Study on the superconducting micro-flux-jumps which successively appear around zero-field at low temperatures

• Project/Area Number: 21540357
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Shinshu University
• Principal Investigator: TENYA Kenichi 信州大学, 教育学部, 教授 (70261279)
• Co-Investigator(Renkei-kenkyūsha): AMITSUKA Hiroshi 北海道大学, 大学院・理学研究院, 教授 (40212576) ; YOKOYAMA Makoto 茨城大学, 理学部, 准教授 (70361285)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2009: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
• Keywords: 強相関電子系 / 低温物性 / 物性実験 / 超伝導材料・素子 / 異方的超伝導 / フラックスジャンプ / 磁化 / ピニング

Research Abstract

For the" superclean" single crystals of Sr_2RuO_4 and UPt_3 with spin-triplet superconductivity, tiny flux-jumps successively appear in the hysteretic magnetization around zero-field at low temperatures, unlike to the case of" superclean" single crystals in spin singlet superconductors. This suggests that the tiny flux-jumps, which successively appear in the hysteretic magnetization around zero-field, are characteristic of the spin-triplet superconductors with mobile d-domain which is related to the internal degree of freedom in the order parameter in the spin-triplet superconductors.

Research Products

• [Journal Article] Maki Parameter and Upper Critical Field of the Heavy-Fermion Superconductor UBe_<13> (2011)
  • Author(s): Y.Shimizu, Y.Ikeda, et al
  • Journal Title: Journal of the Physical Society of Japan Volume: 80 Issue: 9 Pages: 093701-093701
  • DOI: 10.1143/jpsj.80.093701
  • Peer Reviewed
• [Journal Article] Parity-violating current-voltage curves in a single domain of Sr_2RuO_4 superconductors (2010)
  • Author(s): H. Nobukane, K. Inagaki, K. Ichimura, K. Yamaya, S. Takayanagi, I. Kawasaki, K. Tenya, H. Amitsuka, K. Konno, Y. Asano, S. Tanda
  • Journal Title: Physica B Volume: 405 Issue: 11 Pages: 277-278
  • DOI: 10.1016/j.physb.2009.11.101
  • Peer Reviewed
• [Journal Article] Transport Properties in a Single Domain of Microscale Sr_2RuO_4 Single Crystals (2010)
  • Author(s): H. Nobukane, K. Inagaki, S. Tsuchiya, Y. Asano, K. Ichimura, K. Yamaya, S. Takayanagi, I. Kawasaki, K. Tenya, H. Amitsuka, S. Tanda
  • Journal Title: Jpn. J. Appl. Phys. Volume: 49 Issue: 2R Pages: 020209-020209
  • DOI: 10.1143/jjap.49.020209
  • Peer Reviewed
• [Journal Article] Transport Properties in a Single Domain of Microscale Sr_2RuO_4 Single Crystal (2010)
  • Author(s): H.Nobukane
  • Journal Title: JAPANESE JOURNAL OF APPLIED PHYSICS Volume: 49
  • Peer Reviewed
• [Journal Article] Parity-violating current-voltage curves in a single domain of Sr_2RuO_4 superconductors (2010)
  • Author(s): H.Nobukane
  • Journal Title: PHYSICAB Volume: 405 Pages: 277-278
  • Peer Reviewed
• [Journal Article] Magnetic properties around quantum critical point of CePt_<1-x> Rh_x (2009)
  • Author(s): I. Kawasaki, D. Nishikawa, H. Hidaka, T. Yanagisawa, K. Tenya, M. Yokoyama, H. Amitsuka
  • Journal Title: Physica B Volume: 404 Issue: 19 Pages: 2908-2911
  • DOI: 10.1016/j.physb.2009.07.139
  • Peer Reviewed
• [Journal Article] Effects of Co doping on antiferromagnetic structure in CeRhIn_5 (2009)
  • Author(s): M. Yokoyama, I. Kawasaki, S. Oinuma, N. Oyama, K. Tenya, H. Amitsuka
  • Journal Title: Physica B Volume: 404 Issue: 17 Pages: 2539-2542
  • DOI: 10.1016/j.physb.2009.06.014
  • Peer Reviewed
• [Journal Article] Parity violation in a single domain of spin-triplet Sr_2RuO_4 superconductors (2009)
  • Author(s): H. Nobukane, K. Inagaki, K. Ichimura, K. Yamaya, S. Takayanagi, I. Kawasaki, K. Tenya, H. Amitsuka, K. Konno, Y. Asano, S. Tanda
  • Journal Title: Solid State Commun. Volume: 149 Issue: 29-30 Pages: 1212-1215
  • DOI: 10.1016/j.ssc.2009.04.022
  • Peer Reviewed
• [Journal Article] Parity violation in a single domain of spin-triplet Sr_2RuO_4 superconductors (2009)
  • Author(s): H.Nobukane(11人中7人目)
  • Journal Title: Solid State Communications 149 Pages: 1212-1215
  • Peer Reviewed
• [Journal Article] Effects of Co doping on antiferromagnetic structure in CeRhIn_5 (2009)
  • Author(s): M.Yokoyama(6人中5人目)
