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No.1(pp.1-37)
Home > Issues > Volume 4 (1999) > No.1(pp.1-37)
 
The Magnetization Behavior of Amorphous Fe84-xNb7B8+xCu1 (x = 0, 1, 4) Alloys
Journal of Magnetics, Volume 4, Number 1, 31 Mar 1999, Pages 10-12
Kyeong-Sup Kim(Department of Physics, Chungbuk National University), Young-Mo Moon(Department of Physics, Chungbuk National University), Jae-Bong Lee(School of Electrical and Electronics Engineering, Chungbuk National University), Seong-Cho Yu(Department of Physics, Chungbuk National University), Woo-Young Lim(Department of Physics, Korea University)
Abstract
We report the salient features of the magnetic properties of amorphous Fe84-xNB7B8+xCu1 (x=0, 1, 4) alloys. The study of dc-magnetization properties and the ac-susceptibility was carried out. The temperature dependence of the magnetization follows the predictions of spin wave excitations with long wavelengths. Especially, the addition of boron modifies the magnetic properties: the spin wave stiffness increases from 56.8 to 65.7 meVÅ2 and Curie temperature increases from 298 K to 352 K. This result indicates a magnetic hardening of the exchange interaction by higher exchange energy. Thus, the substitution of iron by boron favours the increase of magnetic order in this system.
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