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arXiv · 1810.07482

Role of Tin and Carbon in the magnetic interactions in Mn$_3$SnC

V. N. Gaonkar·E. T. Dias·Arka Bikash Dey·Rajendra Prasad Giri·A. K. Nigam·K. R. Priolkar
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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.

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V. N. Gaonkar, E. T. Dias, Arka Bikash Dey, Rajendra Prasad Giri, A. K. Nigam, K. R. Priolkar. 2018-10-17. Role of Tin and Carbon in the magnetic interactions in Mn$_3$SnC. https://doi.org/10.1016/j.jmmm.2018.09.070

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