Abstract
The effects of antiferromagnetic ordering on the ferroelectric polarization switching behavior of an YMnO3 epitaxial thin film were investigated. The effects of magnetic ordering on ferroelectric polarization switching and dielectric permittivity under bias electric field at around the Néel temperature of YMnO3 (80 K) were studied. From temperature dependences of the dielectric permittivity and spontaneous polarization, an increase in the domain size with decreasing temperature was suggested. From high-speed capacitance measurement, it was also determined that domain wall motion increased with decreasing temperature. Moreover, it was determined that the suppression of polarization switching started at around 120–130 K, which is higher than Néel temperature of YMnO3.
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