Two-step magnetic ordering into a canted state in ferrimagnetic monoclinic Mn3As2
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Date
2021-02-01
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Elsevier
Abstract
We report the magnetic structure of monoclinic Mn3As2 at 3 K and 250 K using neutron powder diffraction measurements. From magnetometry data, the Curie temperature of Mn3As2 was confirmed to be around 270 K. Calorimetry analysis showed the presence of another transition at 225 K. At 270 K, Mn3As2 undergoes a k=0 ferrimagnetic ordering in the magnetic space group C2/m (#12.58) with Mn moments pointing along b. Below 225 K, there is a canting of Mn moments in the ac plane which produces a multi-k non-collinear magnetic structure in space group C2/c (#15.85). The components of Mn moments along b follow k=0 ordering and the components along a and c have k=[0012] propagation vector. The change in the magnetic ground state with temperature provides a deeper insight into the factors that govern magnetic ordering in Mn–As compounds. © 2020 Elsevier Inc.
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Keywords
Neutron diffraction, Magnetic properties, Ferrimagnetism, Anisotropy, Monoclinic lattices, Spin
Citation
Karigerasi, M. H., Lam, B. H., Avdeev, M., & Shoemaker, D. P. (2021). Two-step magnetic ordering into a canted state in ferrimagnetic monoclinic Mn3As2. Journal of Solid State Chemistry, 294, 121901. doi:10.1016/j.jssc.2020.121901