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arXiv · 1112.5805

Magnetic and electric properties in the distorted tetrahedral spin chain system Cu3Mo2O9

T. Hosaka·S. Hachiuma·H. Kuroe·T. Sekine·M. Hase·K. Oka·T. Ito·H. Eisaki·M. Fujisawa·S. Okubo·H. Ohta
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Abstract

We study the multiferroic properties in the distorted tetrahedral quasi-one dimensional spin system Cu$_3$Mo$_2$O$_9$, in which the effects of the low dimensionality and the magnetic frustration are expected to appear simultaneously. We clarify that the antiferromagnetic order is formed together with ferroelectric properties at $T_{\rm N}=7.9$ K under zero magnetic field and obtain the magnetic-field-temperature phase diagram by measuring dielectric constant and spontaneous electric polarization. It is found that the antiferromagnetic phase possesses a spontaneous electric polarization parallel to the c axis when the magnetic field $H$ is applied parallel to the a axis. On the other hand, there are three different ferroelectric phases in the antiferromagnetic phase for $H$ parallel to the c axis.

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T. Hosaka, S. Hachiuma, H. Kuroe, T. Sekine, M. Hase, K. Oka, T. Ito, H. Eisaki, M. Fujisawa, S. Okubo, H. Ohta. 2011-12-26. Magnetic and electric properties in the distorted tetrahedral spin chain system Cu3Mo2O9. https://doi.org/10.1088/1742-6596%2F400%2F3%2F032022

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