arXiv 1502.044482015-02-16cond-mat.mtrl-sci

Effect of local structural distortions on magnetostructural transformation in Mn$_3$SnC

E. T. Dias, K. R. Priolkar, A. Das, G. Aquilanti, Ö. Çakir, M. Acet, A. K. Nigam

备注：: 15 pages
发表信息：: J. Phys. D: Appl. Phys. 48 (2015) 295001
DOI：: 10.1088/0022-3727/48/29/295001

英文摘要：

In this paper we attempt to understand the different nature of first order magnetic transformation in Mn$_3$SnC as compared to that in Mn$_3$GaC. The transformation in Mn$_3$SnC is close to room temperature (T$_t \approx$ 280K) and is associated with a large change in magnetic entropy that makes it a suitable candidate for applications in ferroic cooling. Using a combination of x-ray and neutron diffraction and x-ray absorption fine structure (XAFS) spectroscopy we infer that the magnetic ground state consisting of antiferromagnetic and ferromagnetic Mn atoms is due to structural distortions present in Mn$_6$C octahedra.

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