2011 Fiscal Year Final Research Report
Tunable Magnetic Chromism on Copper Molybdate
| Project/Area Number |
21560723
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Kyushu University |
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Principal Investigator |
ASANO Takayuki 九州大学, 大学院・理学研究院, 助教 (00301333)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 新機能材料 |
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| Research Abstract |
We report the first observation of long-ange magnetic order in the chromic compound CuMo0_4 at 1. 75K by means of a specific heat measurement in zero magnetic field. Magnetization measurements performed up to 57T at 4. 2K indicate a plateau at 1/3 of the saturated magnetization consistent with a simple magnetic model of two non-nteracting Cu^<2+> spins and two isolated antiferromagnetic dimers(J/k_B=26K). A large temperature-ysteresis in the magnetic susceptibility is observed to originate from the structural phase transition and to be closely related to chromism between α-CuMo0_4(green) and γ-CuMo0-4(brownish-red). This discontinuous phase transition is tunable using substitutional effects in Cul_XZn, Mo04(0≦x≦0.1} and CuMo_<1-y>W_y,0_4(0<y<0.1) over a wide range of temperatures.
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[Journal Article] Coexistence of singlet and ordered S=1/2 moments in the ground state of the triclinic quantum magnet CuMo0-42011
Author(s)
S. Haravifard, K. Fritsh, T. Asano, J. P. Clancy, Z. Yamani, G. Ehlers, T. Nishimura, Y. Inagaki, T. Kawae, I. Swainson, B. D. Gaul in
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Journal Title
Phys. Rev
Volume: B 84
Pages: 094436-1-7
Peer Reviewed
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[Journal Article] Magnetic Ordering and Tunable Structural Phase Transition in the Chromic Compound CuMo0-42011
Author(s)
T. Asano, T. Nishimura, S. Ichimura, Y. Inagaki, T. Kawae, T. Fukui, Y. Narumi, K. Kindo, T. Ito, S. Haravifard, B. D. Gaulin
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Journal Title
J. Phys. Soc. Jpn
Volume: 80
Pages: 093708-1-4
Peer Reviewed
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