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arXiv 1507.05907cond-mat.mtrl-sci
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多功能形状记忆铁磁体在全d金属Heusler相中的实现

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

摘要:

Heusler铁磁记忆合金(FSMA)通常由过渡族d金属和主族p元素组成。在这里,我们报告的实现FSMA在Heusler阶段,完全由d金属。通过在NiMn合金中引入d金属Ti,获得了立方B2型Heusler相,有效地降低了马氏体相变温度。通过在B2型反铁磁Ni-Mn-Ti奥氏体中进一步掺杂Co原子,可建立强铁磁性。基于磁场诱发马氏体相变,观察到Ni(Co)-Mn-Ti合金的集体多功能性质。d金属不仅促进了B2型Heusler相的形成,而且还建立了强铁磁耦合,并提供了调谐马氏体相变的可能性。

英文摘要:

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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