• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physica, B. Condensed Matter >X-ray diffraction study of the structural phase transition in MnAs under high magnetic fields
【24h】

X-ray diffraction study of the structural phase transition in MnAs under high magnetic fields

机译：强磁场下MnAs中结构相变的X射线衍射研究

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

The structural phase transition induced by magnetic fields on MnAs was observed by the X-ray diffraction measurements in high magnetic fields up to 4 T. Magnetization measurements showed that Curie temperature T-C was 315.5 K for increasing temperatures and a metamagnetic transition from the paramagnetic to the ferromagnetic state occurred above T-C. The structural transformation from the hexagonal NiAs-type to the orthorhombic MnP-type structure was confirmed at T-C with increasing temperature from 290 to 319 K via two-phase coexistence region. The X-ray diffraction profiles at 319 K showed the single phase of the MnP-type structure in zero field and applying magnetic field of 3 T caused appearance of the Brag peak of the hexagonal structure. On further increase of magnetic fields, the single phase of the hexagonal structure was observed above 3.5 T in the forced ferromagnetic state. Both the magnetic and structural transitions induced by magnetic fields above T-C were first order with a hysteresis and had a close relationship between each other. (C) 2004 Elsevier B.V. All rights reserved.
机译：在高达4 T的高磁场中，通过X射线衍射测量观察到了MnAs上的磁场引起的结构相变。磁化测量显示，居里温度TC为315.5 K（随温度升高），并且从顺磁向顺磁转变。铁磁状态发生在TC以上。随着温度从290 K升高到319 K，通过两相共存区域，在T-C处证实了从六方NiAs型向正交MnP型结构的结构转变。 319 K的X射线衍射图表明MnP型结构的单相处于零场，施加3 T磁场导致出现六方结构的Brag峰。随着磁场的进一步增加，在强制铁磁状态下，六角形结构的单相在3.5 T以上被观察到。由高于T-C的磁场引起的磁跃迁和结构跃迁都是一阶的，具有磁滞现象，并且彼此之间具有密切的关系。 （C）2004 Elsevier B.V.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