Competition between quantum fluctuation and ferroelectric order in Eu_{1鈭?span style='font-style: italic'>x}Ba_xTiO₃

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• 作者：T. Wei^a ; Q.J. Zhou^a ; X. Yang^a ; Q.G. Song^a ; Z.P. Li^a ; X.L. Qi^a ; J.-M. Liu^b ; ^{liujm@nju.edu.cn}
• 关键词：77.22.&minus ; d ; 77.80.Bh ; 77.84.&minus ; s
• 刊名：Applied Surface Science
• 出版年：2012
• 期刊代码：6_01694332
• 类别：ms
• 出版时间：1 March, 2012
• 卷：258
• 期：10
• 页码：4601-4606
• 文件大小：657 K

摘要

A series of polycrystalline Eu_1鈭?em>xBa_xTiO₃ (0.0 鈮?#xA0;x 鈮?#xA0;1.0) samples were synthesized through solid-state reaction method, and their microstructural, ferroelectric, dielectric, and phase transition properties are researched. We investigated the structural properties of Eu_1鈭?em>xBa_xTiO₃ system and revealed the structure transition from cubic perovskite to tetragonal perovskite with increasing x. More importantly, it is found that there exists strong quantum fluctuation (QF) in EuTiO₃ and the ferroelectric state is built only at relatively high level Ba doping. Furthermore, quantum ferroelectric state (QFE) with broad scope is revealed for Eu_1鈭?em>xBa_xTiO₃ system through our ferroelectric and dielectric measurements.