Abstract Structural and magnetic properties of the disordered and ordered Fe2MnAl Heusler alloys have systematically been investigated by local and bulk experimental methods. Plastic deformation, induced by cold-work, leads to a structural phase transformation from the ordered L21 to a disordered A2-structure, concomitantly with a change from paramagnetic PM to ferromagnetic FM state; an effect attributed to the strain-induced ferromagnetism. This transition is explained assuming a gradual transformation of the L21-structure to the anti-phase boundary APB tubes, which result in Fe-cluster formation. Plastic deformed ribbon annealed at low temperatures (Tan 673 K) favors a strong Mn segregation, concomitantly with formation of disordered Fe-Mn-Al alloys that also have magnetic ordering temperature approaching to 300 K.

中文翻译：

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Fe 2 MnAl 中塑性变形诱导铁磁性：探测 Fe 磁性

摘要 通过局部和本体实验方法系统地研究了无序和有序的 Fe2MnAl Heusler 合金的结构和磁性能。冷加工引起的塑性变形导致从有序 L21 到无序 A2 结构的结构相变，伴随着从顺磁 PM 到铁磁 FM 状态的变化；归因于应变诱导的铁磁性的效应。假设 L21 结构逐渐转变为反相边界 APB 管，从而导致 Fe 簇的形成，可以解释这种转变。在低温 (Tan 673 K) 下退火的塑性变形带有利于强烈的 Mn 偏析，同时形成无序的 Fe-Mn-Al 合金，其磁性有序温度也接近 300 K。