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Magnetoelectric effect in perovskite quantum paraelectric EuTiO3

机译：钙钛矿量子顺电EuTiO3中的磁电效应

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摘要

On the basis of successful theoretical explanation of the observed large magnetic-field effect (by similar to7% with 1.5 T) on the dielectric constant below the Neel temperature T-N of 5.5 K, we have demonstrated convincingly the magnetoelectric effect in an antiferromagnetic quantum paraelectric EuTiO3 system. The mutual control of electric and magnetic properties is revealed by the variation of the electric-field-induced polarization with applied magnetic fields as well as the change of the magnetic-field-induced spin moments under the control of electric fields. It is found that the applied electric field (magnetic field) acts like a fictitious magnetic field (electric field) on the EuTiO3 system. The magnetoelectric susceptibility is deduced to be proportional to the product of the magnetization, electrical polarization, magnetic susceptibility and dielectric susceptibility. (C) 2004 Elsevier Ltd. All rights reserved.
机译：在成功的理论解释的基础上，对低于5.5 K的尼尔温度TN的介电常数观察到较大的磁场效应（在1.5 T下与7％相似），我们令人信服地证明了反铁磁量子顺电EuTiO3中的磁电效应系统。电场和极化的相互控制通过施加磁场引起的电场极化的变化以及在电场控制下磁场引起的自旋矩的变化来揭示。发现施加的电场（磁场）在EuTiO3系统上的作用类似于虚拟磁场（电场）。推论出磁电磁化率与磁化强度，电极化，磁化率和电介质磁化率的乘积成正比。 （C）2004 Elsevier Ltd.保留所有权利。

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