Studies on Spin Ground States of Cubic-Symmetry Single-Molecule Magnets

2013 Fiscal Year Final Research Report

• Project/Area Number: 23550076
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Inorganic chemistry
• Research Institution: Osaka University
• Principal Investigator: NAKANO Motohiro 大阪大学, 理学(系)研究科(研究院), 教授 (00212093)
• Project Period (FY): 2011 – 2013
• Keywords: 単一分子磁石 / スピンハミルトニアン / 磁気異方性 / 高対称性分子 / 常磁性多核錯体 / トンネル分裂

Research Abstract

Recently several cube-shaped single-molecule magnets (SMM) were reported, most of which have exact cubic symmetry (Oh). The magnetic anisotropy in conventional SMMs is uniaxial and incompatible with higher point symmetry like Oh. The highly degenerate spin ground states are studied based on the classical vector picture and the giant-spin approximation.
Giant spin ground states in cube-shaped SMMs were subjected to Oh quartic anisotropy, and eight or six lowest levels, which correspond to a set of equivalent classical stable directions, are well-isolated by an energy gap growing as ~S4.
Fine-splitting patterns of lowest levels showed longer-period modulations with increasing 2S+1, in addition to odd-even effect expected for Kramers/non-Kramers ground states. These splittings should correspond to tunnel splitting of semiclassical giant spins trapped in the anisotropy wells.

