论文标题
ni $ _ {2-x} $ fe $ _ {x} $ mn $ _ {1.5} $ in $ _ {0.5} $的重要性和缺乏应变玻璃相位
Importance of site occupancy and absence of strain glassy phase in Ni$_{2-x}$Fe$_{x}$Mn$_{1.5}$In$_{0.5}$
论文作者
论文摘要
ni $ _ {2-x} $ fe $ _ {x} $ mn $ _ {1.5} $ in $ _ {0.5} $中的ni $ _ {2-x} $ _ {x} $ _ {0.5} $稳定下降，并以$ x $ = 0.2的完全抑制。尽管抑制了马氏体过渡，但ni $ _ {1.8} $ fe $ _ {0.2} $ mn $ _ {1.5} $ in $ _ {0.5} $不显示预期的应变玻璃阶段。取而代之的是，观察到具有主要铁磁相互作用的基态。对$ x $ = 0.2的结构和磁性性能的研究表明，合金由主要的Fe富立方相和一个较小的Fe缺陷单斜相组成，有利于铁磁基态。这与Ni $ _2 $ Mn $ _ {1-y} $ fe $ _ {y} $ in $ _ {0.5} $中观察到的完全相反，其中观察到$ y $ = 0.1的应变玻璃相。与Heusler组成中MN相比，Fe的位点对称性变化似乎支持铁磁相的生长。
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.
