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2006 Fiscal Year Final Research Report Summary

Application of Molecular Spins : from Nanomagnets to Biological Spin Systems

Research Project

Project/Area Number 15087103
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionNagoya University

Principal Investigator

AWAGA Kunio  Nagoya University, Research Center of Materials Science, Professor, 物質科学国際研究センター, 教授 (10202772)

Co-Investigator(Kenkyū-buntansha) FUJITA Wataru  Nagoya University, Department of Chemistry, Research Associate, 大学院理学研究科, 助手 (50292719)
IWASAKA Masakazu  Chiba University, Department of Engineering, Associate Professor, 工学部, 助教授 (90243922)
TERUI Toshifumi  National Institute of Information and Communications, Technology, Researcher, 基礎先端部門, 主任研究員 (50359098)
Project Period (FY) 2003 – 2006
KeywordsMagnetic bistability / Molecular magnetism / Nanomagnet / Photo-induced phase transition
Research Abstract

We have examined the crystal structures and magnetic properties of heterocyclic thiazyl radicals which possessed chemical stabilities, 3D network structures in the solid states, and strong exchange interactions. We found various functional properties, such as a photo-induced phase transition at room temperature in TTTA, high-Tc ferromagnetic ordering in a BBDTA salt, charge-transfer phase transition in a BDYTA salt, and a non-linear electrical transport in a NT salt. Besides, we revealed magneto-structural correlation in Mn12 with a characteristic Jahn-Teller distortion, and developed chemical syntheses of spherical hollow magnets of various metals and metal oxides with a diameter of 500 nm.

  • Research Products

    (11 results)

All 2007 2006 2004

All Journal Article (10 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Coordination bond formation at charge-transfer phase transition in (BDTA)_2[Co(mnt)_2]2006

    • Author(s)
      Fujita, K. Awaga
    • Journal Title

      J. Am. Chem. Soc. 128

      Pages: 1084-1085

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Multi-dimensional crystal structures and unique solid-state properties of heterocyclic thiazyl radicals and related materials2006

    • Author(s)
      K.Awaga, T.Tanaka, T.Shirai, M.Fujimori, Y.Suzuki, H.Yoshikawa, W.Fujita
    • Journal Title

      Bull. Chem. Soc. Japan 79

      Pages: 25-34

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Low-field negative resistance effect in a charge-ordered state of thiazyl radical crystals2006

    • Author(s)
      K.Okamoto, T.Tanaka, W.Fujita, K.Awaga, T.Inabe
    • Journal Title

      Angew. Chem. Int. Ed 45

      Pages: 4515-4518

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Coordination bond formation at charge-transfer phase transition in (BDTA)2[Co(mnt)2]2006

    • Author(s)
      Fujita, K. Awaga
    • Journal Title

      J. Am. Chem. Soc. 128

      Pages: 1084-1085

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Low-field negative resistance effect in a charge-ordered state of thiazyl radical crystals2006

    • Author(s)
      K.Okamoto, T.Tanaka, W.Fujita, K.Awaga, T.Inabe
    • Journal Title

      Angew. Chem. Int. Ed. 45

      Pages: 4515-4518

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Crystal structure and magnetic properties of a thiazyl organic ferromagnet, BBDTA-GaCl_4 with T_c=7.0 K2004

    • Author(s)
      W.Fujita, K.Awaga
    • Journal Title

      Chem. Phys. Lett. 388

      Pages: 186-189

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Structure and magnetic properties of single-molecule magnet [Mn_<11>CrO_<12>(O_2CCH_3)_<16>(H_2O)_4]-2CH_3COOH-4H_2O : Magnetization manipulation and dipolar-biased tunneling in Mn11Cr/Mn12 mixed crystal2004

    • Author(s)
      H.Hachisuka, K.Awaga, T.Yokoyama, T.Kubo, T.Goto, H.Nojiri
    • Journal Title

      Phys. Rev. B 70

      Pages: 104427

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Preparation and Magnetic Properties of Hollow Nano-Spheres of Cobalt and Cobalt Oxide : Drastic Cooling-Field Effects on Remnant Magnetization of Antiferromagnet2004

    • Author(s)
      H.Yoshikawa, K.Hayashida, Y.Kozuka, A.Horiguchi, K.Awaga, S.Bandow, S.Iijima
    • Journal Title

      Appl. Phys. Lett. 85

      Pages: 5287-5289

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Crystal structure and magnetic properties of a thiazyl organic ferromagnet, BBDTA・GaC14 with Tc=7.0 K2004

    • Author(s)
      W.Fujita, K.Awaga
    • Journal Title

      Chem. Phys. Lett. 388

      Pages: 186-189

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Structure and magnetic properties of single-molecule magnet [MniiCrO12(O2CCH3)16(H2O)4]・CH3COOH・4H2O :,Magnetization manipulation and dipolar-biased tunneling in Mn11Cr/Mn12 mixed crystal2004

    • Author(s)
      H.Hachisuka, K.Awaga, T.Yokoyama, T.Kubo, T.Goto, H.Nojiri
    • Journal Title

      Phys. Rev. B 70

      Pages: 104427

    • Description
      「研究成果報告書概要(欧文)」より
  • [Patent(Industrial Property Rights)] 分子クラスター二次電池2007

    • Inventor(s)
      阿波賀邦夫, 吉川浩史, 和田潤
    • Industrial Property Rights Holder
      名古屋大学, 日本化成
    • Industrial Property Number
      2007-037128
    • Filing Date
      2007-02-19
    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2008-05-27  

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