中国物理B ›› 2013, Vol. 22 ›› Issue (9): 97501-097501.doi: 10.1088/1674-1056/22/9/097501

所属专题: TOPICAL REVIEW — Magnetism, magnetic materials, and interdisciplinary research

• SPECIAL TOPIC --- Non-equilibrium phenomena in soft matters • 上一篇    下一篇

Crystal structures, phase relationships, and magnetic phase transitions of R5M4 compounds (R=rare earths, M=Si, Ge)

欧阳钟文a, 饶光辉b   

  1. a Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China;
    b School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
  • 收稿日期:2013-06-17 出版日期:2013-07-26 发布日期:2013-07-26
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grants Nos. 50025102 and 50631040), the National Basic Research Program of China (Grant No. 2006CB601101), the Exchange Program between NIST and the Chinese Academy of Sciences, and the Natural Science Foundation of Guangxi Province, China (Grant No. 2012GXNSFGA060002).

Crystal structures, phase relationships, and magnetic phase transitions of R5M4 compounds (R=rare earths, M=Si, Ge)

Ouyang Zhong-Wen (欧阳钟文)a, Rao Guang-Hui (饶光辉)b   

  1. a Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China;
    b School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
  • Received:2013-06-17 Online:2013-07-26 Published:2013-07-26
  • Contact: Rao Guang-Hui E-mail:rgh@guet.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grants Nos. 50025102 and 50631040), the National Basic Research Program of China (Grant No. 2006CB601101), the Exchange Program between NIST and the Chinese Academy of Sciences, and the Natural Science Foundation of Guangxi Province, China (Grant No. 2012GXNSFGA060002).

摘要: Our recent studies of the crystal structures, phase transitions, and magnetic properties of intermetallic compounds R5M4 (R=rare earths; M=Si, Ge) are reviewed briefly. First, crystal structures, phase relationships, and magnetic properties of several 5:4 compounds, including Nd5Si4-xGex, Pr5Si4-xGex, Gd5-xLaxGe4, La5Si4, and Gd5Sn4, are presented. In particular, the canted spin structures as well as the magnetic phase transitions in Pr5Si2Ge2 and Pr5Ge4 investigated by neutron powder diffractions and small-angle neutron scattering are reviewed. Second, the crystal structures and magnetic properties of the most studied compounds Gd5(Si,Ge)4 are summarized. The focus is on the parent compound Gd5Ge4, which is an amazing material exhibiting magnetic anisotropy, angular dependent spin-flop transition, metastable magnetic response, Griffiths-like phase, thermal effect under pulsed fields, antiferromagnetic and ferromagnetic resonances, pronounced effects of impurities, and high-field induced magnetic transitions.

关键词: crystal structure, phase relationship, magnetic phase transition

Abstract: Our recent studies of the crystal structures, phase transitions, and magnetic properties of intermetallic compounds R5M4 (R=rare earths; M=Si, Ge) are reviewed briefly. First, crystal structures, phase relationships, and magnetic properties of several 5:4 compounds, including Nd5Si4-xGex, Pr5Si4-xGex, Gd5-xLaxGe4, La5Si4, and Gd5Sn4, are presented. In particular, the canted spin structures as well as the magnetic phase transitions in Pr5Si2Ge2 and Pr5Ge4 investigated by neutron powder diffractions and small-angle neutron scattering are reviewed. Second, the crystal structures and magnetic properties of the most studied compounds Gd5(Si,Ge)4 are summarized. The focus is on the parent compound Gd5Ge4, which is an amazing material exhibiting magnetic anisotropy, angular dependent spin-flop transition, metastable magnetic response, Griffiths-like phase, thermal effect under pulsed fields, antiferromagnetic and ferromagnetic resonances, pronounced effects of impurities, and high-field induced magnetic transitions.

Key words: crystal structure, phase relationship, magnetic phase transition

中图分类号:  (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))

  • 75.30.Kz
75.30.Sg (Magnetocaloric effect, magnetic cooling) 61.66.Dk (Alloys )