Development of muon-spin-relaxation measurement system under low-energy phonon-induced states

• Project/Area Number: 19740187
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics I
• Research Institution: The Institute of Physical and Chemical Research
• Principal Investigator: SUZUKI Takao The Institute of Physical and Chemical Research, 岩崎先端中間子研究室, 協力研究員 (40327862)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥2,870,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2007: ¥1,700,000 (Direct Cost: ¥1,700,000)
• Keywords: X線・粒子線 / ミュオンスピン緩和 / 超音波 / ミュオン

Research Abstract

加速器から出されるチェレンコフ・トリガに同期させる形で高周波ロングパルスを出力する高周波系を構築し、さらに、大型の試料(Φ6×20 mm)を固定して超音波を励起し、試料部分にのみミュオンビームを当てるための高周波実験に対応した特殊なプローブを完成させた。
次のステップとして、試料をプローブにセットした状態でヘリウム冷凍機で冷却試験を行い、ヘリウム温度での超音波印加を確認し、実際の測定を試験的に行った。崩壊ミュオンを効率的に試料内部に入れてS/N比の高い測定が可能であることを実証した。

Research Products

• [Journal Article] Bond-randomness effect on the quantum spin system Tl_<1-x>K_xCuCl_3 probed by muon-spin-relaxation method (2009)
  • Author(s): T. Suzuki, F. Yamada, I. Watanabe, T. Goto A. Oosawa, H. Tanaka
  • Journal Title: Physica B 404 Pages: 590-593
  • Peer Reviewed
• [Journal Article] μSR detected soft mode toward a possible phase transition in a disordered spin-gap system, (CH_3)_2CHNH_3-Cu(Cl_xBr_<1-x>)_3 (2009)
  • Author(s): T. Goto, T. Suzuki, I. Watanabe, K. Kanada, T. Saito, A. Oosawa, H. Manaka
  • Journal Title: Physica B 404 Pages: 594-596
  • Peer Reviewed
• [Journal Article] Quantum critical behavior in highly random systems Tl_<1-x>K_xCuCl_3 probed by zero- and longitudinal-field muon-spin-relaxation measurements (2009)
  • Author(s): T. Suzuki, F. Yamada, T. Kawamata, I. Watanabe, T. Goto, H. Tanaka
  • Journal Title: Phys. Rev. B 79
  • Peer Reviewed
• [Journal Article] Bond-randomness effect on the quantum spin system Tl1-xKxCuCl3 probed by muon-sp in-relaxation method (2009)
  • Author(s): Takao Suzuki
  • Journal Title: Physica B: Physics of Condensed Matter (in press) Pages: 4-4
  • Peer Reviewed
• [Journal Article] Quantum critical behavior in highly random systems Tl1-xKxCuCl3 probed by zero- and longitudinal-field muon-spin-relaxation (μSR) measurements (2009)
  • Author(s): Takao Suzuki
  • Journal Title: Physical Review B (in press) Pages: 5-5
  • Peer Reviewed
• [Journal Article] Pressure-induced reentrant oblique antiferromagnetic phase in the spin-dimer system TlCuCl_3 (2008)
  • Author(s): F. Yamada, Y. Ishii, T. Suzuki, T. Matsuzaki, H. Tanaka
  • Journal Title: Phys. Rev. B 78
  • Peer Reviewed
• [Journal Article] Muon spin relaxation detection of the soft mode toward the exotic magnetic ground state in the bond-disordered quantum spin system IPA-Cu(Cl_<0.35>Br_<0.65>)_3 (2008)
  • Author(s): T. Goto, T. Suzuki, K. Kanada, T. Saito, A. Oosawa, I. Watanabe, H. Manaka
  • Journal Title: Phys. Rev. B 78
  • Peer Reviewed
• [Journal Article] Pressure-induced reentrant oblique antiferromagnetic phase in the spin-dimer system TICuCl3 (2008)
  • Author(s): Fumiko Yamada
  • Journal Title: Physical Review B 78
  • Peer Reviewed
• [Presentation] Bond-randomness effect on the quantum spin systemTl_1-x>K_xC_uCl_3 probed by muon-spin-relaxation method International Conference on Muon Spin Rotation (2008)
  • Author(s): T. Suzuki, F. Yamada, I. Watanabe, T. Goto, A. Oosawa, H. Tanaka
  • Organizer: Relaxation and Resonance (muSR2008)
  • Place of Presentation: Tsukuba, Japan
• [Presentation] Tl(Cu_<1-x>Mg_x)Cl_3 (x=0.0047)におけるμSR法で見たスピン揺らぎ (2008)
  • Author(s): 鈴木栄男, 山田文子, 渡邊功雄, 大沢明, 後藤貴行, 田中秀数
  • Organizer: 日本物理学会第63回年次大会
  • Place of Presentation: 近畿大学
• [Presentation] 量子スピン系Tl_<1-x>K_xCuCl_3(x=0.20, 0.44, 0.58)におけるミュオンスピン緩和(μSR)測定 (2008)
  • Author(s): 鈴木栄男, 渡邊功雄, 後藤貴行, 山田文子, 田中秀数
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
• [Presentation] 量子スピン系Tl_<1-x>K_xCuCl_3(x=0.51, 0.60)におけるミュオンスピン緩和(μSR)とソフトモード (2008)
  • Author(s): 鈴木栄男, 川股隆行, 渡邊功雄, 後藤貴行, 山田文子, 田中秀数
  • Organizer: 日本物理学会第64回年次大会
  • Place of Presentation: 立教大学