中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 24 No. 4 April 2014 |
（1. School of Applied Science, Harbin University of Science and Technology, Harbin 150080, China;
2. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China）
Abstract: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.
Key words: ferromagnetic shape memory alloys; Ni-Mn-Sn; first-principles calculation; magnetic properties
