Abstract In this paper we attempt to understand the role of tin and carbon in magnetic interactions in Mn 3 SnC. Mn 3 SnC exhibits a time dependent magnetic configuration and a complex magnetic ground state with both ferromagnetic and antiferromagnetic orders. Such a magnetic state is attributed to presence of distorted Mn 6 C octahedra with long and short Mn–Mn bonds. Our studies show that C deficiency increases the tensile strain on the Mn 6 C octahedra which elongates Mn–Mn bonds and strengthens ferromagnetic interactions while Sn deficiency tends to ease out the strain resulting in shorter as well as longer Mn–Mn bond distances in comparison with stoichiometric Mn 3 SnC. Such a variation strengthens both, ferromagnetic and antiferromagnetic interactions. Thus the structural strain caused by both Sn and C is responsible for complex magnetic ground state of Mn 3 SnC.

中文翻译：

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锡和碳在 Mn3SnC 磁相互作用中的作用

摘要 在本文中，我们试图了解锡和碳在 Mn 3 SnC 磁相互作用中的作用。Mn 3 SnC 表现出随时间变化的磁性构型和具有铁磁和反铁磁顺序的复杂磁基态。这种磁性状态归因于具有长短 Mn-Mn 键的扭曲 Mn 6 C 八面体的存在。我们的研究表明，C 缺乏会增加 Mn 6 C 八面体的拉伸应变，从而拉长 Mn-Mn 键并加强铁磁相互作用，而 Sn 缺乏倾向于缓和应变，导致 Mn-Mn 键距与化学计量的Mn 3 SnC。这种变化增强了铁磁和反铁磁相互作用。