Surface crystallization and frequency dependence of AC coercivity in Fe80B20 amorphous alloy

被引：12
|
作者：
Vavassori, P
Ronconi, F
Traldi, M
Puppin, E
机构：
[1] Univ Ferrara, INFM, Dipartimento Fis, I-44100 Ferrara, Italy
[2] Politecn Milan, INFM, Dipartimento Fis, I-20132 Milan, Italy
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1998年 / 177卷
关键词：
amorphous systems; Kerr effect; coercivity; domain dynamics;
D O I：
10.1016/S0304-8853(97)00659-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report here, for the first time, the results of a study of the frequency dependence of coercivity (H-c(f)) at the surface of amorphous and partially crystallized Fe80B20 samples with different degrees of crystallization. H-c(f) shows a shape which does not depend on either the surface or bulk structure (i.e. crystalline or amorphous), consisting of a nearly constant value of H-c up to 100 Hz followed by a knee and a rapid increase as frequency is further increased. Our data are well fitted by a functional law H-c(f) proportional to f(alpha) with alpha = 0.45 for the amorphous sample and alpha = 0.49 for the partially crystallized samples. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：127 / 128
页数：2
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