Experimental Confirmation of Grain Boundary Magnetism in Fe–Si and Fe–Sn Alloys by TEM-EELS
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- Ii Seiichiro
- Research Center of Structural Materials, National Institute for Materials Science
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- Hirayama Kyosuke
- Department of Materials Science and Engineering, Graduate School of Science and Technology, Kumamoto University
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- Tsurekawa Sadahiro
- Structure Materials, Division of Materials Science and Chemistry, Faculty of Advanced Science and Technology, Kumamoto University
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<p>We measured the local magnetic moments at grain boundaries in Fe–Si and Fe–Sn alloys by electron energy loss spectroscopy with a transmission electron microscope and evaluated the relation between the grain boundary magnetism and grain boundary segregation in Fe–Si and Fe–Sn alloys. We found that the local magnetic moments at the random boundaries in these alloys were remarkably reduced in comparison with those in pure Fe, whereas there was no considerable change at the Σ5 grain boundary and low-angle boundary. The variation of the local magnetic moments at impurity-segregated grain boundaries was explained by the competition between magnetovolume effect and hybridizations of electrons. It was found that the grain boundary character remarkably affects this hybridization. The decrease in the magnetic moments at random grain boundaries was more pronounced in the Fe–Sn alloy than in the Fe–Si alloy.</p>
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 60 (5), 636-641, 2019-03-01
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282763110212224
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- NII論文ID
- 130007636515
- 40021879097
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 029658239
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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