Electron spin resonance study of the LaIn3-xSnx superconducting system

Details Electron spin resonance study of the LaIn3-xSnx superconducting system Electron spin resonance study of the LaIn3-xSnx superconducting system

2011-07-13

arxiv.org/abs/1107.2587v2

J. Phys.: Condens. Matter 23, 455701 (2011)

Physics

Condensed Matter

Superconductivity

9 pages, 4 figures. Replaced with the published version and updated the bibliographic information

Scientific paper

10.1088/0953-8984/23/45/455701

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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