Effect of ball milling and post-annealing on magnetic properties of Ni49.8Mn28.5Ga21.7 alloy powders

B. Tian, F. Chen, Yinong Liu, Y.F. Zheng

    Research output: Contribution to journalArticle

    40 Citations (Scopus)

    Abstract

    The transformation and magnetic properties of Ni49.8Mn28.5Ga21.7 powders produced by ball milling and post-milling annealing were investigated in this study. It was found that ball milling suppresses both the Curie transition and the Heusler ↔ tetragonal martensitic phase transformation of the alloy. Ball milling also severely weakens the magnetization of the alloy. Annealing at elevated temperatures is effective in restoring the ferromagnetism and the martensitic transformation of the alloy. The suppression of the Curie transition is attributed to atomic disordering caused by ball milling. The suppression of the martensitic transformation is attributed to severe structural deformation as well as atomic disordering induced by the ball milling.
    Original languageEnglish
    Pages (from-to)1279-1284
    JournalIntermetallics
    Volume16
    Issue number11/12
    DOIs
    Publication statusPublished - 2008

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