Magnetodielectric effect in EuZrO3
Magnetodielectric effect in EuZrO3
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DOI：
10.1063/1.3456730
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发表时间：
2010-06
影响因子：
4
通讯作者：
T. Kolodiazhnyi;K. Fujita;Lianzhou Wang;Yanhua Zong;Katsuhisa Tanaka;Y. Sakka;E. Takayama-Muromachi
中科院分区：
文献类型：
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作者：
T. Kolodiazhnyi;K. Fujita;Lianzhou Wang;Yanhua Zong;Katsuhisa Tanaka;Y. Sakka;E. Takayama-Muromachi
根据最近的报告反铁磁有序EuZrO 3，我们进行了介电测量，这种材料作为温度和磁场的函数。致密的EuZrO 3陶瓷在300 K时的介电常数为30.1。它在冷却时逐渐减少，没有任何量子顺电行为;然而，低于TN=4.1 K，它显示出明显的下降，定性类似于在EuTiO 3中观察到的。我们报告的介电常数EuZrO 3是磁场依赖。根据最近提出的Eu-O-Eu超交换相互作用与部分共价Ti（Zr）-O键中电子的耦合，讨论了EuTiO 3和EuZrO 3中磁介电效应的大小.
Following recent report on antiferromagnetic ordering in EuZrO3 we performed dielectric measurements of this material as a function of temperature and magnetic field. Dielectric constant of dense EuZrO3 ceramics is 30.1 at 300 K. It gradually decreases upon cooling without any quantum paraelectric behavior; however, below TN=4.1 K it shows a pronounced drop that qualitatively resembles that observed in EuTiO3. We report that dielectric constant of EuZrO3 is magnetic field dependent. The magnitude of the magnetodielectric effect in both EuTiO3 and EuZrO3 is discussed in the light of the recently proposed coupling of the Eu–O–Eu superexchange interactions with electrons involved in partially covalent Ti(Zr)–O bond.