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

الأصل · EN

We study the multiferroic properties in the distorted tetrahedral quasi-one dimensional spin system Cu₃Mo₂O₉, 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 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.