Thermal conductivity, thermal diffusivity and thermoelectric power of Sm-based bulk superconductors
Thermal conductivity, thermal diffusivity and thermoelectric power of Sm-based bulk superconductors
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Sm基体超导体的热导率、热扩散率和热电势
DOI：
10.1109/tasc.2002.1018599
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发表时间：
2002
影响因子：
1.8
通讯作者：
S. Kohayashi
中科院分区：
文献类型：
--
作者：
H. Fujishiro;S. Kohayashi
测量了高取向Ag掺杂超导材料Sm/sub 1+2x/Ba/sub 2+x/Cu/sub 3+x/O/sub 7+5x/的ab面导热系数/spl kappa//sub ab/(T)、热扩散率/spl alpha//sub ab/(T)和热电势S/sub ab/(T) (X = 0.1 /spl sim/ 0.4）通过熔融法制备。随着Sm/sub 2/BaCuO/sub 5/ (Sm211)第二相含量X的增加，/spl kappa//sub ab/的绝对值及其低于T/sub c/的特性增强受到抑制，而随着掺杂Ag含量的增加而增强。施加高达 10 T 的磁场表明，当施加垂直于 ab 平面的磁场时，涡旋引起的声子散射得到最大程度的增强。捕获的磁场还严重抑制了/spl kappa//sub ab/(T) 增强。
The ab-plane thermal conductivity /spl kappa//sub ab/(T), thermal diffusivity /spl alpha//sub ab/(T) and thermoelectric power S/sub ab/(T) were measured for the highly-oriented Ag-doped superconducting materials Sm/sub 1+2x/Ba/sub 2+x/Cu/sub 3+x/O/sub 7+5x/ (X = 0.1 /spl sim/ 0.4) prepared by a melt process. The absolute value of /spl kappa//sub ab/ and its characteristic enhancement below T/sub c/ were suppressed with increasing content X of the Sm/sub 2/BaCuO/sub 5/ (Sm211) secondary phase, while they were enhanced with increasing content of doped-Ag. The application of the magnetic field up to 10 T clarified that the phonon scattering by vortices was most enhanced with the applied field perpendicular to the ab-plane. The trapped magnetic field also seriously suppressed the /spl kappa//sub ab/(T) enhancement.