Realization of multifunctional shape-memory ferromagnets in all- d -metal Heusler phases

作者：Zhiyang Wei, Enke Liu, Jinhui Chen, Yong Li, Guodong Liu, Hongzhi Luo, Xuekui Xi, Huawei Zhang, W. H. Wang, Guangheng Wu · 发表于：Applied Physics Letters · 年份：2015 · DOI：10.1063/1.4927058 · 被引用次数：249 · 研究领域：Shape Memory Alloy Transformations、Heusler alloys: electronic and magnetic properties、Multiferroics and related materials

Heusler ferromagnetic shape-memory alloys (FSMAs) normally consist of transition-group d-metals and main-group p-elements. Here, we report the realization of FSMAs in Heusler phases that completely consist of d metals. By introducing the d-metal Ti into NiMn alloys, cubic B2-type Heusler phase is obtained and the martensitic transformation temperature is decreased efficiently. Strong ferromagnetism is established by further doping Co atoms into the B2-type antiferromagnetic Ni-Mn-Ti austenite. Based on the magnetic-field-induced martensitic transformations, collective multifunctional properties are observed in Ni(Co)-Mn-Ti alloys. The d metals not only facilitate the formation of B2-type Heusler phases but also establish strong ferromagnetic coupling and offer the possibility to tune the martensitic transformation.