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No.4(pp.111-156)

Home > Issues > Volume 2 (1997) > No.4(pp.111-156)

Temperature Dependence of Magnetization of Amorphous TM₇₀Cr₅Si₁₀B₁₅ (TM=Fe, Co, Ni) Alloys

Journal of Magnetics, Volume 2, Number 4, 31 Dec 1997, Pages 135-137

Kyeong-Sup Kim(Department of Physics, Chungbuk National University), Seong-Cho Yu(Department of Physics, Chungbuk National University), Woo-Young Lim(Department of Physics, Korea University), Wha-Nam Myuong(Department of Physics, Chonnam National University)

Abstract

We report the salient features of the magnetic properties of amorphous TM₇₀Cr₅Si₁₀B₁₅(TM=Fe, Co, Ni) alloys. The temperature dependence of magnetization for amorphous ribbons were measured by a SQUID and a VSM from 5 K to 700 K under an external field of 10 kOe. Except Ni₇₀Cr₅Si₁₀B₁₅ that shows a paramagnetic behaviour, both Fe and Co based amorphous alloys show a typical ferromagnetic thermo-magnetization curves. For these two ferromagnetic alloys, the saturation magnetization in the temperature range from 5 K to about 0.4 T_c can be descrived 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. The variation of the magnetic properties are discussed and compared with the composition of the alloys.

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