固体~ 4 He扭振子反常和热导率的同时测量
Simultaneous Measurements of the Torsional Oscillator Anomaly and Thermal Conductivity in Solid 4He
摘要：
在这些扭转振荡器实验中，通过测量它们的热导率来表征固体$^4$ He的样品。用阻塞毛细管法在环形容器中生长了高同位素纯度或天然浓度$^3$ He的多晶氦样品，并在退火前后进行了研究。没有相关性已被发现之间的幅度的扭转振荡器的频率和晶体缺陷的量测量的热导率的低温移位。在天然$^3$ He浓度的样品中，在低于120 mK时观察到比通常的$T^3$依赖性大得多的热导率。
英文摘要：
In these torsional oscillator experiments the samples of solid $^4$He were characterized by measuring their thermal conducitvity. Polycrystalline samples of helium of either high isotopic purity or natural concentration of $^3$He were grown in an annular container by the blocked-capillary method and investigated before and after annealing. No correlation has been found between the magnitude of the low-temperature shift of the torsional oscillator frequency and the amount of crystalline defects as measured by the thermal conductivity. In samples with the natural $^3$He concentration a substantial excess thermal conductivity over the usual $T^3$ dependence was observed below 120 mK.
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