首页> 外文期刊>International Journal of Quantum Chemistry >The nature of the orthorhombic to tetragonal phase transition in Sr1-xCaxMnO3
【24h】

The nature of the orthorhombic to tetragonal phase transition in Sr1-xCaxMnO3

机译:Sr1-xCaxMnO3中正交晶向四方相变的性质

获取原文
获取原文并翻译 | 示例
       

摘要

The orthorhombic-tetragonal phase transition in the perovskite series Sr(1-x)Ca(x)MnO3 0.4 <= x <= 0.6 has been studied by synchrotron X-ray powder diffraction. At room temperature the Ca rich oxides x >= 0.45 have the orthorhombic Pbnm superstructure whereas Sr0.6Ca0.4MnO3 is two phases with both tetragonal I4/mcm and orthorhombic Pbnm. Analysis of the octahedral tilts suggest the coexistence of these two phases is a consequence of a first-order I4/mcm to Pbnm transition. The evolution of the structure of Sr0.5Ca0.5MnO3 with temperature is also described and this is found to evolve from orthorhombic to tetragonal and ultimately cubic. (c) 2006 Elsevier Inc. All rights reserved.
机译:通过同步加速器X射线粉末衍射研究了钙钛矿系列Sr(1-x)Ca(x)MnO3 0.4 <= x <= 0.6中的斜方四方相变。在室温下,富含Ca的氧化物x> = 0.45具有斜方晶的Pbnm超结构,而Sr0.6Ca0.4MnO3为两相,具有正交I4 / mcm和正交晶的Pbnm。对八面体倾斜的分析表明,这两个相并存是一阶I4 / mcm至Pbnm跃迁的结果。还描述了Sr0.5Ca0.5MnO3的结构随温度的演变,并且发现它是从正交晶体演化为四方晶体,最终是立方晶体。 (c)2006 Elsevier Inc.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号