(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China)
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DOI:
10.7502/j.issn.1674-3962.2012.04.02
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Abstract:
The Ni2In-type hexagonal MM′X alloys is a new kind of potential magnetic phase transition functional materials. Based on the magnetic martensitic transformation, they exhibit excellent magnetic field induced martensitic transformation and magnetocaloric effects. The structure, magnetism and research history of MM′X alloys are introduced, and, the recent investigation progress of the magnetoresponsive properties are summarized. The ideas, methods and results during the exploration and improvement of the representative MnNiGe and MnCoGe systems are clarified. The tailoring and realizing of the magnetostructural transitions, especially the building of Curie temperature windows for paramagneticferromagnetic martensitic transformations, are intensively shown. An outlook for the potential applications and advantages of MM′X alloys are also given.