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Electronic and Magnetic Properties of Thin (111) Films of Fe sub( 2)CrSi
On the basis of the electronic structures obtained by first-principles calculations, we have studied the half-metallicity of a (111) film of the Heusler compound Fe 2 CrSi, which is predicted to be a half-metallic ferromagnet in its bulk. The result shows that a film with a surface consisting of Si...
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Published in: | Journal of the Physical Society of Japan 2012-09, Vol.81 (9), p.1-1 |
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Main Authors: | , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | On the basis of the electronic structures obtained by first-principles calculations, we have studied the half-metallicity of a (111) film of the Heusler compound Fe 2 CrSi, which is predicted to be a half-metallic ferromagnet in its bulk. The result shows that a film with a surface consisting of Si atoms holds a perfect spin polarization (100%) and that a film with a surface consisting of Cr or Fe atoms also has a high spin polarization (larger than 90%). However, the width of the gap in the down-spin state is sensitive to the surface. In the film with a surface consisting of Si atoms, the width is almost unchanged from the bottom layer to the top layer, but not in the other films. |
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ISSN: | 0031-9015 1347-4073 |