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Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 34: Spintronics (joint session MA/TT)

MA 34.2: Vortrag

Mittwoch, 14. März 2018, 15:15–15:30, EB 202

Current induced Nèel vector manipulation in Mn2Au and associated giant anisotropic magnetoresistance — •Bodnar Stanislav1, Šmejkal Libor1,2,3, Gomonay Olena1, Sinova Jairo1, Sapozhnik Alexey1, Elmers Hans-Joachim1, Kläui Mathias1, Filianina Mariia1, and Jourdan Martin11Mainz University, Staudinger Weg 7, 55128 Mainz, Germany — 2Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnicka 10, 162 00 Praha 6, Czech Republic — 3Faculty of Mathematics and Physics, Charles University, Department of Condensed Matter Physics, Ke Karlovu 5, 12116 Praha 2, Czech Republic

Antiferromagnetic materials could be used as active elements in spintronics. This requires the ability to switch and read-out the Néel vector state. In our work we demonstrate for Mn2Au, a good conductor with a high ordering temperature suitable for applications, reproducible switching of the Nèel vector using current pulse generated bulk spin-orbit torques and read-out by magnetoresistance measurements. Reversible and consistent changes of the longitudinal resistance and planar Hall voltage of star-patterned epitaxial Mn2Au(001) thin films were generated by pulse current densities of 107 A/cm2 . The symmetry of the torques agrees with theoretical predictions and a large read-out magnetoresistance effect of more than 6 % is reproduced by ab initio transport calculations.

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