2013 Fiscal Year Final Research Report
Studies of dissipative state in non-Kramers system Pr-based compounds
| Project/Area Number |
24840013
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics II
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| Research Institution | The University of Tokyo |
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Principal Investigator |
ARAKI Koji 東京大学, 物性研究所, 研究員 (00635013)
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| Project Period (FY) |
2012-08-31 – 2014-03-31
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| Keywords | 非クラマース二重項 / 多極子 / 四極子秩序 / 超音波 / 磁化 |
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| Research Abstract |
Ultrasonic measurements on PrMg3 reveals that the magnetic field dependence of elastic constant (C11-C12)/2 shows strong magnetic anisotropy. We obtained small Gruneisen constant of 5 for PrMg3 at low temperatures from low-temperature thermal expansion measurements. This result implies that PrMg3 has sermonic quasiparticles with small density of states. We have also performed specific heat and magnetization measurements on PrV2Al20. Our measurements reveals that PrV2Al20 exhibits two-phase transition at TQ = 0.73 K and T* = 0.61 K at zero field. We describe a T-H phase diagram in the three principal directions. It should be emphasized that high field phase exists in only [100] field direction. We proposed that the high field phase is due to the switching from the electric quadrupole O20 phase to O22 phase assisted by the octupole moment.
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[Journal Article] Fine-Tuning of Magnetic Interactions in Organic Spin Ladders2014
Author(s)
Hironori Yamaguchi, Hirotsugu Miyagai, Tokuro Shimokawa, Kenji Iwase, Toshio Ono, Yohei Kono, Naoki Kase, Koji Araki, Shunichiro Kittaka, Toshiro Sakakibara, Takashi Kawakami, Kouichi Okunishi, and Yuko Hosokoshi
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Journal Title
J. Phys. Soc. Jpn.
Volume: 83
Pages: 33707 (1-4)
DOI
Peer Reviewed
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[Presentation] 4倍周期磁気構造を持つ新規一次元磁性体の低温物性2013
Author(s)
山口博則, 小野俊雄, 木田孝則, 萩原政幸, 大久保毅, 松尾晶, 金道浩一, 荒木幸治, 橘高俊一郎, 榊原俊郎, 細越裕子
Organizer
日本物理学会2013年秋季大会
Place of Presentation
徳島大学 (徳島県)
Year and Date
2013-09-28
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[Presentation] URu_2Si_2のパルス磁場中の超音波測定2013
Author(s)
吉澤正人, シャラムジャン・スマイ, 坂野幸平, 中西良樹, 三田村裕幸, 荒木幸治, 榊原敏郎, 金道浩一, 本間佳哉, 山本悦嗣, 松田琢磨, 芳賀芳範, 大貫惇睦
Organizer
日本物理学会第68回年次大会
Place of Presentation
広島大学 (広島県)
Year and Date
2013-03-26
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[Presentation] 強磁性鎖から成る新規梯子格子磁性体の低温物性2013
Author(s)
山口博則, 宮外浩嗣, 小野敏雄, 下川統久朗, 川上貴資, 志村恭通, 加瀬直樹, 荒木幸治, 橘高俊一郎, 榊原俊郎, 細越裕子
Organizer
日本物理学会第68回年次大会
Place of Presentation
広島大学 (広島県)
Year and Date
2013-03-26
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[Presentation] 非クラマース二重項基底を持つPrMg_3の極低温磁化2012
Author(s)
荒木幸治, 榊原俊郎, 志村恭通, 後藤輝孝, 根本祐一, 赤津光洋, 三本啓輔, 鈴木博之, 谷田博司, 高木滋, Shadi Yasin, Sergei Zherlitsyn, and Joachim Wosnitza
Organizer
日本物理学会2012年秋季大会
Place of Presentation
横浜国立大学 (神奈川県)
Year and Date
2012-09-20
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