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arXiv · 1507.05907

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

Z. Y. Wei·E. K. Liu·J. H. Chen·Y. Li·G. D. Liu·H. Z. Luo·X. K. Xi·H. W. Zhang·W. H. Wang·G. H. Wu
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Abstract

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.

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Z. Y. Wei, E. K. Liu, J. H. Chen, Y. Li, G. D. Liu, H. Z. Luo, X. K. Xi, H. W. Zhang, W. H. Wang, G. H. Wu. 2015-07-21. Realization of multifunctional shape-memory ferromagnets in all-d-metal Heusler phases. https://doi.org/10.1063/1.4927058

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