Low-temperature high-sensitivity magnetization measurements on tiny single crystals of quantum magnet systems
| Project/Area Number |
24340075
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial 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 | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
MITAMURA Hiroyuki 東京大学, 物性研究所, 助教 (60282604)
KITTAKA Shunichiro 東京大学, 物性研究所, 助教 (80579805)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2014: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2013: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2012: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
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| Keywords | 量子スピン系 / 強相関電子系 / 量子相転移 / 超伝導 / 磁化測定 / 極低温 / 磁性 / 強相関系 / 分子性固体 |
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| Outline of Final Research Achievements |
Low-dimensional quantum spin systems and strongly correlated electron systems can quite often be obtained only as tiny single-crystalline samples. In this project, sensitivity of the low-temperature magnetometer, which the present principal investigator has been developed, is improved by a factor of 100 to be able to measure those tiny crystals. Some selected achievements: (1) Field and temperature variations of the magnetization of a spin 1/2 one dimensional Heisenberg antiferromagnet CuPzN are confirmed to precisely follow the predictions of the exact solutions. (2) Magnetization of a high-quality single crystal of Sr2RuO4 in a magnetic field applied exactly parallel to the c plane exhibits a sharp magnetization jump at the upper critical field at low temperatures, evidencing a first-order superconducting-normal transition. The results provide an important clue for elucidating its pairing symmetry.
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Report
(4 results)
Research Products
(62 results)
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[Journal Article] Field-induced incommensurate phase in the strong-rung spin ladder with ferromagnetic legs2014
Author(s)
H. Yamaguchi, H. Miyagai, M. Yoshida, M. Takigawa, K. Iwase, T. Ono, N. Kase, K. Araki, S. Kittaka, T. Sakakibara, T. Shimokawa, T. Okubo, K. Okunishi, A. Matsuo, and Y. Hosokoshi
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Journal Title
Phys. Rev. B
Volume: 89
Issue: 22
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Novel Electronic States of Heavy Fermion Compound YbCo2Zn202014
Author(s)
F. Honda, Y. Taga, Y. Hirose, S. Yoshiuchi, Y. Tomooka, M. Ohya, J. Sakaguchi, T. Takeuchi, R. Settai, Y. Shimura, T. Sakakibara, I. Sheikin, T. Tanaka, Y. Kubo, and Y. Onuki
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Journal Title
J. Phys. Soc. Jpn.
Volume: 83
Issue: 4
Pages: 044703-044703
DOI
NAID
Related Report
Peer Reviewed
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[Journal Article] Destruction of the Kondo effect in the cubic heavy-fermion compound Ce_3Pd_<20>Si_62012
Author(s)
J. Custers, K-A. Lorenzer, M. Muller, A. Prokofiev, A. Sidorenko, H. Winkler, A. M. Strydom, Y. Shimura, T. Sakakibara, R. Yu, Q. Si and S. Paschen
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Journal Title
Nat. Mater
Volume: 11
Issue: 3
Pages: 189-194
DOI
Related Report
Peer Reviewed
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[Presentation] Superconducting and Antiferroquadrupolar Transitions in Isoelectronic Caged Compounds PrT2Zn20(T=Co, Rh, and Ir)
Author(s)
T. Onimaru, K. Matsumoto, N. Nagasawa, K. Wakiya, Y. Obayashi, Y. Shimada, Y. Inoue, K. Umeo, S. Kittaka, T. Sakakibara, Y. Karaki, K. Minoru, Y. Matsushita, T. Takabatake
Organizer
The International conference on Strongly Correlated Electron Systems(SCES2013)
Place of Presentation
The University of Tokyo（東京都）
Related Report
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