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Magnetic Properties and Nanocrystalline Phases in Sn Containing SmCo5 Alloys

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Abstract

SmCo5 alloys with Sn additions (0.2-2.0 at.%) were prepared by mechanical milling of arc-melted samples. The nano-phase structures and magnetic properties of as-milled powders were investigated. The Sn additions resulted in development of nanocrystalline structures producing exchange-coupled magnets with better remanence magnetization to maximum magnetization ratios (M r/M max), typically 0.92 at 9.9 kOe coercivity. In addition, it was observed that the Sn concentrations lead to higher M r/M max ratios and maximum magnetization accompanying lower coercivity. X-ray diffraction revealed formation of 2:17 and 2:7 phases in 1:5 matrix, which were found to be dependent on Sn percentage. It appeared that higher Sn concentrations promoted 2:17 phase and helped in the formation of nano-sized phases.

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Acknowledgments

The authors are thankful to Prof. Dr. M. F. de Campos of EEIMVR-Universidade Fluminense, Avdos Trabalhadores, Brazil and Prof. Dr. R. William McCallum of Iowa State University Ames, USA for their helpful comments.

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Authors and Affiliations

  1. Faculty of Materials Science and Engineering, GIK Institute of Engineering Sciences and Technology, Topi, KP, Pakistan

    Hamid Zaigham & F. Ahmad Khalid

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  1. Hamid Zaigham
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  2. F. Ahmad Khalid
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Correspondence to F. Ahmad Khalid.

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Zaigham, H., Khalid, F.A. Magnetic Properties and Nanocrystalline Phases in Sn Containing SmCo5 Alloys. J. of Materi Eng and Perform 20, 1304–1309 (2011). https://doi.org/10.1007/s11665-010-9752-8

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  • DOI: https://doi.org/10.1007/s11665-010-9752-8

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