2004 Fiscal Year Final Research Report Summary
Development and Application cf Bistability in Molecule-based Magnetic Mterials
| Project/Area Number |
13304054
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
機能・物性・材料
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| Research Institution | Nagoya University |
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Principal Investigator |
AWAGA Kunio Nagoya University, Dept.of Chem., Prof., 大学院・理学研究科, 教授 (10202772)
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| Co-Investigator(Kenkyū-buntansha) |
FUJITA Wataru Nagoya University, Research Center of Materials Science, Research Associate, 物質科学国際研究センター, 助手 (50292719)
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| Project Period (FY) |
2001 – 2004
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| Keywords | Molecular magnetism / Bistability / nanomagnet / Single Molecule Magnet |
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| Research Abstract |
The science and technology of spin electronic devices have attracted much interest. In this project, we developed molecule-based magnetic materials for future spintronics.
1)Thiazyl radicals possess chemical stability and strong intermolecular interactions. We carried out a systematic study, namely, chemical syntheses, structural analyses, and physical measurements on this radical family, and discovered room-temperature magnetic bistability, photo-induced phase transition, organic ferromagnetism, etc.
2)Development of molecular-/nano-magnets is a key issue for spintronics. Some of transition-metal cluster complexes exhibit a hysteresis loop on magnetization curve, so that they are called single molecule magnets(SMM). In this project, we performed chemical modifications on SMM, in order to elucidate the magneto-structural correlation and to control the classical and quantum magnetic relaxations. The magneto-structural correlation in SMM was revealed.
We also developed synthesis of novel nanomagnets. We succeeded in uniform coating of polystyrene beads (O.D.300-1000 nm) with cobalt hydroxides, and obtained spherical hollow nanomagnets of fee Co and spinel Co_3O_4.
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[Journal Article] Magnetic anisotropy, tunneling effects, high-frequency EPR, and molecular structure of fast-relaxation species of Mn_<12>2002
Author(s)
K.Takeda, K.Awaga, T.Inabe, A.Yamaguchi, H.Ishimoto, T.Tomita, H.Mitamura, T.Goto, N.Mori, H.Nojiri
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Journal Title
Phys.Rev. B65
Pages: 094424
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Magnetic anisotropy, tunneling effects, high-frequency EPR, and niolecular structure of fast-relaxation species of Mn_<12>2002
Author(s)
K.Takeda, K.Awaga, T.Inabe, A.Yamaguchi, H.Ishimolo, T.Tomita, H.Mitamura, T.Goto, N.Mori, H.Nojiri
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Journal Title
Phys.Rev.B 65
Pages: 094424
Description
「研究成果報告書概要(欧文)」より
