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Pressure effects on magnetic properties and martensitic transformation of Ni–Mn–Sn magnetic shape memory alloys

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【作者】 张雅卓； 曹伽牧； 谭昌龙； 曹一江； 蔡伟；

【Author】 Zhang Ya-Zhuo;Cao Jia-Mu;Tan Chang-Long;Cao Yi-Jiang;Cai Wei;Department of Mathematics, Harbin Institute of Technology;College of Applied Science, Harbin University of Science and Technology;School of Materials Science and Engineering, Harbin Institute of Technology;

【机构】 Department of Mathematics, Harbin Institute of Technology； College of Applied Science, Harbin University of Science and Technology； School of Materials Science and Engineering, Harbin Institute of Technology；

【摘要】 The mechanism for the effects of pressure on the magnetic properties and the martensitic transformation of Ni–Mn–Sn shape memory alloys is revealed by first-principles calculations. It is found that the total energy difference between paramagnetic and ferromagnetic austenite states plays an important role in the magnetic transition of Ni–Mn–Sn under pressure. The pressure increases the relative stability of the martensite with respect to the austenite, leading to an increase of the martensitic transformation temperature. Moreover, the effects of pressure on the magnetic properties and the martensitic transformation are discussed based on the electronic structure.

【Abstract】 The mechanism for the effects of pressure on the magnetic properties and the martensitic transformation of Ni–Mn–Sn shape memory alloys is revealed by first-principles calculations. It is found that the total energy difference between paramagnetic and ferromagnetic austenite states plays an important role in the magnetic transition of Ni–Mn–Sn under pressure. The pressure increases the relative stability of the martensite with respect to the austenite, leading to an increase of the martensitic transformation temperature. Moreover, the effects of pressure on the magnetic properties and the martensitic transformation are discussed based on the electronic structure.

【关键词】 ferromagnetic shape memory alloys； magnetic properties； martensitic transformation； electronic band structure；
【Key words】 ferromagnetic shape memory alloys； magnetic properties； martensitic transformation； electronic band structure；
【基金】 Project supported by the New Century Excellent Talents in Heilongjiang Provincial University,China(Grant No.1253-NCET-009);the Youth Academic Backbone in Heilongjiang Provincial University,China(Grant No.1251G022);the National Natural Science Foundation of China(Grant Nos.50901026 and 51301054)
  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2014年03期
  • 【分类号】TG139.6
  • 【被引频次】2
  • 【下载频次】38
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