Structure, magnetic properties, and thermal stability of Sm1?em class="a-plus-plus">x Tm x Co5 compounds

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• 作者：Jian-Hua Zuo (1)
  Ming Yue (1)
  Qing-Mei Lu (1)
  Dong-Tao Zhang (1)
  Xue-Xu Gao (2)
  Jiu-Xing Zhang (1)
  Zhao-Hui Guo (3)
  Wei Li (3)
  
• 关键词：Sm1?x Tm x Co5 compounds ; Crystal structure ; Intrinsic magnetic property ; Thermal stability
• 刊名：Rare Metals
• 出版年：2014
• 出版时间：April 2014
• 年：2014
• 卷：33
• 期：2
• 页码：176-179
• 全文大小：
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• 作者单位：Jian-Hua Zuo (1)
  Ming Yue (1)
  Qing-Mei Lu (1)
  Dong-Tao Zhang (1)
  Xue-Xu Gao (2)
  Jiu-Xing Zhang (1)
  Zhao-Hui Guo (3)
  Wei Li (3)
  
  1. College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
  2. State Key Laboratory of Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China
  3. Division of Functional Materials, Central Iron and Steel Research Institute, Beijing, 100081, China
  
• ISSN：1867-7185

文摘

Structure, magnetic properties, and thermal stability of ternary Sm1?em class="a-plus-plus">x Tm x Co5 compounds were studied via X-ray diffraction (XRD), thermal magnetic analysis (TMA), and magnetic measurements. XRD results show that all the compounds have a main phase of hexagonal CaCu5-type crystal structure with small amount of impurity phases; increasing Tm content is associated with contraction of the hexagonal unit cell in the direction of the c axis and expansion of the a and b parameters. TMA results indicate that the Curie temperature (T C) of Sm1?em class="a-plus-plus">x Tm x Co5 compounds gets higher with the increase in Tm content. Magnetic measurements show that both the magnetic anisotropy field (H A) and the magnetization at an applied field of 7?T (M 7?T) decrease with the increase of Tm content. However, the thermal stability of both the H A and M 7?T of all the Tm doped compounds is remarkably improved compared with that of the pure SmCo5 compound, leading to the result that both the M 7?T and H A of Sm0.8Tm0.2Co5.2 are higher than those of SmCo5 compound at 473?K, which indicates the good potential of Tm doped compound in the practical applications at elevated temperature.