Magnetic Ordering and Tunable Structural Phase Transition in the Chromic Compound CuMoO4
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概要
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We report the first observation of long-range magnetic order in the chromic compound CuMoO4 at 1.75 K by means of a specific heat measurement in zero magnetic field. Magnetization measurements performed up to 57 T at 4.2 K indicate a plateau at 1/3 of the saturated magnetization consistent with a simple magnetic model of two non-interacting Cu2+ spins and two isolated antiferromagnetic dimers (J/k_{\text{B}} = 26 K). A large temperature-hysteresis in the magnetic susceptibility is observed to originate from the structural phase transition and to be closely related to chromism between \alpha-CuMoO4 (green) and \gamma-CuMoO4 (brownish-red). This discontinuous phase transition is tunable using substitutional effects in Cu1-xZnxMoO4 (0\leq x\leq 0.1) and CuMo1-yWyO4 (0\leq y\leq 0.1) over a wide range of temperatures.
- 2011-09-15
著者
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FUKUI Tomoya
Institute for Solid State Physics, The University of Tokyo
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INAGAKI Yuji
Department of Applied Quantum Physics and Nuclear Engineering Faculty of Engineering, Kyushu Univers
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Kindo Koichi
Institute For Solid State Physics The University Of Tokyo
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Ito Toshimitsu
National Institute For Advanced Industrial Science And Technology
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Kawae Tatsuya
Department Of Applied Quantum Physics Kyushu University
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Asano Takayuki
Department Of Agricultural And Environmental Biology Graduate School Of Agricultural And Life Scienc
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Narumi Yasuo
Institute For Materials Research Tohoku University
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Narumi Yasuo
Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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Gaulin Bruce
Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada
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Asano Takayuki
Department of Physics, Kyushu University, Fukuoka 812-8581, Japan
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Nishimura Taizo
Department of Physics, Kyushu University, Fukuoka 812-8581, Japan
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Ichimura Shuta
Department of Physics, Kyushu University, Fukuoka 812-8581, Japan
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Haravifard Sara
Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada
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Ito Toshimitsu
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8562, Japan
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Kawae Tatsuya
Department of Applied Quantum Physics, Kyushu University, Fukuoka 819-0395, Japan
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