Abstract
We report the structural and the magnetic investigations on bulk Fe-Mn-Ga alloy and the films with a stoichiometry of 1:1:1. Both the alloy and the films reveal an unstable crystallographic structure. While the bulk alloy appears to possess a mixed ferromagnetic hexagonal structure with the presence of a (Mn/Fe)9Ga5 ξ-phase, the films have ferromagnetic cubic phases in various types of structural ordering that depend on the deposition and the annealing conditions. Exchange bias and enhanced coercivity occur simultaneously in B2-type ordered FeMnGa films, revealing an exchange coupling between coexisting antiferromagnetic and ferromagnetic phases. The experimental results are compared with the results of the first-principle calculations.
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Kudryavtsev, Y.V., Uvarov, N.V., Iermolenko, V.N. et al. Structural and magnetic properties, and electronic structures of Fe-Mn-Ga alloys. Journal of the Korean Physical Society 62, 1508–1513 (2013). https://doi.org/10.3938/jkps.62.1508
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DOI: https://doi.org/10.3938/jkps.62.1508