| Project/Area Number |
23656034
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Thin film/Surface and interfacial physical properties
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
KURAHASHI Mitsunori 独立行政法人物質・材料研究機構, 極限計測ユニット, 主席研究員 (10354359)
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 表面・界面物性 / 磁性 / 酸化物 |
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| Research Abstract |
Half-metallic ferromagnets are important materials in the field of spintronics, but the spin polarization at their surfaces or interfaces is usually much lower than 100%, causing the transport properties of the devices much lower than expected from the bulk spin polarization. We have previously reported that the surface spin polarization of Fe3O4(100) can be drastically improved by hydrogen termination. In this study, we analyzed this phenomena for an Fe3O4(111) surface and tried to utilize it for inducing high spin polarization to adsorbed molecules. We clarified that the spin polarization at the (111) surface is positive unexpectedly and is not improved by H termination. This would originate from the fact that the tetrahedrally-cordinated Fe terminates the (111) surface.
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