ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Sound velocity of solid 3 He with an almost single magnetic domain was measured in the nuclear-ordered U2D2 phase and the paramagnetic phase along the melting curve using 10.98MHz longitudinal ultra-sound. The sound velocity increased with temperatures as T 4 in the U2D2 phase and jumped about 0.1% at the nuclear-ordered temperature T N . Above T N , it increased gradually, going through a maximum around 4mK, and then decreased as temperature increased. The temperature dependence of the sound velocity is attributed to two parts, the change in density of the solid along the melting curve and the temperature dependent internal energy of the nuclear spin. The nuclear spin contribution to the temperature dependent sound velocity agreed qualitatively with measured thermodynamical quantities. Attenuation of the sound at 10.98MHz was smaller than 0.2(cm −1 ).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022574032462
