Room-temperature tetragonal non-collinear Heusler antiferromagnet Pt 2 MnGa
Singh S, D'Souza SW, Nayak J, Suard E, Chapon LC, Senyshyn A, Petricek V, Skourski Y, Nicklas M, Felser C, Chadov S (2016)
Publication Type: Journal article
Publication year: 2016
Journal
Book Volume: 7
Article Number: 12671
DOI: 10.1038/ncomms12671
Abstract
Antiferromagnetic spintronics is a rapidly growing field, which actively introduces new principles of magnetic storage. Despite that, most applications have been suggested for collinear antiferromagnets. In this study, we consider an alternative mechanism based on long-range helical order, which allows for direct manipulation of the helicity vector. As the helicity of long-range homogeneous spirals is typically fixed by the Dzyaloshinskii-Moriya interactions, bi-stable spirals (left- and right-handed) are rare. Here, we report a non-collinear room-temperature antiferromagnet in the tetragonal Heusler group. Neutron diffraction reveals a long-period helix propagating along its tetragonal axis. Ab-initio analysis suggests its pure exchange origin and explains its helical character resulting from a large basal plane magnetocrystalline anisotropy. The actual energy barrier between the left- and right-handed spirals is relatively small and might be easily overcome by magnetic pulse, suggesting Pt 2 MnGa as a potential candidate for non-volatile magnetic memory.
Involved external institutions
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
Institute Laue-Langevin (ILL)
France (FR)
Technische Universität München (TUM)
Germany (DE)
Institute of Physics of the Czech Academy of Sciences / Fyzikální ústav Akademie věd České republiky (FZU)
Czech Republic (CZ)
Helmholtz-Zentrum Dresden-Rossendorf (HZDR)
Germany (DE)
Germany (DE)
Institute Laue-Langevin (ILL)
France (FR)
Technische Universität München (TUM)
Germany (DE)
Institute of Physics of the Czech Academy of Sciences / Fyzikální ústav Akademie věd České republiky (FZU)
Czech Republic (CZ)
Helmholtz-Zentrum Dresden-Rossendorf (HZDR)
Germany (DE)
How to cite
APA:
Singh, S., D'Souza, S.W., Nayak, J., Suard, E., Chapon, L.C., Senyshyn, A.,... Chadov, S. (2016). Room-temperature tetragonal non-collinear Heusler antiferromagnet Pt 2 MnGa. Nature Communications, 7. https://doi.org/10.1038/ncomms12671
MLA:
Singh, Sanjay, et al. "Room-temperature tetragonal non-collinear Heusler antiferromagnet Pt 2 MnGa." Nature Communications 7 (2016).
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