arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.00256cond-mat.mtrl-sci
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Ni $_{2-x}$ Fe PDMATHAAB Mn $_{1.5}$ In $_{0.5}$中占位和无应变玻璃相的重要性

Importance of site occupancy and absence of strain glassy phase in Ni$_{2-x}$Fe$_{x}$Mn$_{1.5}$In$_{0.5}$

R. Nevgi, Gangadhar Das, M. Acet, K. R. Priolkar

摘要:

马氏体转变温度在Ni $_{2-x}$ Fe $_{x}$ Mn $_{1.5}$ In $_{0.5}$中稳定地降低,并且在$x$ = 0.2时被完全抑制。尽管抑制马氏体相变,但Ni $_{1.8}$ Fe $_{0.2}$ Mn $_{1.5}$ In $_{0.5}$不显示预期的应变玻璃相。相反,观察到具有主导铁磁相互作用的基态。$x$ = 0.2的结构和磁性的研究表明,该合金由主要的富铁立方相和少量的缺铁单斜相有利于铁磁基态。这与在Ni $_2$ Mn $_{1-y}$ Fe $_{y}$ In $_{0.5}$中观察到的正好相反,其中对于$y$ = 0.1观察到应变玻璃相。Fe在Heusler组合物中掺杂Ni时与Mn相比的位置对称性的变化似乎支持铁磁相的生长。

英文摘要:

Martensitic transition temperature steadily decreases in Ni$_{2-x}$Fe$_{x}$Mn$_{1.5}$In$_{0.5}$ and is completely suppressed at $x$ = 0.2. Despite suppression of martensitic transition, Ni$_{1.8}$Fe$_{0.2}$Mn$_{1.5}$In$_{0.5}$ does not display the expected strain glassy phase. Instead, a ground state with dominant ferromagnetic interactions is observed. A study of structural and magnetic properties of $x$ = 0.2 reveal that the alloy consists of a major Fe rich cubic phase and a minor Fe deficient monoclinic phase favoring a ferromagnetic ground state. This is exactly opposite of that observed in Ni$_2$Mn$_{1-y}$Fe$_{y}$In$_{0.5}$ wherein a strain glassy phase is observed for $y$ = 0.1. The change in site symmetry of Fe when doped for Ni in contrast to Mn in the Heusler composition seems to support the growth of the ferromagnetic phase.

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