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arXiv · 1107.2587

Electron spin resonance study of the LaIn3-xSnx superconducting system

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

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.

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E. M. Bittar, C. Adriano, C. Giles, C. Rettori, Z. Fisk, P. G. Pagliuso. 2011-10-24. Electron spin resonance study of the LaIn3-xSnx superconducting system. https://doi.org/10.1088/0953-8984%2F23%2F45%2F455701

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