...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Temperature evolution of the magnetic structure of TbMn_2O_5
【24h】

Temperature evolution of the magnetic structure of TbMn_2O_5

机译：TbMn_2O_5磁性结构的温度演化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We have investigated the ordered magnetic structures of TbMn_2O_5 and their temperature evolution using single-crystal neutron Laue diffraction. From a least-squares fit to diffraction intensities extracted from the Laue patterns recorded at varying angles at T = 2 K, we were able to refine a magnetic structure model to obtain the magnetic-twin populations, three components of moment for each of the four independent Mn and two independent Tb sublattices, together with phase factors for all of these sublattices. The temperature evolution of the magnetic structures was followed from fixed crystal-orientation Laue patterns collected at close temperature intervals between 2 and 38 K. Least-squares refinement of data extracted from these patterns showed that although the magnetic propagation vector r changes abruptly in the temperature ranges 20-22 and 35-37 K, the magnetic structural motif remains essentially the same in all of the ordered phases, although some of the parameters, in particular the orientation angles, change significantly at the lower temperature transition. The observation of significant 3t reflections in the Laue diagrams between 2 and 20 K shows that the magnetic modulation is nonsinusoidal in this temperature range.
机译：我们使用单晶中子Laue衍射研究了TbMn_2O_5的有序磁性结构及其温度演化。从最小二乘拟合到从在T = 2 K下以不同角度记录的劳厄图谱中提取的衍射强度，我们能够完善磁结构模型以获得磁双晶种群，这四个分子中的每一个都有三个矩分量独立的Mn和两个独立的Tb子晶格，以及所有这些子晶格的相位因子。磁性结构的温度演变是通过在2至38 K的近温度间隔内收集的固定晶体取向Laue图进行的。从这些图提取的数据的最小二乘提纯表明，尽管磁传播矢量r在温度上突然变化在20-22和35-37 K范围内，尽管某些参数（尤其是取向角）在较低的温度转变时会发生显着变化，但磁性结构基序在所有有序相中都基本相同。在Laue图中2至20 K之间观察到明显的3t反射，表明在此温度范围内磁调制是非正弦的。

著录项

  • 来源
    《Physical review》 |2011年第22期|p.224422.1-224422.7|共7页
  • 作者

    C. Wilkinson; P. J. Brown; T. Chatterji;

  • 作者单位

    Institut Laue-Langevin, B.P. 156, F-38042 Grenoble Cedex 9, France;

    Institut Laue-Langevin, B.P. 156, F-38042 Grenoble Cedex 9, France;

    Institut Laue-Langevin, B.P. 156, F-38042 Grenoble Cedex 9, France;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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