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arXiv 1107.2587cond-mat.supr-con
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LaIn3-xSnx超导体系的电子自旋共振研究

Electron spin resonance study of the LaIn3-xSnx superconducting system

E. M. Bittar, C. Adriano, C. Giles, C. Rettori, Z. Fisk, P. G. Pagliuso

摘要:

LaIn_(3-x)Sn_x合金系由超导泡利顺磁体组成。对于LaIn 3,超导临界温度T_c约为0.7 K,并随Sn替代量的变化而振荡,在LaSn 3端元中T_c最高,约为6.4 K。这些材料的超导状态被表征为常规类型。我们报告我们的结果为Gd 3+电子自旋共振(ESR)测量在LaIn 3-xSnx化合物作为x的函数。我们证明了Gd ~(3+)4f局域磁矩与类s导电电子之间的有效交换相互作用参数J_fs几乎不受Sn替代的影响,并从微观上观察到LaSn_3是一种常规的超导体。

英文摘要:

The LaIn3-xSnx alloy system is composed of superconducting Pauli paramagnets. For LaIn3 the superconducting critical temperature T_c is approximately 0.7 K and it shows an oscillatory dependence as a function of Sn substitution, presenting its highest value T_c ~ 6.4 K for the LaSn3 end member. The superconducting state of these materials was characterized as being of the conventional type. We report our results for Gd3+ electron spin resonance (ESR) measurements in the LaIn3-xSnx compounds as a function of x. We show that the effective exchange interaction parameter J_fs between the Gd3+ 4f local moment and the s-like conduction electrons is almost unchanged by Sn substitution and observe microscopically that LaSn3 is a conventional superconductor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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