| Project/Area Number |
26400342
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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 | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
AMITSUKA Hiroshi 北海道大学, 理学研究院, 教授 (40212576)
HIDAKA Hiroyuki 北海道大学, 理学研究院, 助教 (90466459)
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| Research Collaborator |
Maple M. Brian カリフォルニア大学サンディエゴ校, 物理学科, 教授
Zherlitsyn S. ドレスデン強磁場研究所, 強磁場技術研究基盤部門長
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 超音波 / 弾性定数 / カゴ状化合物 / 重い電子系 / 多極子 / 静水圧力 / パルス磁場 / 強相関電子系 / 物性実験 / 低温物性 / 磁性 / 国際情報交換 / アクチノイド / アメリカ：ドイツ：チェコ |
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| Outline of Final Research Achievements |
Crystalline electric field (CEF) ground state of SmOs_4Sb_12, which shows magnetic field robust heavy fermion state, is determined as Gamma_67 by ultrasonic measurements under pulsed-magnetic field. Further, the results of ultrasonic measurements under hydrostatic pressure on this compound strongly suggests that a magnetic octupolar interaction plays an important role in the low-temperature magnetic ordered phase in SmOs_4Sb_12.
On the other hand, the elastic constant (C_11-C_12)/2 of a new cage-structural compound PrNi_2Cd_20, which was grown at Maple group in University of California San Diego, is observed down to 30 mK. It is clarified that this system has Gamma_3 non-Kramers doublet CEF ground state.
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