Phase transitions in strontium perovskites. Studies of SrOsO3 compared to other 4d and 5d perovksites
Phase transitions in strontium perovskites. Studies of SrOsO3 compared to other 4d and 5d perovksites
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DOI：
10.1016/j.jssc.2016.01.013
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发表时间：
2016-05
影响因子：
3.3
通讯作者：
B. Kennedy;M. Avdeev;H. Feng;K. Yamaura
中科院分区：
文献类型：
--
作者：
B. Kennedy;M. Avdeev;H. Feng;K. Yamaura
用粉末中子衍射和粉末同步辐射X射线衍射研究了SrOsO 3多晶样品的结构。在低温下，SrOsO 3的Pbnm为正交晶系，加热导致Pbnm→ Imma→ I4/mcm→ Pm 3/mcm的一系列相变.将该行为与其它含Sr的钙钛矿的行为进行比较。在Sr BO 3钙钛矿的转变温度的比较表明，公差因子单独不确定的温度下，立方相是稳定的，而是B-位阳离子的电子配置似乎是显着的。
The structure of a polycrystalline sample of SrOsO 3 has been investigated using powder neutron diffraction from 5 to 300 K, and powder synchrotron X-ray diffraction from 80 to 870 K. At low temperatures SrOsO 3 is orthorhombic in Pbnm and heating results in a sequence of phase transition transitions Pbnm→ Imma→ I 4/mcm→ Pm 3 ̅ m. This behavior is compared to that of other Sr containing perovskites. Comparison of the transition temperatures in Sr BO 3 perovskites shows that the tolerance factor alone does not determine the temperature at which the cubic phase is stabilized but rather the electronic configuration of the B-site cation appears to be significant.