Thermoelastic Effect in Niobium at the Superconducting Transition
Thermoelastic Effect in Niobium at the Superconducting Transition
复制标题
铌在超导转变时的热弹性效应
DOI：
10.1103/physrevlett.49.375
复制
发表时间：
1982
影响因子：
8.6
通讯作者：
J. Ferreirinho
中科院分区：
文献类型：
--
作者：
D. Blair;J. Ferreirinho
通过超导转变温度T/sub - c/，观察到多晶铌盘样品在弯曲模式下的声损失Q/sup -1/突然下降。在1.6 khz模式下对一个样品进行的高分辨率测量显示，在20 mk温度间隔内，Q/sup -1/降低30%。结果表明，这些结果与超导状态下对声损失的热弹性贡献的减少清楚地识别出来。
An abrupt decrease in acoustic loss Q/sup -1/ has been observed in flexural modes of polycrystalline Nb disk samples on cooling through the superconducting transition temperature T/sub c/. High-resolution measurements on a 1.6-kHz mode of one sample showed a 30% decrease in Q/sup -1/ in a 20-mK temperature interval. It is shown that these results are clearly identifiable with the reduction of the thermoelastic contribution to the acoustic loss in the superconducting state.