MAGNETIC PROPERTIES AND MAGNETOIMPEDANCE EFFECT IN TM₇₀Cr₅Si₁₀B_l5 (TM = Fe, Co, Ni) ALLOYS

Abstract

Amorphous TM₇₀Cr₅Si_l0B₁₅ (TM = Fe, Co, Ni) alloys were prepared by rapid quenching technique. Saturation magnetization of the amorphous ribbons was investigated by using SQUID and vibrating sample magnetometer from 5 to 800 K. For these two ferromagnetic alloys, the saturation magnetization up to 0.4 T_c can be described by the Bloch relation, M_s(T) = M_s(0)[1 - BT^3/2 - CT^5/2]. The spin wave stiffness constants and the range of exchange interaction were analyzed from the magnetization behaviour. And the temperature dependence of the magnetoimpedance effect was investigated in conjecture with their magnetic properties from 10 to 300 K.