MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Magnetization Process in Sm2Fe17N3 Fine Powders Studied Using Lorentz Microscopy and Electron Holography
Ki Hyun KimJoong Jung KimDaisuke ShindoTakashi IshikawaKenji Ohmori
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2010 Volume 51 Issue 7 Pages 1302-1307

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Abstract

The magnetization process for Sm2Fe17N3 fine powders was studied by Lorentz microscopy and electron holography. In ex situ observations under the external magnetic field produced by an electromagnet, the change of the domain wall position was observed by Lorentz microscopy, while the drastic change in the distribution of lines of magnetic flux outside the fine powders was clarified by electron holography. Through in situ observations with a piezodriving holder with localized magnetic field produced by a sharp magnetic needle, the shift of domain walls was observed in real time by Lorentz microscopy. Finally, on the basis of Lorentz microscopy observations, the magnetization process of Sm2Fe17N3 fine powders was briefly discussed taking into account a hysteresis loop.

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© 2010 The Japan Institute of Metals and Materials
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