Electron spin resonance and superconductivity in GdxLa1-xAl2 intermetallic compounds

D. Davidov*, A. Chelkowski, C. Rettori, R. Orbach, M. B. Maple

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

73 Scopus citations

Abstract

Electron-spin-resonance measurements of Gd in LaAl2 exhibit appreciable change of the g value and linewidth upon alloying with other nonmagnetic impurities. This indicates the existence of a "bottleneck" effect-the relaxation rate for the conduction electrons to the Gd ions δei exceeds that to the lattice δeL. We are able to shift the g value from g=1.988±0.003 to g=2.11±0.01, opening the bottleneck completely. The intermetallic compounds GdLa1-xAl2 are Abrikosov-Gorkov superconductors in the dilute limit. Measurements of the transition temperature and the upper critical field depend upon δei directly and δeL indirectly. We are thus able to obtain parameters which determine superconducting critical-field and temperature behavior from magnetic resonance experiments.

Original languageEnglish
Pages (from-to)1029-1038
Number of pages10
JournalPhysical Review B
Volume7
Issue number3
DOIs
StatePublished - 1973
Externally publishedYes

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