Linear and Non-Linear Susceptibilities in Canonical Spin Glass AuFe (1.5 at.%Fe)

Abstract

Linear, χ₀, and nonlinear, χ₂ and χ₄, susceptibilities were measured in metallic spin glass AuFe. Nonlinear susceptibilities for AuFe (1.5 at.%Fe) diverge at T_g showing the power law behavior and the critical behaviors around T_g are interpreted by Suzuki’s theory based on Edwards and Anderson model. The critical exponents γ_s, δ and β were obtained to be γ_s=1.1±0.2, δ=2.0±0.2 and β∼0.9, respectively.