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arXiv · 1702.04828

Magnetism of the antiferromagnetic spin-$\frac{3}{2}$ dimer compound CrVMoO$_7$ having an antiferromagnetically ordered state

Masashi Hase·Yuta Ebukuro·Haruhiko Kuroe·Masashige Matsumoto·Akira Matsuo·Koichi Kindo·James R. Hester·Taku J. Sato·Hiroki Yamazaki
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Abstract

We measured magnetization, specific heat, electron spin resonance, neutron diffraction, and inelastic neutron scattering of CrVMoO$_7$ powder. An antiferromagnetically ordered state appears below $T_{\rm N} = 26.5 \pm 0.8$ K. We consider that the probable spin model for CrVMoO$_7$ is an interacting antiferromagnetic spin-$\frac{3}{2}$ dimer model. We evaluated the intradimer interaction $J$ to be $25 \pm 1$ K and the effective interdimer interaction $J_{\rm eff}$ to be $8.8 \pm 1$ K. CrVMoO$_7$ is a rare spin dimer compound that shows an antiferromagnetically ordered state at atmospheric pressure and zero magnetic field. The magnitude of ordered moments is $0.73(2) μ_{\rm B}$. It is much smaller than a classical value $\sim 3 μ_{\rm B}$. Longitudinal-mode magnetic excitations may be observable in single crystalline CrVMoO$_7$.

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Masashi Hase, Yuta Ebukuro, Haruhiko Kuroe, Masashige Matsumoto, Akira Matsuo, Koichi Kindo, James R. Hester, Taku J. Sato, Hiroki Yamazaki. 2017-02-16. Magnetism of the antiferromagnetic spin-$\frac{3}{2}$ dimer compound CrVMoO$_7$ having an antiferromagnetically ordered state. https://doi.org/10.1103/physrevb.95.144429

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