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

Linear, χ 0 , and nonlinear, χ 2 and χ 4 , 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.