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Materials science

Magnetic alloys break the rules

A family of alloys has been discovered that undergoes unexpected changes of shape when magnetized. This strange behaviour might help in unravelling the mystery of a phenomenon called magnetic hysteresis. See Letter p.340

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Figure 1: Typical hysteresis loops in hard, soft and autarkic magnets.


  1. 1.

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  1. 1

    Chopra, H. D. & Wuttig, M. Nature 521, 340–343 (2015).

    ADS  CAS  Article  PubMed  Google Scholar 

  2. 2

    Gutfleisch, O. et al. Adv. Mater. 23, 821–842 (2011).

    CAS  Article  Google Scholar 

  3. 3

    Coey, J. M. D. IEEE Trans. Magn. 47, 4671–4681 (2011).

    ADS  CAS  Article  Google Scholar 

  4. 4

    Bertotti, G. & Mayergoyz, I. D. The Science of Hysteresis (Gulf, 2006).

    MATH  Google Scholar 

  5. 5

    Hubert, A. & Schäfer, R. Magnetic Domains: The Analysis of Magnetic Microstructures (Springer, 2008).

    Google Scholar 

  6. 6

    Bozorth, R. M. Ferromagnetism (Van Nostrand, 1951).

    Google Scholar 

  7. 7

    Bozorth, R. M. Rev. Mod. Phys. 25, 42 (1953).

    ADS  CAS  Article  Google Scholar 

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Correspondence to Richard D. James.

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James, R. Magnetic alloys break the rules. Nature 521, 298–299 (2015).

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