Effect of ionic radii on the Curie temperature in Ba1-x-ySrxCayTiO3 compounds.
Effect of ionic radii on the Curie temperature in Ba1-x-ySrxCayTiO3 compounds.
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DOI：
10.1038/srep28055
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发表时间：
2016-06-21
影响因子：
4.6
通讯作者：
Alford N
中科院分区：
文献类型：
--
作者：
Berenov A;Le Goupil F;Alford N
合成了一系列具有不同A位平均离子半径和阳离子无序度的Ba1-x-ySrxCayTiO3化合物。所有样品都表现出典型的铁电行为。一个简单的经验公式将居里温度TC与A位阳离子的离子半径值关联起来。这种关联与在中子衍射研究中观察到的TiO6八面体的扭曲有关。该方程用于具有预定Tc值的化合物的选择。讨论了A位离子半径对Ba1-x-ySrxCaTiO3相变温度的影响。
A series of Ba1-x-ySrxCayTiO3 compounds were prepared with varying average ionic radii and cation disorder on A-site. All samples showed typical ferroelectric behavior. A simple empirical equation correlated Curie temperature, TC, with the values of ionic radii of A-site cations. This correlation was related to the distortion of TiO6 octahedra observed during neutron diffraction studies. The equation was used for the selection of compounds with predetermined values of TC. The effects of A-site ionic radii on the temperatures of phase transitions in Ba1-x-ySrxCayTiO3 were discussed.