Magnetic-field-induced martensitic transformation in MnNiGa:Co alloys

L. Ma, H. W. Zhang, S. Y. Yu, Zhiyong Zhu, J. L. Chen, G. H. Wu*, H. Y. Liu, J. P. Qu, Y. X. Li

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    75 Scopus citations

    Abstract

    With a high Curie temperature and low entropy change, the magnetic-field-induced martensitic transformation has been obtained in ferromagnetic shape memory alloys MnNiGa by doping a small amount of Co. Due to the ferromagnetic activation effect of Co, a large amount of antiferromagnetically aligned Mn moments are turned into ferromagnetic ordering, which is verified by our electronic structural calculation and experimental observation. Consequently, the magnetization rises up to 70 emug and the magnetization difference between two phases increases about ten times, resulting in a considerable dTdH of 4 KT and a well-defined reversed transformation induced by a magnetic field.

    Original languageEnglish (US)
    Article number032509
    JournalApplied Physics Letters
    Volume92
    Issue number3
    DOIs
    StatePublished - Feb 1 2008

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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