1998 Fiscal Year Final Research Report Summary
Study of the exchange force and the magnetic force between tip and sample
| Project/Area Number |
09450014
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
表面界面物性
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
NAKAMURA Kohji Catalysis Research Center, Hokkaido Univ., Instructor, 触媒化学研究センター, 助手 (70281847)
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| Co-Investigator(Kenkyū-buntansha) |
SUEOKA Kazuhisa Graduate School of Eng., Hokkaido Univ., Associate Prof., 大学院・工学研究科, 助教授 (60250479)
MUKASA Kouich Graduate School of Eng., Hokkaido Univ., Prof., 大学院・工学研究科, 教授 (00001280)
HAYAKAWA Kazunobu Catalysis Research Center, Hokkaido Univ., Prof., 触媒化学研究センター, 教授 (80218552)
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| Project Period (FY) |
1997 – 1998
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| Keywords | exchange force microscopy / magnetic force microscopy / exchange interaction / magnetic interaction |
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| Research Abstract |
Magnetic force microscopy (MFM), which detects the force arising from an interaction between magnetic dipoles of a tip and a sample, is a successful scanning probe technique for observing magnetic structures such as magnetic domain structures. However, it does not enable determination of the magnetic structure on an atomic scale since the magnetic dipole interaction is a long-range one. The typical tip-sample separations in MFM are on the order of more than 10nm and the spatial resolution is on the order of l0nm to l00nm. An improvement of the resolution might be made by probing the short-range exchange force at closed tip-sample separations.
In the present study, we investigated the exchange interaction and the exchange force between two magnetic Fe(00 1) films by first-principles calculations, to understand the exchange force between the tip and the sample and discussed a possibility of measuring the exchange force through atomic force microscopy (AFM).
The obtained exchange forces are sufficiently larger than the sensitivity of the current atomic force microscopy. We also observed strong variation of the exchange force relative to the surface site. The magnitudes of the force variation are larger than the force sensitivity of conventional AFM.These results suggest that a surface magnetic image with atomic resolution may be achieved by measuring the exchange force.
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