Physical Properties of Actinoid compounds explored by ultrasonic measurements

2012 Fiscal Year Final Research Report

• Project/Area Number: 22654037
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Iwate University
• Principal Investigator: YOSHIZAWA Masahito 岩手大学, 工学研究科, 教授 (30220619)
• 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)
• Project Period (FY): 2010 – 2012
• Keywords: ウラン化合物 / 超音波物性 / 低温 / 強磁場

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.

Research Products

• [Journal Article] High-Field Phase Diagram of SmRu_4P_(12) Determined by Ultrasonic Measurements in Pulsed Magnetic Field up to 55 T (2013)
  • Author(s): M. Yoshizawa, H. Mitamura, F. Shichinomiya, S. Fukuda, Y. Nakanishi, H. Sugawara, T. Sakakibara, and K. Kindo
  • Journal Title: J. Phys. Soc. Jpn Volume: 82 Pages: 033602(5)
  • DOI: DOI:10.7566/JPSJ.82.033602
  • Peer Reviewed
• [Journal Article] Elastic Anomalies Associated with superconducting phase transitions in Iron-based Superconductor Ba(Fe_(1-x)Co_x)_2As_2 (2012)
  • 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
  • Journal Title: J. Phys.: Conf. Ser Volume: 400 Pages: 022037(4)
  • DOI: DOI:10.1088/1742-6596/400/2/022037
  • Peer Reviewed
• [Journal Article] 柔らかくなるほど高くなる超伝導体転移温度 ー鉄系超伝導体における超伝導と構造揺らぎの不思議な関係ー (2012)
  • Author(s): 吉澤正人
  • Journal Title: 固体物理 Volume: 47 Pages: 309-319
  • URL: http://www.agne.co.jp/kotaibutsuri/kota1047.htm#no557
• [Journal Article] Anomalous elastic behavior and its correlation with superconductivity in iron-based superconductor Ba(Fe_<1-x>Cox)_2As_2 (2012)
  • Author(s): M. Yoshizawa, and S. Simayi
  • Journal Title: Modern Phys. Lett. B Volume: 26 Pages: 1230011(23)
  • DOI: DOI:10.1142/S0217984912300116
• [Journal Article] Large elastic anomalies and strong electron-lattice coupling in iron-based superconductor Ba(Fe_<1-x>Co_x)_2As_2 (2012)
  • Author(s): M. Yoshizawa, S. Simayi, K. Sakano, Y. Nakanishi, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, M. Nakajima, S. Uchida
  • Journal Title: Solid State Commun Volume: 152 Pages: 680-687
  • DOI: DOI:10.1016/j.ssc.2011.12.006
  • Peer Reviewed
• [Journal Article] Structural Quantum Criticality and Superconductivity in Iron-Based Superconductor Ba(Fe_<1-x>Co_x)_2As_2 (2012)
  • 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
  • Journal Title: J. Phys. Soc. Jpn Volume: 81 Pages: 024604(6)
  • DOI: DOI:10.1143/JPSJ.81.024604
  • Peer Reviewed
• [Journal Article] Elastic Anomalies of TbB_4 in Pulsed High Magnetic Fields (2011)
  • Author(s): T. K. Fujita, M. Yoshizawa, R. Kamiya, T. Sakakibara, K. Kindo, F. Iga, I. Lshii and T. Suzuki
  • Journal Title: J. Phys, Soc. Jpn Volume: 80 Pages: SA084(3)
  • DOI: DOI:10.1143/JPSJS.80SA.SA084
  • Peer Reviewed
• [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
• [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
• [Presentation] Anomalous elastic properties in the iron-based superconductors Ba(Fe_<1-x>Co_x)_2As_2 and Fe(Se1-xTex) (2012)
  • Author(s): M. Yoshizawa
  • Organizer: 2012 Materials & Mechanisms of Superconductivity Conference (M^2S 2012)
  • Place of Presentation: ワシントンDC(米国)(招待講演)
  • Year and Date: 2012-08-02
• [Presentation] Large elastic softening in heavy fermion superconductor Rh_<17>S_<15> (2012)
  • Author(s): S. Simayi, M. Yoshizawa, K. Sakano, Y. Nakanishi, R. Settai, Y. Onuki
  • Organizer: International conference on heavy electrons and novel quantum phases
  • Place of Presentation: 慶州(韓国)
  • Year and Date: 2012-07-07
• [Presentation] 鉄系超伝導体の弾性的性質 (2012)
  • Author(s): 吉澤正人
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学26pYD-7[シンポジウム講演](大阪府)
  • Year and Date: 2012-03-26
• [Presentation] Large elastic softening in heavy fermion superconductor Rh_<17>S_<15> (2012)
  • Author(s): Abdusalam Ismayil, 坂野幸平, 小関玄, 小関実, 中西良樹, 大貫惇睦, 摂待力生, 吉澤正人
  • Organizer: 本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学 25aYH-4(大阪府)
  • Year and Date: 2012-03-25
• [Presentation] 超音波測定における鉄系超伝導体Fe_<1.03>Te_<0.8>Se_<0.2>の弾性特性 (2012)
  • Author(s): 坂野幸平,中西良樹, 吉澤正人, 小鹿優太, 川田桂輔, 渡辺孝夫
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学25aPS-84(大阪府)
  • Year and Date: 2012-03-25
• [Presentation] Elastic properties of iron-based superconductor (2011)
  • Author(s): M. Yoshizawa
  • Organizer: 24th International Symposium on Superconductivity (ISS2012)
  • Place of Presentation: Tokyo(東京都)[招待講演]
  • Year and Date: 2011-10-25
• [Presentation] Quantum Criticality and Superconductivity in Ba(Fe_<1-x>Co_x)_2As_2 Investigated by Ultrasonic Measurements (2011)
  • 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
• [Presentation] Ultrasonic measurements of iron pnictide superconductor Ba(Fe_<1-x>Co_x)_2As_2 single crystals (2011)
  • 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
• [Presentation] Large elastic softening and orbital order in iron-based superconductor Ba(Fe_<1-x>Co_x)_2As_2 (2011)
  • 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
• [Presentation] SmRu_4P_<12>のパルス磁場中の弾性定数測定 (2010)
  • Author(s): 吉澤正人、七宮史崇、三田村裕幸、中西良樹、菅原仁、榊原俊郎、金道浩一、佐藤英行
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学(大阪府)
  • Year and Date: 2010-09-23
• [Presentation] YbAl_3C_3のパルス磁場中超音波測定 (2010)
  • Author(s): 七宮史崇、吉澤正人、三田村裕幸、中西良樹、小坂昌史、榊原俊郎、金道浩一
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学(大阪府)
  • Year and Date: 2010-09-23
• [Presentation] Elastic anomalies of TbB_4 in pulsed high magnetic fields (2010)
  • Author(s): T. K. Fujita, M. Yoshizawa, R. Kamiya, H. Mitamura, T. Sakakibara, K. Kinodo and F. Iga
  • Organizer: International Conference on Heavy Electrons 2010
  • Place of Presentation: Minami-Osawa Campus, Tokyo Metropolitan University(東京都)
  • Year and Date: 2010-09-19