Research Products

• [Journal Article] Ferromagnetic Interaction and Slow Magnetic Relaxation in a Co3 Cluster-Based Three-Dimensional Framework (2014)
  • Author(s): B.-Y. Wu, C.-I Yang, M. Nakano, and G.-H. Lee
  • Journal Title: Dalton Trans Volume: 43 Pages: 47-50
  • DOI: 10.1039/C3DT51997J
  • Peer Reviewed
• [Journal Article] A Semi-Flexible Aminotriazine-Based Bis-methylpyridine Ligand for the Design of Nickel(II) Spin Clusters (2014)
  • Author(s): Y.-W. Tzeng, C.-J. Lin, M. Nakano, C.-I Yang, W.-L. Wan, and L.-L. Lai
  • Journal Title: Dalton Trans Volume: 43 Pages: 3044-3047
  • DOI: 10.1039/C3DT52903G
  • Peer Reviewed
• [Journal Article] A Luminescent Single-Molecule Magnet : Observation of Magnetic Anisotropy Using Emission as a Probe (2013)
  • Author(s): K. Yamashita, R. Miyazaki, Y. Kataoka, T. Nakanishi, Y. Hasegawa, M. Nakano, T. Yamamura, and T. Kajiwara
  • Journal Title: Dalton Trans Volume: 42 Pages: 1987-1990
  • DOI: 10.1039/c2dt32785f
  • Peer Reviewed
• [Journal Article] Copper Complexes of the Non-Innocent β-Diketiminate Ligand Containing Phenol Groups (2013)
  • Author(s): J. Takaichi, K. Ohkubo, H. Sugimoto, M. Nakano, D. Usa, H. Maekawa, N. Fujieda, N. Nishiwaki, S. Seki, S. Fukuzumi, and S. Itoh
  • Journal Title: Dalton Trans Volume: 42 Pages: 2438-2444
  • DOI: 10.1039/c2dt32413j
  • Peer Reviewed
• [Journal Article] Linear Trinuclear Zn(II)-Ce(III)-Zn(II) Complex Which Behaves as a Single-Molecule Magnet (2013)
  • Author(s): S. Hino, M. Maeda, K. Yamashita, Y. Kataoka, M. Nakano, T. Yamamura, H. Nojiri, M. Kofu, O. Yamamuro, and T. Kajiwara
  • Journal Title: Dalton Trans Volume: 42 Pages: 2683-2686
  • DOI: 10.1039/c2dt32812g
  • Peer Reviewed
• [Journal Article] High-Field Optical Spectroscopy of the Spin-Crossover Complex [Mn^III(taa)] (2013)
  • Author(s): Y. Sawada, S. Kimura, K. Watanabe, and M. Nakano
  • Journal Title: J. Low Temp. Phys Volume: 170 Pages: 424-429
  • DOI: 10.1007/s10909-012-0750-0
  • Peer Reviewed
• [Journal Article] SMM Behavior Observed in Ce(III)Zn(II)2 Linear Trinuclear Complex (2013)
  • Author(s): S. Hino, M. Maeda, Y. Kataoka, M. Nakano, T. Yamamura, and T. Kajiwara
  • Journal Title: Chem. Lett Volume: 42 Pages: 1276-1278
  • DOI: 10.1246/cl.130602
  • Peer Reviewed
• [Journal Article] Hyperfine Structure of Magnetic Excitations in a Tb-Based Single-Molecule Magnet Studied by High-Resolution Neutron Spectroscopy (2013)
  • Author(s): M. Kofu, O. Yamamuro, T. Kajiwara, Y. Yoshimura, M. Nakano, K. Nakajima, S. Ohira-Kawamura, T. Kikuchi, and Y. Inamura
  • Journal Title: Phys. Rev. B Volume: 88 Pages: 064405
  • DOI: 10.1103/PhysRevB.88.064405
  • Peer Reviewed
• [Journal Article] Magnetic Relaxations in a Tb-Based Single Molecule Magnet Studied by Quasielastic Neutron Scattering (2013)
  • Author(s): M. Kofu, T. Kajiwara, J. S. Gardner, G. G. Simeoni, M. Tyagi, A. Faraone, K. Nakajima, S. Ohira-Kawamura, M. Nakano, and O. Yamamuro
  • Journal Title: Chem. Phys Volume: 427(12) Pages: 147-152
  • DOI: 10.1016/j.chemphys.2013.10.004
  • Peer Reviewed
• [Journal Article] Syntheses, Structures, and Magnetic Properties of Discrete Cyano-Bridged Heterodinuclear Complexes Composed of Mn^III(salen)-Type Complex and M^III(CN)_6 Anion (M^III = Fe, Mn, and Cr) (2013)
  • Author(s): R. Ishikawa, M. Nakano, B. K. Breedlove, and M. Yamashita
  • Journal Title: Polyhedron Volume: 64(12) Pages: 346-351
  • DOI: 10.1016/j.poly.2013.06.012
  • Peer Reviewed
• [Journal Article] Update 1 of : Calorimetric Investigation of Phase Transitions Occurring in Molecule-based Magnets (2013)
  • Author(s): M. Sorai, Y. Nakazawa, M. Nakano, and Y. Miyazaki
  • Journal Title: Chem. Rev Volume: 113 Pages: PR41-PR122
  • DOI: 10.1021/cr300156s
  • Peer Reviewed
• [Journal Article] Magnetic and Spectroscopic Characterizations of High-Spin Cobalt(II) Complex with Soft-Scorpionate Ligand (2012)
  • Author(s): H. Baba and M. Nakano
  • Journal Title: Inorg. Chem. Commun Volume: 17 Pages: 177-179
  • DOI: 10.1016/j.inoche.2012.01.003
  • Peer Reviewed
• [Journal Article] Magnetic Field-Induced Spin-Crossover Transition in [Mn^III(taa)] Studied by X-Ray Absorption Spectroscopy (2012)
  • Author(s): Spectroscopy, J. L. Her, Y. H. Matsuda, M. Nakano, Y. Niwa, and Y. Inada
  • Journal Title: J. Appl. Phys Volume: 111 Pages: 053921
  • DOI: 10.1063/1.3691608
  • Peer Reviewed
• [Journal Article] Correlation between Slow Magnetic Relaxation and the Coordination Structures of a Family of Linear Trinuclear Zn(II)-Ln(III)-Zn(II) Complexes (Ln = Tb, Dy, Ho, Er, Tm and Yb) (2012)
  • Author(s): M. Maeda, S. Hino, K. Yamashita, Y. Kataoka, M. Nakano, T. Yamamura, and T. Kajiwara
  • Journal Title: Dalton Trans Volume: 41 Pages: 13640-13648
  • DOI: 10.1039/c2dt31399e
  • Peer Reviewed
• [Journal Article] Observation of Two Types of Magnetization Relaxation in a Weakly Correlated Antiferromagnetic Chain of Mn^III _2 Single-Molecule Magnets (2012)
  • Author(s): Observation of Two Types of Magnetization Relaxation in a Weakly Correlated Antiferromagnetic Chain of MnIII 2 Single-Molecule Magnets
  • Journal Title: Dalton Trans Volume: 41 Pages: 13691-13696
  • DOI: 10.1039/c2dt31444d
  • Peer Reviewed
• [Journal Article] 誘電応答と磁場応答でみたマンガン(III)スピンクロスオーバー錯体の相転移挙動 (2011)
  • Author(s): 中野 元裕
  • Journal Title: Bull. Jpn. Soc. Coord. Chem Volume: 58 Pages: 6-19
  • DOI: 10.4019/bjscc.58.6
  • Peer Reviewed
• [Journal Article] Magnetic Properties of Cobalt(II / III) Complexes with Sulfur-Scorpionate Ligands (2011)
  • Author(s): H. Baba and M. Nakano
  • Journal Title: Polyhedron Volume: 30(18) Pages: 3182-3185
  • DOI: 10.1016/j.poly.2011.03.037
  • Peer Reviewed
• [Journal Article] Crystal Packing Effects within [Mn^III _3O]^<7+> Single-Molecule Magnets : Controlling Intermolecular Antiferromagnetic Interactions (2011)
  • Author(s): C.-I. Yang, K.-H. Cheng, S.-P. Hung, M. Nakano, and H.-L. Tsai
  • Journal Title: Polyhedron Volume: 30(18) Pages: 3272-3278
  • DOI: 10.1016/j.poly.2011.05.030
  • Peer Reviewed
• [Journal Article] Magnetic Anisotropies in Paramagnetic Polynuclear Metal Complexes (2011)
  • Author(s): M. Nakano and H. Oshio
  • Journal Title: Chem. Soc. Rev Volume: 40(6) Pages: 3239-3248
  • DOI: 10.1039/c0cs00223b
  • Peer Reviewed
• [Presentation] Degeneracy Lifting of Spin Ground States in Cubic-Symmetry Single-Molecule Magnets (2012)
  • Author(s): Motohiro Nakano
  • Organizer: The 13th International Conference on Molecule-based Magnets (ICMM2012)
  • Place of Presentation: Orlando, U.S.A
  • Year and Date: 20121007-11
• [Book] 「金属錯体の機器分析(下)」錯体化学会選書 (2012)
  • Author(s): 大塩寛紀編
  • Publisher: 三共出版