Influence of antiferromagnetic ordering on ferroelectric polarization switching of YMnO3 epitaxial thin films.
In this study, the switching behavior of ferroelectric polarization of (0001) YMnO(3) epitaxial films at around Néel temperature was investigated. From the experimental results of the frequency and temperature dependences of coercive electric filed (E(c)) obtained from polarization-electric field (P-E) hysteresis loop, the crosscorrelation phenomena between magnetics and ferroelectrics are discussed in detail. The P-E hysteresis loops of the films were measured in the frequency range from 1 Hz to 10 kHz, and the temperature was varied from 10 to 150 K. Frequency dependence of Ec accorded with Ishibashi-Orihara's theory at the measured temperature range. However, temperature dependence of E(c) disagreed with Devonshire's theory below 120 K, which is close to the Néeel temperature of the YMnO(3) epitaxial film. disagreed with Devonshire's theory below 120 K, which is close to the Neel temperature of the YMnO(3) epitaxial film.
Maeda
Kazuhiro
K
Department of Physics and Electronics,Graduate School of Engineering Osaka Prefecture University, Sakai, Osaka 599-8531, Japan. m-kazoo@pe.osakafu-u.ac.jp
Yoshimura
Takeshi
T
Fujimura
Norifumi
N