Magnetic ordering and tunable structural phase transition in the chromic compound CuMoO4

Takayuki Asano, Taizo Nishimura, Shuta Ichimura, Yuji Inagaki, Tatsuya Kawae, Tomoya Fukui, Yasuo Narumi, Koichi Kindo, Toshimitsu Ito, Sara Haravifard, Bruce D. Gaulin

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Abstract

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=kB = 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 α-CuMoO4 (green) and γ-CuMoO4 (brownish-red). This discontinuous phase transition is tunable using substitutional effects in Cu1-xZnxMoO4 (0 ≥ × ≤ 0.1) and CuMo1-yWyO4 (0 ≤y ≤0.1) over a wide range of temperatures.

Original languageEnglish
Article number093708
Journaljournal of the physical society of japan
Volume80
Issue number9
DOIs
Publication statusPublished - Sep 1 2011

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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