Effect of gold impurities on the critical properties of cumn spin-glasses

Y. Yeshurun, H. Sompolinsky

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Abstract

We present SQUID measurements of the nonlinear susceptibilitynl of "pure" CuMn and CuMn doped with gold impurities with concentrations CAu of 1, 2, and 3 at.%. Gold impurities suppress the magnitude of nl. Ordinary one-parameter scaling with respect to field and temperature is obeyed by nl of the pure CuMn. However, strong deviations from this scaling behavior are observed in the gold-doped samples in the vicinity of the freezing temperature and in low fields, H<H* where H* increases with c. This is interpreted as the onset of an anisotropy-induced crossover from a Heisenberg to an Ising spin-glass critical behavior.

Original languageEnglish
Pages (from-to)984-987
Number of pages4
JournalPhysical Review Letters
Volume56
Issue number9
DOIs
StatePublished - 1986

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