High transition temperature in antiferromagnetic Cerium Kondo semiconductor
| Project/Area Number |
15K05180
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Toyama Prefectural University |
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Principal Investigator |
MURO YUJI 富山県立大学, 工学部, 准教授 (50385530)
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| Research Collaborator |
FUKUHARA Tadashi 富山県立大学, 工学部, 教授
KUWAI Tomohiko 富山大学, 理学部, 教授
TAKABATAKE Toshiro 広島大学, 大学院先端物質科学研究科, 教授
UMEO Kazunori 広島大学, 自然科学研究支援開発センター, 准教授
HAYASHI Kyosuke 広島大学, 大学院先端物質科学研究科, 院生
ADROJA Devashibhai ラザフォード・アップルトン研究所, ISIS施設, 上級研究員
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 磁性 / 強相関電子系 / セリウム化合物 / 近藤半導体 / 反強磁性秩序 / 異常反強磁性秩序 / 元素置換効果 / 異方的近藤効果 / 局所反転対称性の欠如 / 新物質開発 / 異方的c-f混成 |
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| Outline of Final Research Achievements |
In order to clarify the origin of unusually high transition temperature 27 K in an antiferromagnetic Kondo semiconductor CeRu2Al10, we have investigated the correlation between the concentration of conduction electrons and antiferromagnetic order by substituting Si and Zn for Al atom. With decreasing electron concentration, the Kondo effect is enhanced. On the other hand, the antiferromagnetic transition temperature and magnitude of hybridization gap show maximum at pure CeRu2Al10. Because the magnetic property of CeRu2Al10 depends on the average electron number irrespective of subustitution elements, we have proposed that the anisotropic c-f hybridization in CeRu2Al10 should be caused from the complex conduction band constituted by the hybridization between Ru 4d and Al 3p electrons.
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Report
(4 results)
Research Products
(36 results)
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[Journal Article] Sb-NMR/NQR studies of heavy fermion system YbRhSb2017
Author(s)
Yasuki Kishimoto, Yosiki Awai, Hisashi Kotegawa, Hideki Tou, Yuji Muro, Koji Nakamura, Masafumi Sera, and Toshiro Takabatake
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Journal Title
Journal of Physics: Conference Series
Volume: 807
Pages: 012014-012014
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Journal Article] Quantitative study of the f occupation in CeMIn5 and other cerium compounds with hard X-rays2016
Author(s)
M. Sundermann, F. Strigari, T. Willers, J. Weinen, Y. F. Liao, K. -D. Tsuei, N. Hiraoka, H. Ishii, H. Yamaoka, J. Mizuki, Y. Zekko, E. D. Bauer, J. L. Sarrao, J. D. Thompson, P. Lejay, Y. Muro, K. Yutani, T. Takabatake, A. Tanaka, N. Hollmann, L. H. Tjeng, A. Severing
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Journal Title
Journal of Electron Spectroscopy and Related Phenomena
Volume: 209
Pages: 1-8
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Contrasting effect of La substitution on the magnetic moment direction in the Kondo semiconductor CeT2Al10 (T = Ru, Os)2015
Author(s)
D. T. Adroja, A. D. Hillier, C. Ritter, A. Bhattacharyya, D. D. Khalyavin, A. M. Strydom,P. Peratheepan, B. Fak, M. M. Koza, J. Kawabata, Y. Yamada, Y. Okada, Y. Muro,T. Takabatake, J. W. Taylor
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Journal Title
Physical Review B
Volume: 92
Issue: 9
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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