Abstract

The effects of magnetic field on dielectric constant and electric polarization have been investigated in antiferromagnetic pyroxene CoGeO3. At zero magnetic field, neither dielectric anomaly or electric polarization is observed in this compound. However, under the application of magnetic field, dielectric peak and pyroelectric current peak are present simultaneously around its Néel temperature, and the magnitude of electric polarization monotonously increases with increasing magnetic field, demonstrating an obvious linear magnetoelectric effect in this compound. The origin of these physical effects in CoGeO3 is discussed.

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