Bulletin of materials science | |
Temperature dependence of thermal conductivity of vanadium substituted BPSCCO system between 10 and 150 K | |
T K Dey1  A K Dhami1  | |
[1] Cryogenic Engineering Centre, Indian Institute of Technology, Kharagpur 721 302, India$$Cryogenic Engineering Centre, Indian Institute of Technology, Kharagpur 721 302, IndiaCryogenic Engineering Centre, Indian Institute of Technology, Kharagpur 721 302, India$$ | |
关键词: Thermal conductivity; high temperature superconductors; vanadium substitution; electron + phonon approach.; | |
DOI : | |
学科分类:材料工程 | |
来源: Indian Academy of Sciences | |
【 摘 要 】
Thermal conductivity of a set of (Bi0.8Pb0.2�?���?V�)2Sr2Ca2Cu3O10+� (0 = � �? 0.05) pellets in the temperature range between 10 and 150 K is reported. Vanadium substitution influences strongly the magnitude of thermal conductivity (�) over the entire temperature range. But the nature of �(�?) dependence remains similar to that generally observed for HTSCs. The electronic contribution to the total � in the normal state is estimated to be ∼ 25%. We have attempted to examine our data, assuming the role of both electrons and phonons in the origin of the �(�?) behaviour below �?� . Observed temperature variation of �(�?) for the present set of samples could be explained very well assuming this electron + approach. Some of the microscopic quantities estimated from the best-fit parameters give reasonable values.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912010228126ZK.pdf | 133KB | download |