2012 Fiscal Year Final Research Report
Physical Properties of Actinoid compounds explored by ultrasonic measurements
| Project/Area Number |
22654037
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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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 | Iwate University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
HAGA Yoshinori (独)日本原子力研究開発機構, 先端基礎研究センター, 主任研究員 (90354901)
HONMA Yoshiya 東北大学, 金属材料研究所, 助教 (00260448)
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| Project Period (FY) |
2010 – 2012
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| Keywords | ウラン化合物 / 超音波物性 / 低温 / 強磁場 |
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| Research Abstract |
We have investigated the elastic properties of UR_<u2>Si_2 by using ultrasonic measurements in the pulsed magnetic field. The elastic constant C_E=(C_<11>-C_<12>)/2 shows characteristic softening towards low temperatures as a function of temperature. The softening disappears beyond 36 T of the quantum critical point in this system. It is very similar to that of C_<66> in iron-based superconductor Ba(Fe_<1-x>Co_x)2A_<s2>. This fact suggests strongly that C_E is correlated with the formation of hidden order.
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Research Products
(21 results)
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[Journal Article] Elastic Anomalies Associated with superconducting phase transitions in Iron-based Superconductor Ba(Fe_(1-x)Co_x)_2As_22012
Author(s)
A. Ismayil, R. Kamiya, R. Onodera, D. Kimura, T. Chiba, Y. Nakanishi, K. Kihou, M. Nakajima, C. H. Lee, A. Iyo, H. Eisaki, S. Uchida, and M. Yoshizawa
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Journal Title
J. Phys.: Conf. Ser
Volume: 400
Pages: 022037(4)
DOI
Peer Reviewed
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[Journal Article] Structural Quantum Criticality and Superconductivity in Iron-Based Superconductor Ba(Fe_<1-x>Co_x)_2As_22012
Author(s)
M. Yoshizawa, D. Kimura, T. Chiba, S. Simayi, Y. Nakanishi, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, M. Nakajima, S. Uchida
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Journal Title
J. Phys. Soc. Jpn
Volume: 81
Pages: 024604(6)
DOI
Peer Reviewed
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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] 鉄系超伝導体Ba(Fe_<1-x>Co_x)_2As_2の比熱とグリュンナイゼン定数2012
Author(s)
吉澤正人, 竹澤 遼, 坂野幸平, シャラムジャン・スマイ, 中村光輝, 中西良樹, 木方邦宏, 李 哲虎, 伊豫 彰, 永崎 洋, 中島正道, 内田慎一
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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[Presentation] Quantum Criticality and Superconductivity in Ba(Fe_<1-x>Co_x)_2As_2 Investigated by Ultrasonic Measurements2011
Author(s)
M. Yoshizawa, D. Kimura, T. Chiba, A. Ismayil, Y. Nakanishi, K. Kihou, M. Nakajima, C. H. Lee, A. Iyo, H. Eisaki, and S. Uchida
Organizer
26th International Conference on Low Temperature Physics (LT26)
Place of Presentation
Beijing International Convention Center (BICC)(中国)[招待講演]
Year and Date
2011-08-16
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[Presentation] Ultrasonic measurements of iron pnictide superconductor Ba(Fe_<1-x>Co_x)_2As_2 single crystals2011
Author(s)
D. Kimura, T. Chiba, R. Kamiya, A. Ismayil, Y. Nakanishi, M. Nakamura, M. Yoshizawa, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, M. Nakajima, S. Uchida
Organizer
International Workshop on Novel Superconductors and Super Materials 2011 (NS2011)
Place of Presentation
日本科学未来館(東京都)
Year and Date
2011-03-07
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[Presentation] Large elastic softening and orbital order in iron-based superconductor Ba(Fe_<1-x>Co_x)_2As_22011
Author(s)
M. Yoshizawa, D. kimura, T. Chiba, R. Kamiya, A. Ismayil, R. Onodera, Y. Nakanishi, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, M. Nakajima, S. Uchida
Organizer
International Workshop on Novel Superconductors and Super Materials 2011 (NS2011)(招待講演)
Place of Presentation
日本科学未来館(東京都)
Year and Date
2011-03-06
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