Abstract
An extensive study of the magnetic properties of ternary spin-glasses of the form (Cu1−yMy) 1−cMnc with M = Au, Pd and Pt, 0.08 ≤ y ≤ 0.5 and c = 0.01 reveals a systematic variation of the spin-glass temperature T0 with y while the Curie-Weiss temperature, θ, is insensitive to y. This behavior is consistent with the concept that T0 depends on the first moment of the RKKY exchange interaction while θ depends on the average of this interaction. An attempt to compare these results to a theory by Larsen which includes a damping term in the exchange is qualitatively, but not quantitatively successful.
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