Effect of Co substitution on magnetic properties of Ni-Mn-Sn magnetic shape memory alloys  

Co掺杂对Ni-Mn-Sn铁磁形状记忆合金磁性质的影响(英文)

作　　者：曹伽牧[1] 谭昌龙[1] 田晓华[1] 李钦赐 郭二军[2] 王丽萍[2] 曹一江[1] 

机构地区：[1]哈尔滨理工大学应用科学学院,哈尔滨150080 [2]哈尔滨理工大学材料科学与工程学院,哈尔滨150080

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第4期1053-1057,共5页中国有色金属学报（英文版）

基　　金：Project (1253-NCET-009) supported by Program for New Century Excellent Talents in Heilongjiang Provincial University,China;Project (1251G022) supported by Program for Youth Academic Backbone in Heilongjiang Provincial University,China;Projects (50901026,51301054) supported by the National Natural Science Foundation of China

摘　　要：The effect of Co substitution on magnetic properties of Ni-Mn-Sn shape memory alloy was revealed by first-principles calculations. Large magnetization difference in Ni-Mn-Sn alloy obtained by addition of Co arises from enhancement of magnetization of austenite due to change of Mn-Mn interaction from anti-ferromagnetism to ferromagnetism. Total energy difference between paramagnetic and ferromagnetic austenite plays an important role in magnetic transition of Ni-Co-Mn-Sn. The altered Mn 3d states due to Co substitution give rise to difference in magnetic properties.采用第一性原理计算揭示了Co掺杂对Ni-Mn-Sn形状记忆合金磁性质的影响。结果表明,掺杂Co使Ni-Mn-Sn合金中两相饱和磁化强度差增大的原因在于其奥氏体的Mn-Mn磁交换作用由反铁磁性转变为铁磁性。奥氏体的顺磁态与铁磁态的能量差对Ni-Co-Mn-Sn的磁转变有重要影响。此外,Co掺杂对磁性的影响与Mn 3d态的改变有关。

关 键 词：ferromagnetic shape memory alloys Ni-Mn-Sn first-principles calculation magnetic properties 

分 类 号：TG139.6[一般工业技术—材料科学与工程]