Irreversible response in spin-glasses: An experimental study in amorphous Fe-Mn

Y. Yeshurun, H. Sompolinsky

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Abstract

The equilibrium and nonequilibrium susceptibilities e and ne of the spin-glass (Fe0.64Mn0.36)75P16B6Al3 have been measured as functions of temperature (4.2<~T<~80 K) and a cooling field (8 Oe<~H<~2 kOe). A phase transition occurs at a temperature Tc(H) below which the irreversible response (T)T(e-ne) appears. Tc(H) decreases from the freezing temperature (Tf=41.6 K) as H0.750.1. For small 1-TTc(H), behaves as A+B2 with field-dependent coefficients A and B and A(H=0)=0. The results are compared with the predictions of the mean-field theory of spin-glasses.

Original languageEnglish
Pages (from-to)1487-1490
Number of pages4
JournalPhysical Review B
Volume26
Issue number3
DOIs
StatePublished - 1982

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