kakurai, K., and Steiner, M., "Calibration and applications of polarized neutron thermometry at milli- and microkelvin temperatures", Zeitschrift für Physik B - Condensed Matter, 71, 139-148 (1988).

  • Oja, A.S., and Viertiö, H.E., "Magnetically Ordered Structures of Nuclear Spins in fcc Metals", Japanese Journal of Applied Physics, 26, 441-442 (1987).

  • Oja, A.S., "Nuclear magnetism in metals", Physica Scripta, T19, 462-468 (1987).

  • Viertiö, H.E., and Oja, A.S., "Ground state of nuclear spins in fcc metals", Physical Review B, 36, 3805-3808 (1987). [DOI]

  • Oja, A.S., and Kumar, P., "Indirect Nuclear Spin Interactions and Nuclear Ordering in Metals", Journal of Low Temperature Physics, 66, 155-167 (1987).

  • Huiku, M.T., Jyrkkiö, T.A., Kyynäräinen, J.M., and Oja, A.S., "Nuclear Magnetic Ordering in Copper: Present Knowledge and Future Experiments", Physica Scripta, T13, 114-118 (1986).

  • Kumar, P., Kurkijärvi, J., and Oja, A.S., "Nuclear magnetism in a metal", Physical Review B, 33, 444-449 (1986). [DOI]

  • Huiku, M., [Thesis] Magnetic Investigations of Nuclear Ordering in Copper at Nanokelvin Temperatures, Low Temperature Laboratory (1985).

  • Kumar, P., Kurkijärvi, J., and Oja, A.S., "Phase diagram for spontaneous magnetic ordering in copper", Physical Review B, 31, 3194- (1985). [DOI]

  • Lounasmaa, O.V., "Adiabatic Nuclear Demagnetization: Two Sophisticated Experiments,", Physica B & C, 126B+C, 8-17 (1984).

  • Oja, A.S.J., and Kumar, P., "Helical Structures of Nuclear Spins in a Metal", Physica B & C, 126B, 451- (1984).

  • Clausen, K., Huiku, M.T., Jyrkkiö, T.A., Loponen, M.T., Lounasmaa, O.V., Roach, P.R., and Sköld, K., "Neutron Diffraction Experiments on Ordered Copper Nuclei at Nanokelvin Temperatures", HUT REPORTS, (1983).

  • Huiku, M.T., Jyrkkiö, T.A., Loponen, M.T., and Lounasmaa, O.V., "Nuclear Ordering in Copper", HUT REPORTS, (1983).

  • Huiku, M.T., Jyrkkiö, T.A., and Loponen, M.T., "Experimental Entropy susceptibility vs. temperature curves of copper nuclear spins down to the ordered state", HUT REPORTS, (1983).

  • Huiku, M.T., Jyrkkiö, T.A., and Loponen, M.T., "Nuclear Magnetism in Metallic Copper at Nanokelvin Temperatures", 17th Annual Meeting of the Finnish Physical Society- (1983).

  • Huiku, M.T., Jyrkkiö, T.A., Loponen, M.T., and O.V., L., "Nuclear Cooperative Phenomena in Copper at Nanokelvin Temperatures", Conference on Quantum Fluids and Solids - 1983, 103, 441- (1983).

  • Soini, J., [Thesis] Investigations of Nuclear Magnetism in Copper at Nanokelvin Temperatures, Low Temperature Laboratory (1982).

  • Loponen, M., [Thesis] Experiments with Superfluid 3He and Nuclear Spins of Copper at Very Low Temperatures, Low Temperature Laboratory (1979).