Room-temperature tetragonal non-collinear Heusler antiferromagnet Pt.sub.2./sub.MnGa

0468795 - FZÚ 2017 RIV GB eng J - Článek v odborném periodiku
Singh, S. - D'Souza, S.W. - Nayak, J. - Suard, E. - Chapon, L. - Senyshyn, A. - Petříček, Václav - Skourski, Y. - Nicklas, M. - Felser, C. - Chadov, C.
Room-temperature tetragonal non-collinear Heusler antiferromagnet Pt₂MnGa.
Nature Communications. Roč. 7, Aug (2016), s. 1-6, č. článku 12671. E-ISSN 2041-1723
Grant CEP: GA MŠMT LO1603
Institucionální podpora: RVO:68378271
Klíčová slova: antiferromagnetics * spintronics * magnetic structure
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 12.124, rok: 2016

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.

Trvalý link: http://hdl.handle.net/11104/0266620