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Selected Recent Publications

Aging of solid 4He under torsional oscillation at low temperatures,” P. Gumann and H. Kojima, Low Temp Phys. (FNT) 39, 893 (2013).

Hysteretic response of torsionally oscillated solid 4He and its dependence on 3He impurity concentration,” P. Gumann, M.C. Keiderling, and H. Kojima, Phys. Rev.  B83J. Low Temp. Phys. 168, 162 (2012).

Effects of 3He impurity on solid 4He studied by compound torsional oscillator,” P. Gumann, M.C. Keiderling, D. Ruffner and H. Kojima, Phys. Rev.  B83, 224519 (2011).

Spin fluid dynamics observed by magnetic fountain effect and mechanical pumping effect in the ferromagnetic superfluid 3He A1 phase,” Y. Aoki, A. Yamaguchi, K. Suzuki, H. Ishimoto and H. Kojima, Phys. Rev. B 80, 054527 (2010).

New Spin pump for boosting spin polarization of superfluid 3He A1 phase,” A. Yamaguchi, Y. Aoki, S. Murakawa, H. Ishimoto and H. Kojima, Phys. Rev. B 82, 054507 (2009).

New Relaxation Phenomenon in Oscillating Solid 4He,” Y. Aoki, M.C. Keiderling, and H. Kojima, Phys. Rev. Lett. 100, 215303 (2008).

“Search for Fourth Sound Propagation in Supersolid 4He,” Y. Aoki, X. Lin and H. Kojima, Invited Paper to the Helium Liquefaction Centennial Celebration Issue in Low Temperature Physics (Fizika Nizkikh Temperatur) 34, 329 (2008).

“Spin Polarized Superfluid 3He A1,” H. Kojima and H. Ishimoto, Journal of Physical Society of Japan, 77, 111001(2008). (Invited review paper in Special Topics, “New Frontiers of Quantum Fluids and Solids”).

“Oscillation Frequency Dependence of Non-Classical Rotation Inertia of Solid 4He,” Y. Aoki, J.C. Graves and H. Kojima, Phys. Rev. Lett. 99, 015301-4(2007).

“Minority Spin Condensate in the Spin-Polarized Superfluid 3He A1 Phase,” A. Yamaguchi, S. Kobayashi, H. Ishimoto and H. Kojima, Nature 444, 909(2006).

“Preliminary Report on Heat Pulse Propagation in Solid He-4,” Y. Aoki and H. Kojima, International Conference on Quantum Fluids and Solids. Kyoto, 2006.  Accepted and to be publication in J. Low Temp. Phys. (pdf)

Spin Relaxation in 3He-A1 Measured by Magnetic Fountain Pressure,” R. Masutomi, H. Kojima, K. Kimura, A. Yamaguchi and H. Ishimoto, J. Low Temp. Phys. 138, 789(2005). (pdf)

Spin-Entropy Wave Propagation in Magnetically Polarized Superfluid 3He,” Marina Bastea, James Coleman, Paul de Vegvar, Yuichi Okuda, Taro Sato and Harry Kojima. J. Low Temp. Phys. 137, 539-578 (2004). (pdf)

Instability of the 2S Electron Bubbles,” P. Grinfeld and H. Kojima, Phys. Rev. Lett., 91, 105301(2003). (pdf)

Interaction Effects in Conductivity of Si Inversion Layers at Intermediate Temperatures,”  V.M. Pudalov, M.E. Gershenson, G. Brunthaler, A. Prinz and G. Bauer, Phys. Rev. Lett., 91, 126403(2003). (pdf)

63Cu nuclear relaxation in the QCP system CeCu5.9Au0.1,” R.E. Walstedt, H. Kojima, N. Butch and N. Bernhoeft, Phys. Rev. Lett. 90, 067601(2003). (pdf)

Single bubble sonoluminescence from noble gas mixtures,” J. da Graca and H. Kojima, Phys. Rev. E 66, 066301(2002). (pdf)

The low-density spin susceptibility and effective mass of mobile electrons in Si inversion layers, “ V.M. Pudalov, M. Gershenson, H. Kojima, N. Butch, E.M. Dizhur G. Brunthaler, A. Prinz and G. Bauer,  Phys.  Rev.  Lett.  88, 196404(2002). (pdf)

Velocity and Absorption of Sound Waves in Superfluid 3He,” H. Kojima, Chapter 4, Elastic Property of Fluids: Liquids and Gases, edited by R. Raspet and M. Levy, Volume 4, Handbook of Elastic Properties of Solids, Liquids, and Gases, Academic Press, New York, 2001.

"Attenuation of Second Sound in Superfluid 3He-A1," T. Sato, J. J. Coleman, P. G. N. deVegvar, H. Kojima, and Y. Okuda, Phys. Rev. Lett., 84, 1515 (2000). (pdf)

"Explosive Textural Polarization and Non-Equilibrium Phase Transitions in Superfluid 3He-A1," P. deVegvar, K. Ichikawa, and H. Kojima, Phys. Rev. Lett., 83,  1806 (1999). (pdf)

"Manipulation of 1 Texture by Counterflow in Superfluid 3He-A1," M. Bastea, K. Ichikawa, and H. Kojima, J. Low Temp. Phys., 110,  63 (1998).

"Observation of Nonlinear Propagation of Spin-Entropy Wave in Superfluid 3He," M. Bastea, H. Kojima, and P. G. N. deVegvar, Phys. Rev. Lett., 76,  2766 (1996).

Other Selected Publications

"Development of a 3He-hydraulic actuator for spin pum in superfluid 3He-A1," A. Yamaguchi, M. Wada, H. Tanaka, G. Motoyama and H. Kojima, J. of Phys. Conf. Series 400, 01208 (2012).

"Pressure Dependence of Superfluid Fraction in 3He-A1," M. Bastea, Y. Okuda, and H. Kojima, Phys. Rev. Lett.,  74,  2531 (1995).

"Probing Porous Media with 1st and 2nd Sound: II. Acoustic Properties of Water-Saturated Porous Media," D. L. Johnson, T. Plona, and H. Kojima, J. App. Phys.,  76,  115 (1994).

"Boundary Conditions on Superfluid 3He as Altered by 4He Interfacial Layer," D. Kim, M. Nakagawa, O. Ishikawa, T. Hata, T. Kodama, and H. Kojima, Phys. Rev. Lett.,  71,  1581 (1993).

"Magnetic Relaxation and 4He Coverage in Superfluid 3He-A1," Q. Jiang, and H. Kojima, Phys. Rev.,  BR45,  12616 (1992).


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