| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2009: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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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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