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Magnetization Reversal Behavior of α-Fe/Nd 2 Fe 1 4 B Nanocomposites Prepared by Controlled Melt Spinning

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Abstract

A comparative study has been performed concerning the magnetization reversal behavior of α-Fe/Nd2Fe14B nanocomposite magnets prepared by direct melt spinning and annealing. α-Fe/Nd2Fe14B nanocomposite magnets with strong crystal texture and small and uniform grain size were prepared by controlled melt spinning of Nd9Fe85B6 alloy. The higher coercivity of magnets prepared by direct melt spinning originates from the increased critical field for irreversible magnetization reversal of the hard phase, which results from the increased pinning field and the deterioration of exchange coupling among hard grains. The magnetization reversal of hard grains becomes more uniform, which results in the improvement of squareness in hysteresis loop. It is expected that higher values for the squareness in hysteresis loop and coercivity will be obtained by improving the microstructure.

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Acknowledgments

The authors are indebted to the NSFC (Nos. 51171164, 51031004, 50901064, and 51471145) and the NSF of Hebei Province (No. E2015203185).

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Authors and Affiliations

  1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, 066004, Qinhuangdao, People’s Republic of China

    Yongmei Zhang, Wei Li, Chunhong Xie & Xiangyi Zhang

  2. College of Science, North University of China, 030051, Shanxi, People’s Republic of China

    Yongmei Zhang

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  1. Yongmei Zhang
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  2. Wei Li
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  3. Chunhong Xie
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  4. Xiangyi Zhang
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Correspondence to Yongmei Zhang or Xiangyi Zhang.

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Zhang, Y., Li, W., Xie, C. et al. Magnetization Reversal Behavior of α-Fe/Nd 2 Fe 1 4 B Nanocomposites Prepared by Controlled Melt Spinning. J Supercond Nov Magn 29, 2345–2350 (2016). https://doi.org/10.1007/s10948-016-3540-0

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  • DOI: https://doi.org/10.1007/s10948-016-3540-0

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