反铁磁有序对YMnO₃外延薄膜铁电极化翻转的影响。
Influence of antiferromagnetic ordering on ferroelectric polarization switching of YMnO3 epitaxial thin films.
作者信息
Maeda Kazuhiro, Yoshimura Takeshi, Fujimura Norifumi
机构信息
Department of Physics and Electronics,Graduate School of Engineering Osaka Prefecture University, Sakai, Osaka 599-8531, Japan.
出版信息
IEEE Trans Ultrason Ferroelectr Freq Control. 2007 Dec;54(12):2641-4. doi: 10.1109/TUFFC.2007.592.
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.
在本研究中，对（0001）YMnO₃外延薄膜在奈尔温度附近的铁电极化开关行为进行了研究。根据从极化-电场（P-E）滞后回线获得的矫顽电场（Eₑ）的频率和温度依赖性的实验结果，详细讨论了磁学与铁电学之间的互相关现象。在1Hz至10kHz的频率范围内测量了薄膜的P-E滞后回线，温度在10至150K之间变化。在所测量的温度范围内，Eₑ的频率依赖性符合石桥-折原理论。然而，在低于120K时，Eₑ的温度依赖性与德文希尔理论不一致，120K接近YMnO₃外延薄膜的奈尔温度。在低于120K时与德文希尔理论不一致，120K接近YMnO₃外延薄膜的奈尔温度。
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