Abstract

The crystal structure, phase transformations and magnetic properties for Ni50xCoxMn39Sn11 (x=0, 2, 4, 6) Heusler alloys have been systematically studied by means of structure and magnetism measurements. The results show that with increase of Co concentration, the martensitic transformation temperatures are obviously decreased, while the Curie temperatures of austenite are gradually increased, and they present different structures at room temperature. At the same time, with increasing Co content, the austenitic magnetism rapidly enhances, while the martensitic magnetism almost keeps unchanged. This leads to a significant improvement of difference magneti*国家自然科学基金项目11364035, 11404186和51371111,云南省科技厅应用基础研究项目2013FZ110和2012FD051,以及曲靖师范 学院创新团队研究计划项目TD201301资助 收到初稿日期: 2015-01-26,收到修改稿日期: 2015-04-28 作者简介:李 哲,男, 1981年生,副教授 DOI: 10.11900/0412.1961.2015.00071 第1010-1016页 pp.1010-1016

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