The stoichiometric Ni50Mn25In25 Heusler alloy transforms from a stable ferromagnetic austenitic ground state to an incommensurate modulated martensitic ground state with a progressive replacement of In with Mn without any pre-transition phases. The absence of pre-transition phases like strain glass in Ni50Mn25+x In25-x alloys is explained to be the ability of the ferromagnetic cubic structure to accommodate the lattice strain caused by atomic size differences of In and Mn atoms. Beyond the critical value of x = 8.75, the alloys undergo martensitic transformation despite the formation of ferromagnetic and antiferromagnetic clusters and the appearance of a super spin glass state.

中文翻译：

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Ni50Mn25+xIn25-x 中的晶格应变调节和不存在预过渡相

化学计量的 Ni50Mn25In25 Heusler 合金从稳定的铁磁奥氏体基态转变为不相称的调制马氏体基态，其中 In 逐渐被 Mn 取代，没有任何预过渡相。Ni50Mn25+x In25-x 合金中不存在应变玻璃等预过渡相，这被解释为铁磁立方结构能够适应由 In 和 Mn 原子的原子尺寸差异引起的晶格应变。超过 x = 8.75 的临界值，尽管形成铁磁和反铁磁簇以及超自旋玻璃态的出现，合金仍经历马氏体转变。