The A-B Transition of Superfluid Helium-3 in Aerogel and the Effect of Anisotropic Scattering
摘要：
We report the results of high-frequency acoustic shear impedance measurements on superfluid He3 confined in 98% porosity silica aerogel. Using 8.69MHz continuous wave excitation, we measured the acoustic shear impedance as a function of temperature for the sample pressures of 28.4 and 33.5bar . We observed the A-B transition on warming in zero magnetic field. Our observations show that the A and Bphases in aerogel coexist in a temperature range of about 100μK in width. We propose that differences in the relative stability of the A and B phases arising from anisotropic scattering can account for our observations.
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DOI：
10.1103/PhysRevB.72.094519
被引量：
年份：
2005
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