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首页> 外文期刊>Journal of Crystal Growth >Crystal growth and neutron diffraction studies of Li_xCoO_2 bulk single crystals
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Crystal growth and neutron diffraction studies of Li_xCoO_2 bulk single crystals

机译：Li_xCoO_2块状单晶的晶体生长和中子衍射研究

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摘要

The first successful growth of neutron-size single-crystal Li_xCoO_2 by the optical floating-zone technique is reported. Structural properties have been studied using the time-of-flight neutron Laue diffraction technique. Our experiment is the first report of the Li_xCoO_2 single-crystal neutron study. The neutron diffraction profile yields sharp, strong Bragg reflections, indicating a single grain of high crystalline quality. The structural refinement from the single-crystal neutron diffraction data indicated a trigonal structure of space group R3-barm, and a Li concentration x=0.87. No superlattice reflections were detected. The surface morphology analysed by scanning electron microscopy revealed the absence of cracks. The magnetic susceptibility was measured in a field of 1 T with H‖c and H⊥c, and an antiferromagnetic transition was observed at ～10 K, with no magnetic impurities.
机译：报道了通过光学浮区技术成功中子尺寸的单晶Li_xCoO_2的成功生长。已经使用飞行时间中子劳厄衍射技术研究了结构特性。我们的实验是Li_xCoO_2单晶中子研究的第一份报告。中子衍射轮廓产生清晰的，强烈的布拉格反射，表明具有高结晶质量的单晶粒。从单晶中子衍射数据得到的结构细化表明，空间群R3-barm为三角形结构，Li浓度x = 0.87。没有检测到超晶格反射。通过扫描电子显微镜分析的表面形态显示不存在裂纹。在H'c和H⊥c的1 T磁场中测量磁化率，并在〜10 K处观察到反铁磁跃迁，没有磁性杂质。

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  • 来源
    《Journal of Crystal Growth》 |2014年第1期|169-172|共4页
  • 作者

    S. Uthayakumar; M.S. Pandiyan; D.G. Porter; M.J. Gutmann; R. Fan; J.P. Goff;

  • 作者单位

    Department of Physics, Royal Holloway, University of London, Egham, Surrey TW20 0EX, United Kingdom;

    Department of Physics, Royal Holloway, University of London, Egham, Surrey TW20 0EX, United Kingdom;

    Department of Physics, Royal Holloway, University of London, Egham, Surrey TW20 0EX, United Kingdom;

    ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, United Kingdom;

    Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom;

    Department of Physics, Royal Holloway, University of London, Egham, Surrey TW20 0EX, United Kingdom;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A1. Crystal structure; A2. Floating zone technique; A2. Single crystal growth; B1. Lithium compounds;

    机译：A1。晶体结构A2。浮动区技术;A2。单晶生长;B1。锂化合物;

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