Quantum Magnetism of Triangular-Ring Based Nano Magnetic Clusters

2010 Fiscal Year Self-evaluation Report

• Project/Area Number: 20244052
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: NOJIRI Hiroyrki Tohoku University, 金属材料研究所, 教授 (80189399)
• Project Period (FY): 2008 – 2010
• Keywords: 強磁場 / 量子ダイナミクス / 分子磁性 / コヒーレンス / フラストレーション

Research Abstract

三角スピンリングは量子自由度としてのスピンカイラリティを有し、これから構成される三角リング結合ナノ磁性クラスターは、カイラリティ自由度のあるフラストレートした多様なネットワークの量子系として、ユニークである。本研究では、ナノ磁性体研究における以下の3点のブレークスルーを目指す。
(1)スピン多面体の基底状態の解明と量子-古典移行の検証
(2)量子自由度としてのスピンカイラリティの制御
(3)量子トンネルにおける量子干渉の検証

Research Products

• [Journal Article] Single-Molecule Magnet Behavior Enhanced by Magnetic Coupling between 4f-3d Spins (2011)
  • Author(s): Okazawa T, Nojiri H, T.Ishida
  • Journal Title: Polyhedron in print
  • Peer Reviewed
• [Journal Article] High Magnetic Field Micro-Calorimeter and Application for BE-Condensation of Cr^<5+> Dimer System (2010)
  • Author(s): Zenmoto T, Oshima Y, Nojiri H, Lee SH, Kofu M
  • Journal Title: J.Low.Temp.Phys. 159 Pages: 118-121
  • Peer Reviewed
• [Journal Article] Observation of Elementary Excitations of Quantum Sine-Gordon Spin System KCuGaF_6 Under High Magnetic Field (2010)
  • Author(s): Umegaki I, Tanaka H, Ono T, Nojiri H
  • Journal Title: J.Low.Temp.Phys. 159 Pages: 60-63
  • Peer Reviewed
• [Journal Article] Heat Capacity Reveals the Physics of a Frustrated Spin Tube (2010)
  • Author(s): Ivanov NB, Schnack J, Sgcballe R, Richter J, Koeglerler P, Newton GN, Cronin L, Oshima Y, Nojiri, H
  • Journal Title: Phys.Rev.Lett. 105 Pages: 037206-1-4
  • Peer Reviewed
• [Journal Article] Magnetic-Field Induced Phase Transitions in a Weakly Coupled s=1/2 Quantum Spin Dimer System Ba_3Cr_2O_8 (2009)
  • Author(s): Kofu M, Ueda H, Nojiri H, Oshima Y, Zenmoto T, Rule KC, Gerischer S, Lake B, Batista CD, Ueda Y, Lee SH
  • Journal Title: Phys.Rev.Lett. 105 Pages: 177204-1-4
  • Peer Reviewed
• [Journal Article] Structure and Magnetism of [n-BuNH_3]_<12>[Cu_4(GeW_9O_<34>)_2]・14H_2O Sandwiching a Rhomblike Cu^<48+> Tetragon through r-Keggin Linkage (2009)
  • Author(s): T.Yamase, Abe H, Ishiawa E, Nojiri H, Oshima Y
  • Journal Title: Inorg.Chem. 48 Pages: 138-148
  • Peer Reviewed
• [Journal Article] External Magnetic Field Effects on a Distorted Kagome Antiferromagnet (2008)
  • Author(s): Kim JH, Ji S, Lee SH, Lake B, Yildirim T, Nojiri H, Kikuchi H, Habicht K, Qiu Y, Klefer K
  • Journal Title: Phys.Rev.Lett. 101 Pages: 107201.1-4
  • Peer Reviewed
• [Journal Article] Magnetic Transitions and Spin Dynamics in the 3d(1) System K_2NaCrO_8 Investigated by Magnetization and Na-23 NMR (2008)
  • Author(s): Choi KY, Nellutia S, Reyes AP, Kuhns PL, Jo YJ, Balicas L, Nojiri H, Pari M, Dalal NS
  • Journal Title: Phys.Rev.B 78 Pages: 214419.1-6
  • Peer Reviewed
• [Presentation] Adiabatic Transition in Fast Sweeping Magnetic Fields (2010)
  • Author(s): H.Nojiri
  • Organizer: International Workshop on Statistical Physics of Quantum Systems
  • Place of Presentation: Tokyo, Japan, Invited.
  • Year and Date: 20100802-20100804
• [Presentation] Triangular Based Molecular Magnets, Spin State Transition and Magnetic Coupling (2010)
  • Author(s): H.Nojiri
  • Organizer: Leverhulme Meeting on Molecular Magnetism
  • Place of Presentation: Manchester, UK, Invited.
  • Year and Date: 20100719-20100721
• [Presentation] Gapped and Gapless modes in 3D coupled dimmer systems (2009)
  • Author(s): H.Nojiri
  • Organizer: Electron Magnetic Resonance of Strongly Correlated Spin Systems
  • Place of Presentation: Kobe, Japan, Invited.
  • Year and Date: 2009-11-08
• [Presentation] Branching of spin reversal with Isotropic and Anisotropic Interactions (2009)
  • Author(s): H.Nojiri
  • Organizer: Dynamics and manipulation of quantum spin systems
  • Place of Presentation: Tokyo, Japan, Invited.
  • Year and Date: 2009-10-15
• [Remarks] ホームページ
  • URL: http://www.hfpm.imr.tohoku.ac.jp/