Berlin 2018 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 51: Magnetic textures II

MA 51.5: Vortrag

Donnerstag, 15. März 2018, 16:00–16:15, EB 407

Modulated magnetic texture of the Heusler compound Mn-Pt-Ir-Sn studied by SANS — •Aleksandr Sukhanov¹, Praveen Vir¹, Alistair Cameron², Andre Heinemann³, Dmytro Inosov², and Claudia Felser¹ — ¹Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany — ²Institut fuer Festkoerperphysik, TU Dresden, D-01069 Dresden, Germany — ³German Engineering Materials Science Centre (GEMS) at Heinz Maier-Leibnitz Zentrum (MLZ), Helmholtz-Zentrum Geesthacht GmbH, 85747 Garching bei Muenchen, Germany

Mn_1.4PtSn belongs to the family of tetragonally-distorted Heulser compounds where non-collinear magnetic order is expected to appear as a result of competition between Heisenberg exchange interaction, the Dzyaloshinskii-Moriya interaction and uniaxial magnetocrystalline anisotropy. Recent examples include the canted antiferromagnetic order in the compound Mn₂RhSn and the lattice of antiskyrmions in Mn_1.4Pt_0.9Pd_0.1Sn, which is a structural analogue of the discussed compound [1,2]. Small-angle neutron scattering experiments on an oriented single crystal of Mn_1.4PtSn revealed highly-anisotropic nature of the spatial spin-spin correlation function in the range of 100 nm. The latter might be associated with a long-range fluctuation of the ferromagnetic order along one of the principal in-plane crystallographic directions. The scattering patterns show clear dependence on the temperature and the applied magnetic field.

[1] O. Meshcheriakova et al., Phys. Rev. Lett. 113, 087203 (2014)

[2] A. K. Nayak et al., Nature 548, 561 (2017)