MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Observation of Magnetic Domain Structure in Fe81B15Si4 Amorphous Alloy by Lorentz Microscopy and Electron Holography
Masahiro HiraokaZentaro AkaseDaisuke ShindoYuichi OgawaYoshihito Yoshizawa
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2009 Volume 50 Issue 12 Pages 2839-2843

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Abstract

Effects of heat treatment, with and without an external magnetic field, on the magnetic properties of Fe81B15Si4 amorphous specimens are investigated by Lorentz microscopy and electron holography. These observations are used to clarify the details of magnetizing processes in the specimens. It is found that heat-treatment with an external magnetic field increases the magnetic anisotropy, while that without reduces the magnetic anisotropy. It is considered that this difference results from the alleviation of the strain field by heat treatment and the induced magnetic anisotropy caused by heat treatment with a magnetic field.

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© 2009 The Japan Institute of Metals and Materials
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