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Structure, magnetic properties, and thermal stability of Sm1−x Tm x Co5 compounds

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Abstract

Structure, magnetic properties, and thermal stability of ternary Sm1−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−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.

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Acknowledgments

This work was financially supported by the State Key Development Program of Basic Research of China (No. 2010CB934600), State Key Laboratory of Advanced Metals and Materials (No. 2011-ZD02), and the Project of Construction of Innovative Teams and Teacher Career Development for Universities and Colleges under Beijing Municipality (No. 009000543113507) .

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Authors and Affiliations

  1. College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China

    Jian-Hua Zuo, Ming Yue, Qing-Mei Lu, Dong-Tao Zhang & Jiu-Xing Zhang

  2. State Key Laboratory of Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China

    Xue-Xu Gao

  3. Division of Functional Materials, Central Iron and Steel Research Institute, Beijing, 100081, China

    Zhao-Hui Guo & Wei Li

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  1. Jian-Hua Zuo
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  2. Ming Yue
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Correspondence to Ming Yue.

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Zuo, JH., Yue, M., Lu, QM. et al. Structure, magnetic properties, and thermal stability of Sm1−x Tm x Co5 compounds. Rare Met. 33, 176–179 (2014). https://doi.org/10.1007/s12598-014-0232-4

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  • DOI: https://doi.org/10.1007/s12598-014-0232-4

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