Non-Fermi-Liquid Behavior on an Iron-Based Itinerant Electron Magnet Fe3Mo3N
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概要
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We report magnetic, calorimetric, and transport properties of an iron-based itinerant electron magnet Fe3Mo3N. Magnetic susceptibility shows a Curie–Weiss behavior at high temperatures and takes a broad maximum at around 75 K. The absence of magnetic long range order was confirmed by 57Fe-Mössbauer and neutron diffraction measurements. $C/T$ shows a divergent behavior following $-\log T$ at low temperatures and reaches 128 mJ/(f.u.mol K2) at 0.5 K. The deviation from the $T^{2}$ power law of resistivity also suggests a non-Fermi-liquid (NFL) behavior. The observed $C/T$ and $\chi$ are enhanced compared with the values estimated from the theoretical density of states, suggesting a strong magnetic enhancement. The NFL behaviors indicate that Fe3Mo3N is one of the ideal systems located in the vicinity of the ferromagnetic quantum critical point.
- 2010-04-15
著者
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Yoshimura Kazuyoshi
Department Of Applied Science Tokyo Electrical Engineering College
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TABATA Yoshikazu
Department of Earth and Space Science, Graduate School of Science, Osaka University
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Oba Fumiyasu
Department Of Materials Science And Engineering Kyoto University
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Waki Takeshi
Department Of Chemistry The Graduate School Of Science Kyoto University
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Michioka Chishiro
Department Of Chemistry Graduate School Of Science Kyoto University
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Ohoyama Kenji
Institute For Materials Of Physics Tohoku University
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Kobayashi Hisao
Graduate School Of Material Science University Of Hyogo
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Nakamura Hiroyuki
Department Of Biochemistry Osaka Medical Center For Cancer And Cardiovascular Diseases
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Ikeda Shugo
Graduate School of Science and Engineering, Yamagata University
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Terazawa Shinsuke
Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
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Waki Takeshi
Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
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KOBAYASHI Hisao
Graduate School and Faculty of Science, University of Hyogo
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Nakamura Hiroyuki
Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
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Nakamura Hiroyuki
Department of Advanced Materials, University of Tokyo, Kashiwa, Chiba 277-8561
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Tabata Yoshikazu
Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
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Ikeda Shugo
Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan
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Oba Fumiyasu
Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
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Michioka Chishiro
Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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