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Title: Two-step magnetic ordering into a canted state in ferrimagnetic monoclinic Mn3As2
Authors: Karigerasi, MH
Lam, BH
Avdeev, M
Shoemaker, DP
Keywords: Neutron diffraction
Magnetic properties
Monoclinic lattices
Issue Date: 1-Feb-2021
Publisher: Elsevier
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
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.
ISSN: 0022-4596
Appears in Collections:Journal Articles

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