Investigations on the electronic, structural, magnetic properties related to shape-memory behavior in Ti2CoX (X=Al, Ga, In)

Investigations on the electronic, structural, magnetic properties related to shape-memory behavior in Ti2CoX (X=Al, Ga, In)
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Ti2CoX(X=Al、Ga、In)中与形状记忆行为相关的电子、结构、磁性特性的研究

DOI:
10.1016/j.materresbull.2014.11.036
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发表时间:
2015-02
影响因子:
5.4
通讯作者:
Yong-Zhong Xing
Yong-Zhong Xing
中科院分区:
材料科学2区
文献类型:
--
作者:
Xiao-Wei Sun;Yan E;Jian-Bo Deng;Yong-Zhong Xing

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采用全势能局域轨道最小基方法,对Ti 2CoX(X=Al,Ga,In)合金的电子、结构和磁性进行了系统的研究.结果表明,这些合金是半金属铁磁体,在奥氏体相中的总磁矩为2μ B/分子单位,在低温下发生马氏体相变。Ti_2CoX(X=Al,Ga,In)马氏体相的相对稳定性有很大的不同。电子结构的细节表明,在磁性组件之间的杂交的差异是负责的趋势相。的能量和磁化的定量估计表明,Ti 2CoGa是一个有前途的候选人的形状记忆应用。
Using the full-potential local orbital minimum-basis method, we have performed a systematic investigations on the electronic, structural, and magnetic properties related to shape memory applications for Ti2CoX(X=Al, Ga, In) alloys. Our results confirm that these alloys are half-metallic ferromagnets with total magnetic moment of 2μBper formula unit in austenite phase, and undergo a martensitic transformation at low temperatures. The relative stabilities of the martensitic phases differ considerably between Ti2CoX(X=Al, Ga, In). Details of the electronic structures suggest that the differences in hybridizations between the magnetic components are responsible for trends of phase. Quantitative estimates for the energetics and the magnetizations indicate that Ti2CoGa is a promising candidate for shape memory applications.
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