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Evidence of tetragonal distortion as the origin of the ferromagnetic ground state in γ-Fe nanoparticles

Augustyns, V; van Stiphout, K; Joly, V; Lima, T A L; Lippertz, G; Trekels, M; Menéndez, E; Kremer, Felipe; Wahl, U; Costa, A R G; Correia, J G; Pereira, Lino


γ-Fe and related alloys are model systems of the coupling between structure and magnetism in solids. Since different electronic states (with different volumes and magnetic ordering states) are closely spaced in energy, small perturbations can alter which one is the actual ground state. Here, we demonstrate that the ferromagnetic state of γ-Fe nanoparticles is associated with a tetragonal distortion of the fcc structure. Combining a wide range of complementary experimental techniques, including...[Show more]

CollectionsANU Research Publications
Date published: 2017
Type: Journal article
Source: Physical Review B: Condensed Matter and Materials
DOI: 10.1103/PhysRevB.96.174410
Access Rights: Open Access


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