Nonlinear scaling behaviour of magnetization in amorphous ferromagnets

Abstract

The 'in-field' magnetization of amorphous Fe₉₁Zr₉, Fe₉₀Zr₁₀ and Fe₈₉Co₁Zr₁₀ alloys obeys the scaling equation of state in non-linear variables ε^- = (T - T_C)/T and h^- = H(T_C/T) (T_C = Curie point) from T≈ 0.4T_C to T≈ 1.4T_C while initial susceptibility follows the generalized Curie-Weiss law from T ≈ T_C to T ≈1.4 T_C. Non-analytic corrections to the singular behaviour at T_C dominate over the analytic ones in the critical region but the reverse is true for T» T_C.