2007 Fiscal Year Final Research Report Summary
Investigation on Local Electron-Spin-Polarization in Nano-Structured Magnetic Thin Films in Equilibrium andNon-Equiibrium States
| Project/Area Number |
17340108
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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 |
Condensed matter physics II
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| Research Institution | Nagoya Institute of Technology |
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Principal Investigator |
MIBU Ko Nagoya Institute of Technology, Graduate School of Science, Professor (40222327)
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| Co-Investigator(Kenkyū-buntansha) |
SETO Makoto Kyoto University, Rench Reactor Intitute, Professor (40243109)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Synchrotron Radiation / Nuclear Resonant Scattering / Mossbauer Soectroscopy / Electron Spin Polarization / Local Magnetism / Thin Films / Interface Effect / Sointronics |
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| Research Abstract |
Nuclear resonant scattering, a newly developing experimental method which can detect magnetic hyperfine field, was applied in order to study local electron-spin-polarization or local magnetism in nano-structured metallic thin films. X-ray beams corresponding to the Mossbauer transition energy of "Fe or rrsSn were monochromatized into a width of several meV and injected to the samples containing "Fe or rrsSn as nuclear probes. The X-rays resonantly scattered by the probing nuclei were recorded as a function of time to obtain "time spectra".
After some optimization of the experimental setup, time spectra in good S/N ratio were successfully obtained for a monatomic "Fe layer deposited on a Cr layer. It was found that the time spectra were different among samples with different Cr layer thickness and also between samples with and without a ferromagnetic ssFe layer under the Cr layer. The results suggest that the magnetic structure of the Cr layer and also the magnetic hyperfine field at the "Fe probes are changed by the existence of the underlaid ferromagnetic ssFe layer due to the magnetic frustration effect at the ssFe/Cr interface.
Measurements were also done for L2i-type XiYZ Heuslar alloy films and B2-type XY artificial alloy films, which were prepared by alternate deposition of monatomic or sub-atomic layers of ingredient elements. For CosMnSn Heuslar alloy films, beautiful periodic beat patterns were observed in the time spectra, which reflects the realization of samples with highly-ordered crystallographic structures. For CoSn artificial alloys, the hyperfine field was found to be small at both room temperature and low temperatures.
In this way, the nuclear resonant scattering offers us some unique information on local magnetism which cannot be obtained by other experimental methods, and would also be applicable to the studies on ltral electron-spin-polarization in non-equilibrium states.
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Research Products
(43 results)
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[Journal Article] Detection of Local Electron-Spin Polarization in Metallic Thin Films Using 1195n Nuclear Resonant Scattering2005
Author(s)
K, Mibu, Y, Otsuka, R, Masuda, Y, Kobayashi, M, Seto, T, Mitsui
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Journal Title
Nanotechnology in SPring-8, 6 2005A
Pages: 62-64
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Detection of Local Electron-Spin Polarization in Cr-Based Metallic Thin Films Using Nuclear Resonant Scattering2005
Author(s)
K, Mibu, Y, Otsuka, R, Masuda, S, Kitao, M, Seto, T, Mitsui
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Journal Title
Nanotechnology in SPring-8, 7 2005B
Pages: 27-29
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Investigation on Magnetism of Monatomic Fe Layers on Cr(001) Using Nuclear Resonant Scattering2008
Author(s)
K. Mibu, E. Suharyadi, W. Zhang, Y. Otsuka, M. Seto, S. Kitao, Y. Kobayashi, R. Masuda, S. Higashitaniguchi, T,. Mitsui
Organizer
3rd Symposium on Synchrotron Radiation in JAEA
Place of Presentation
Sayo, Japan
Year and Date
2008-02-28
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Local Magnetism of Monatomic Fe Layers on Cr(001) Studied through Nuclear Resonant Scattering2007
Author(s)
K. Mibu, W. Zhang, Y. Otsuka, E. Suharyadi, M. Seto, Y. Kobayashi, S. Kitao, R. Masuda, S. Higashitaniguchi, T. Mitsui
Organizer
31th Annual Conference on Magnetics in Japan
Place of Presentation
Tokyo, Japan
Year and Date
2007-09-13
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Investigation on Magnetism of Monatomic Fe Layers Using Nuclear Resonant Scattering2007
Author(s)
K, Mibu, W, Zhang, Y, Otsuka, M, Seto, Y, Kobayashi, S, Kitao, R, Masuda, S, Higashitaniguchi, T, Mitsui
Organizer
2007 Spring Meeting of the Physical Society of Japan
Place of Presentation
Kagoshima, Japan
Year and Date
2007-03-18
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Magnetism of Monatomic Fe Layer on Cr Studied through Nuclear Resonant Scattering2006
Author(s)
K, Mibu, Y, Otsuka, R, Masuda, S, Higashitaniguchi, S, Kitao, M, Seto, T, Mitsui
Organizer
30th Annual Conference on Magnetics in Japan
Place of Presentation
Matsue, Japan
Year and Date
2006-09-14
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Competition between Interface Effect and Nesting Effect in Cr-Based Multilayers with Monatomic Layers of X (X = Sn, Au, Ag, V or Fe)2006
Author(s)
K, Mibu, N, Jiko, Y, Otsuka, M, Takeda
Organizer
International Conference on Magnetism
Place of Presentation
Kyoto, Japan
Year and Date
2006-08-21
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Local Spin Polarization in CozMnSn Heusler-Alloy Films and Magnetoresistance of CosMnSn-Based Multilayers2006
Author(s)
K, Mibu, W, Zhang, T, Okuno, Y, Otsuka, Y, Sakai, G, Koizumi, N, Jiko, K, Yoshimura
Organizer
19th International Colloquium on Magnetic Films and Surfaces
Place of Presentation
Sendai, Japan.
Year and Date
2006-08-17
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Ono Spin Distribution in Au Layers of Fe/Au(001) Multilayers Analyzed by Resonant X-Ray Magnetic Scattering2005
Author(s)
T, Ohkochi, K, Mibu, N, Hosoito, Y, Otsuka, K, Kodama, S, Kasai, T
Organizer
2005 Autumn Meeting of the Physical Society of Japan
Place of Presentation
Kyotanabe, Japan
Year and Date
2005-09-20
Description
「研究成果報告書概要(欧文)」より
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