2012 Fiscal Year Final Research Report
Physical Properties of Novel 4f electrons in ytterbium-based compounds
| Project/Area Number |
23740276
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | University of Hyogo |
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Principal Investigator |
KOYAMA Takehide 兵庫県立大学, 大学院・物質理学研究科, 助教 (30397666)
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| Project Period (FY) |
2011 – 2012
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| Keywords | イッテルビウム化合物 / 重い電子系 / NMR |
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| Research Abstract |
In order to investigate an electronic state in Yb-based compounds with large low-temperature specific heat, we performed NMR measurement in the half-Heusler compound YbPtSb. The characteristics of localized 4f spins were observedat high temperatures. We found that the dynamicalelectronic properties change at around 10 K, which were observed as anomalies in the nuclear spin-lattice relaxation rate and the nuclear spin-spin relaxation rate. However, any anomalies were detected in static properties such as Knight shift and a specific heat. This unusual low-temperature state may be associated with the formation of the small magnetic moment which observed in the magnetically ordered state below 0.4 K.
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[Journal Article] Observation of the partial Fermi Surface Quenching in the Noncentrosymmetric Superconductor Mo_3Al_2C2012
Author(s)
T. Koyama, Y. Ozaki, K. Ueda, T. Mito, T.Kohara, T. Waki, Y. Tabata, C. Michioka, Y. Yoshimura, M.T. Suzuki, and H. Nakamura
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Journal Title
Journal of Physical Society of Japan
Volume: Vol. 81 Suppl. B
Pages: 1-5
DOI
Peer Reviewed
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[Journal Article] Mechanism of Field Induced Fermi Liquid State in Yb-Based Heavy-Fermion Compound: X-ray Absorption Spectroscopy and Nuclear Magnetic Resonance Studies of YbCo_2Zn_202012
Author(s)
T. Mito, T. Koyama, K. Nakagawara, T. Ishida, K. Ueda, T. Kohara, K. Matsubayashi, Y. Saiga, K. Munakata, Y. Uwatoko, M. Mizumaki, N. Kawamura, B. Idzikowski, and M. Reiffers
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Journal Title
Journal of Physical Society of Japan
Volume: Vol. 81
Pages: 033706 1-4
DOI
Peer Reviewed
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[Journal Article] 77Se-NMR study of quasi-one dimensional organic conductor (TMTSF)_2X2012
Author(s)
K. Nishiyama, T. Mito, Y. Kujirai,T. Koyama, K. Ueda, T. Kohara, K. Takeuchi, H. Akutsu, J. Yamada, A. Kornilov, V. M. Pudalov and J. S. Qualls
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Journal Title
Journal of Physics:Conference Series
Volume: Vol. 344
Pages: 012026 1-4
DOI
Peer Reviewed
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[Journal Article] Partial gap opening on the Fermi surface of the noncentrosymmetric superconductor Mo_3Al_2C2011
Author(s)
T. Koyama, Y. Ozaki, K. Ueda, T. Mito, T. Kohara, T. Waki, Y. Tabata, C. Michioka, K. Yoshimura, M.-T. Suzuki, and H. Nakamura
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Journal Title
Physical Review B
Volume: Vol.84
Pages: 212501 1-4
DOI
Peer Reviewed
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[Presentation] BaCo_2V_2O_8における磁場誘起インコメンシュレート相のNMRによる研究2013
Author(s)
川崎祐,岸本豊,出田勇亀一,西山功兵,小山岳秀,水戸毅,八島光晴,椋田秀和,北岡良雄,大村公美子,藤田崇仁,木村尚次郎,萩原政幸
Organizer
日本物理学会第68回年次大会
Place of Presentation
広島大学
Year and Date
2013-03-26
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[Presentation] SmB_6における半導体ギャップ構造の圧力依存性2013
Author(s)
西山功兵,水戸毅,G. Pristas,小山岳秀,上田光一,小原孝夫,S. Gabani,M. Reiffers,小牧泰大,富沢裕樹,深澤英人,小堀洋,竹下直,N. Shitsevalov
Organizer
日本物理学会第68回年次大会
Place of Presentation
広島大学
Year and Date
2013-03-26
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[Presentation] 圧力下におけるSmB_6の^11B-NMRによる研究II2012
Author(s)
西山功兵,水戸毅,Gabriel Pristas,小山岳秀,上田光一,小原孝夫,Slavo Gabani,Marian, Reiffers,小牧泰大,富沢裕樹,深澤英人,小堀洋,竹下直,Natalia Shitsevalova
Organizer
日本物理学会2012秋季大会
Place of Presentation
横浜国立大学
Year and Date
2012-09-20
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[Presentation] The Observation of the partial Fermi Surface Quenching in the Noncentrosymmetric Superconductor Mo_3Al_2C2011
Author(s)
T. Koyama, Y. Ozaki, K. Ueda, T. Mito, T. Kohara,T. Waki, Y. Tabata, C. Michioka, K. Yoshimura, M.-T. Suzuki, and H. Nakamura
Organizer
International workshop on heavy fermions, TOKIMEKI 2011
Place of Presentation
大阪大学
Year and Date
2011-11-26
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