Spin-glasses in amorphous (Ni_(100-x)Fe_x)₇₉P₁₃B₈ alloys

Abstract

Dilute amorphous (Ni_(100-x)Fe_x)₇₉P₁₃B₈ alloys exhibit usual characteristics of spin glasses : freezing temperatures T_M (sharp cusp in zero-field susceptibility) proportional to x up to x=4 at. %. However, the magnetization does not follow the Blandin-Souletie-Tournier scaling laws. Such an anomaly can be explained within a model of ferromagnetic clusters coupled bt RKKY interaction.

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