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The influence of the magnetic history on the loop shift behavior of Fe-based amorphous ribbons

Published online by Cambridge University Press:  31 January 2011

L. Zhou ,
J. He ,
X. Li ,
B. Li  and
D.L. Zhao
J. He*
Affiliation:
Division of Functional Material Research, Central Iron & Steel Research Institute, Beijing 100081, People's Republic of China
X. Li
Affiliation:
School for Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, People's Republic of China
D.L. Zhao
Affiliation:
Division of Functional Material Research, Central Iron & Steel Research Institute, Beijing 100081, People's Republic of China
*
a)Address all correspondence to this author. e-mail: jun505432@yahoo.com.cn
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Abstract

The asymmetrical hysteresis loops were observed for the annealed Fe65Co15Si5B15 amorphous ribbons. The curves, which shift from the zero point of H axis with a unilateral step magnetization, exhibit the special magnetic features of the ribbons. A few magnetic crystalline phases were identified in the amorphous matrix of annealed ribbons by microstructure measurement. It was also found that the Z-oriented local magnetic domains emerge in the surface of ribbons with the loops shift behavior. Subsequent magnetic torque measurement indicated that the unidirectional magnetic anisotropy was induced in the amorphous ribbons with proper thermomagnetic annealing. These obtained evidences support our understanding that the magnetic history caused by thermomagnetic treatment plays a main role in promoting the formation of the asymmetrical loops.

Keywords

AmorphousAnnealingMagnetic properties
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 9 , September 2010 , pp. 1728 - 1732
Copyright
Copyright © Materials Research Society 2010

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