  • Journal Title: Physica B 404 Pages: 2539-2542
  • Peer Reviewed
• [Journal Article] Magnetic Properties around quantum critical point of CePt_<1-χ>Rh_χ (2009)
  • Author(s): I.Kawasaki(7人中5人目)
  • Journal Title: Physica B 404 Pages: 2908-2911
  • Peer Reviewed
• [Presentation] 重い電子系超伝導体UBe_<13A>におけるGinzburg-Landauパラメーター (2010)
  • Author(s): 清水悠晴,池田陽一,天谷健一,芳賀芳範,日高宏之,柳澤達也,網塚浩
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-25
• [Presentation] 重い電子系超伝導体UBe_13におけるGinzburg-Landauパラメーター (2010)
  • Author(s): 清水悠晴
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-25
• [Presentation] SrRu_<1-x> Mn_xO_3の反強磁性絶縁体相における中性子散乱 (2010)
  • Author(s): 中田崇寛,横山淳,山路明由美,天谷健一,大山研司,佐藤卓,吉沢英樹
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-24
• [Presentation] SrRu_1-xMn_xO_3の反強磁性絶縁体相における中性子散乱 (2010)
  • Author(s): 中田崇寛
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-24
• [Presentation] Field-direction dependence of novel high-field phase in Sr_2RuO_4 (2010)
  • Author(s): K. Tenya, M. Yokoyama, H. Amitsuka, K. Deguchi, Y. Maeno
  • Organizer: International Conference on Strongly Correlated Electron Systems(SCES2010)
  • Place of Presentation: Santa Fe(U. S. A.)
  • Year and Date: 2010-07-01
• [Presentation] Magnetization in the superconducting mixed state of the heavy-fermion compound UBe_<13> (2010)
  • Author(s): Y. Shimizu, Y. Ikeda, T. Wakabayashi, K. Tenya, Y. Haga, H. Hidaka, T. Yanagisawa, H. Amitsuka
  • Organizer: International Conference on Strongly Correlated Electron Systems(SCES2010)
  • Place of Presentation: Santa Fe(U. S. A.)
  • Year and Date: 2010-07-01
• [Presentation] 重い電子系超伝導体UBe_13における基礎物性測定 (2010)
  • Author(s): 清水悠晴,池田陽一,若林琢巳,天谷健一,芳賀芳範,日高宏之,柳澤達也,網塚浩
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-21
• [Presentation] 重い電子系超伝導体UBe_<13>における基礎物性測定 (2010)
  • Author(s): 清水悠晴
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-21
• [Presentation] Magnetization and Magnetocaloric Studies on the Spin-Triplet Superconductivity in Sr_2RuO_4 (2010)
  • Author(s): K. Tenya, Y. Shimura, T. Sakakibara, M. Yokoyama, H. Amitsuka, K. Deguchi, Y. Maeno
  • Organizer: International Symposium on Physics of New Quantum Phases in Superclean Materials
  • Place of Presentation: Hamagin Hall" VIA MARE"(Yokohama)
  • Year and Date: 2010-03-10
• [Presentation] 重い電子系超伝導体UBe_<13>における超伝導熱平衡磁化測定 (2009)
  • Author(s): 清水悠晴,池田陽一,天谷健一,芳賀芳範,日高宏之,柳澤達也,網塚浩
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-27
• [Presentation] URu_2Si_2の圧力下比熱測定II (2009)
  • Author(s): 池田陽一,西川大地,田中淳,倉橋洋祐,日高宏之,柳澤達也,横山淳,天谷健一,網塚浩
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-25
• [Presentation] 単一ドメインSr_2RuO_4におけるパリティ破れの発見 (2009)
  • Author(s): 延兼啓純,稲垣克彦,市村晃一,山谷和彦,高柳滋,川崎郁斗,天谷健一,網塚浩,金野幸吉,浅野泰寛,本間龍也,丹田聡
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-25
• [Presentation] 立方晶希土類化合物R_3Pd_<20> Ge_6(R=Ce, Pr)におけるLa希釈効果 (2009)
  • Author(s): 若林琢巳,日高宏之,柳澤達也,横山淳,天谷健一,網塚浩
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-25
• [Presentation] 立方晶希土類化合物R_3Pd_<20>Ge_6 (R=Ce,Pr)におけるLa希釈効果 (2009)
  • Author(s): 若林琢巳
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-25
• [Presentation] Magnetization Study on the Spin-Triplet Superconductivity in Sr_2RuO_4 (2009)
  • Author(s): K. Tenya
  • Organizer: The International Symposium on Novel SpinPairing 2009(NSP2009)
  • Place of Presentation: Kyoto University
  • Year and Date: 2009-09-16
• [Remarks]
  • URL: http://rika.shinshu-u.ac.jp/labo/physics/01.html
• [Remarks] アウトリーチ活動(1)「サイエンスキャンプ」講師, 2011. 10. 8-9,長野市旧芋井小学校分校.,アウトリーチ活動
• [Remarks] (2)「平成23年度長野県免許法認定講習」講師, 2011. 8. 17-19,長野県総合教育センター(長野県塩尻市),アウトリーチ活動
• [Remarks] (3)『2011「青年のための科学の祭典」上田大会』ブース展示(未来の電池,おもしろエコ・エネルギーを体験しよう;ロボットを体験しよう), 2011. 8. 6-7,信州大学繊維学部,アウトリーチ活動
• [Remarks] (4)「サイエンスキャンプ」講師, 2010. 10. 9-10,長野市旧芋井小学校分校,アウトリーチ活動
• [Remarks] (5) 2010「青少年のための科学の祭典」長野大会』ブース展示(未来の電池を体験しよう;おもしろいエコ・エネルギーのいろいろ), 2010. 7. 31-8. 1,信州大学工学部,アウトリーチ活動
• [Remarks] (6)「サイエンスキャンプ」講師, 2009. 10. 10-11,長野市旧芋井小学校分校,アウトリーチ活動
• [Remarks] (7)『2009「青少年のための科学の祭典」松本大会』ブース展示(おもしろいエコ・エネルギーのいろいろ), 2009. 8. 1-2,信州大学松本キャンパス,アウトリーチ活動