2007 Fiscal Year Final Research Report Summary
Inner-shell spectroscopy study on strongly correlated electron systems at 50-Tesla high magnetic fields
| Project/Area Number |
17340111
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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 | Tohoku University (2006-2007)
Okayama University (2005) |
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Principal Investigator |
MATSUDA Yasuhiro Tohoku University, Institute for Materials Research, Associate Professor (10292757)
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| Co-Investigator(Kenkyū-buntansha) |
INAMI Toshiya Japan Atomic Agency, 量子ビーム応用研究部門, Senior Researcher (30354989)
OHWADA Kenji Japan Atomic Agency, 量子ビーム応用研究部門, Researcher (60343935)
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| Project Period (FY) |
2005 – 2007
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| Keywords | high magnetic fields / X-ray spectroscopy / valence fluctuation / strongly correlated electron systems / X-ray magnetic circular dichroism |
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| Research Abstract |
Experimental techniques for the inner-shell magneto-spectroscopy using synchrotron X-rays and pulsed high magnetic fields in the, range of 50 T were developed. We studied rare-earth based strongly correlated materials such as YbInCu_4 and EuNi_2(Si_<1-X>,Ge_X)_2. These materials show significant valence fluctuation at low temperature. Interplay between conduction electrons and localized electrons in matter has been attracting considerable attention because it is one of the most important issues to understand exotic phenomena such as high-T_c superconductivity and the heavy fermions in the so-called strongly correlated electron systems. Valence fluctuation in rare-earth intermetallics is an interesting phenomenon for investigation of the interplay between the conduction electrons and localized f-electrons. The valence states of the rare-earth ions such as Yb and Eu are directly determined in high fields for the first time. As the next step, the experiment of the X-ray magnetic circular dichroism has been performed. The characteristic features due to the significant hybridization in the matter were observed at the spectra in high magnetic fields. These findings are useful for deeper understanding of interplay between conduction and localized electrons.
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[Journal Article] Application of miniature pulsed magnets to synchrotron X-ray spectroscopy and neutron diffraction2006
Author(s)
Y. H. Matsuda, Y. Murata, T. Inami, K. Ohwada, H. Nojiri, K. Ohoyama, N. Katoh, Y. Murakami, F. Iga, T. Takabatake, A. Mitsuda and H. Wada
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Journal Title
J. Phys.: Conference Series 51
Pages: 490-493
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Application of miniature pulsed magnets tosynchrotron X-ray spectroscopy and neutron diffraction2006
Author(s)
Y. H. Matsuda, Y. Murata, T Inami, K. Ohwada, H. Nojiri, K. Ohoyama, N. Katoh, Y. Murakami, F. Iga, T. Takabatake, A. Mitsuda, H. Wada
Organizer
Yamada Conference LX on Research in High Magnetic Fields
Place of Presentation
Sendai
Year and Date
2006-08-18
Description
「研究成果報告書概要(欧文)」より
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