Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 21: Poster I
MA 21.55: Poster
Dienstag, 13. März 2018, 09:30–13:00, Poster A
Current induced Néel-order switching in magnetron sputtered antiferromagnetic Mn2Au — •Dominik Graulich and Markus Meinert — Center for Spineletronic Materials and Devices, Bielefeld University, Germany
Antiferromagnets which fulfill certain symmetry properties allow for an intrinsic relativistic Nèel-order spin-orbit torque (NSOT) driven by an electrical current [1]. In tetragonal Mn2Au the two antiferromagnetically coupled sublattices are inversion partners and therefore experience a staggered spin orbit field caused by the inverse spin galvanic effect (iSGE) resulting in a NSOT, which can reorient the Nèel vector L perpendicular to the applied charge current [2].
Applying the current in two orthogonal directions and readout of the two states by the planar Hall effect (PHE) or anisotropic magnetoresistance (AMR) could allow for manufacturing novel antiferromagnetic memory devices that are extraordinarily robust against external magnetic influences [3] with the state of L being long-term stable at room temperature [4].
Here, we report on our experiments on the electrical switching of L using short current pulses in expitaxial grown, magnetron sputtered Mn2Au. Our findings support the hypothesis of a thermally activated switching process [4].
J. Želzný et al., Phys. Rev. Lett. 113, 157201 (2014)
P. Wadley et al., Science 351 587 (2016)
T. Jungwirth et al., Nat. Nanotechn. 11 231 (2016)
M. Meinert et al. arxiv.org/abs/1706.06983 (2017)