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Highly thermal-stable ferromagnetism by a natural composite

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  • Tianyu Ma

    (School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Key Laboratory of Novel Materials for Information Technology of Zhejiang Province, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University
    Ferroic Physics Group, National Institute for Materials Science)

  • Junming Gou

    (School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Key Laboratory of Novel Materials for Information Technology of Zhejiang Province, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University)

  • Shanshan Hu

    (School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Key Laboratory of Novel Materials for Information Technology of Zhejiang Province, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University)

  • Xiaolian Liu

    (School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Key Laboratory of Novel Materials for Information Technology of Zhejiang Province, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University
    Ferroic Physics Group, National Institute for Materials Science)

  • Chen Wu

    (School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Key Laboratory of Novel Materials for Information Technology of Zhejiang Province, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University)

  • Shuai Ren

    (Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology, Xi’an Jiaotong University)

  • Hui Zhao

    (Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology, Xi’an Jiaotong University)

  • Andong Xiao

    (Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology, Xi’an Jiaotong University)

  • Chengbao Jiang

    (School of Materials Science and Engineering, Beihang University)

  • Xiaobing Ren

    (Ferroic Physics Group, National Institute for Materials Science
    Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology, Xi’an Jiaotong University)

  • Mi Yan

    (School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Key Laboratory of Novel Materials for Information Technology of Zhejiang Province, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University)

Abstract

All ferromagnetic materials show deterioration of magnetism-related properties such as magnetization and magnetostriction with increasing temperature, as the result of gradual loss of magnetic order with approaching Curie temperature TC. However, technologically, it is highly desired to find a magnetic material that can resist such magnetism deterioration and maintain stable magnetism up to its TC, but this seems against the conventional wisdom about ferromagnetism. Here we show that a Fe–Ga alloy exhibits highly thermal-stable magnetization up to the vicinity of its TC, 880 K. Also, the magnetostriction shows nearly no deterioration over a very wide temperature range. Such unusual behaviour stems from dual-magnetic-phase nature of this alloy, in which a gradual structural-magnetic transformation occurs between two magnetic phases so that the magnetism deterioration is compensated by the growth of the ferromagnetic phase with larger magnetization. Our finding may help to develop highly thermal-stable ferromagnetic and magnetostrictive materials.

Suggested Citation

  • Tianyu Ma & Junming Gou & Shanshan Hu & Xiaolian Liu & Chen Wu & Shuai Ren & Hui Zhao & Andong Xiao & Chengbao Jiang & Xiaobing Ren & Mi Yan, 2017. "Highly thermal-stable ferromagnetism by a natural composite," Nature Communications, Nature, vol. 8(1), pages 1-9, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms13937
    DOI: 10.1038/ncomms13937
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