Dresden 2020 – scientific programme

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MA: Fachverband Magnetismus

MA 46: Spin: Transport, Orbitronics and Hall Effects I

MA 46.7: Talk

Thursday, March 19, 2020, 11:00–11:15, HSZ 403

Non-local magnetoresistance in antiferromagnetic insulator/Pt heterostructures — •Richard Schlitz¹, Tobias Kosub², Artur Erbe², Denys Makarov², and Sebastian T. B. Goennenwein¹ — ¹Institut für Festkörper- und Materialphysik, Technische Universität Dresden and Würzburg-Dresden Cluster of Excellence ct.qmat, 01062 Dresden, Germany — ²Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany

Non-local magnon mediated magnetoresistance allows to study the transport properties of pure spin currents in ferromagnetic and antiferromagnetic insulators interfaced with a heavy metal like platinum [1, 2]. Recent results suggest that even spin superfluidity can be present in such bilayers, and that it can be detected via the non-local magnetoresistance [3].

In this work, we discuss the thermally driven local and non-local magnetoresistance experimentally observed in antiferromagnetic insulator / Pt heterostructures. We observe the characteristic fingerprint of non-local transport via angle-resolved measurements of the non-local signal. Additionally, we address the impact of contact separation and magnetic field magnitude and critically compare our data to the results presented previously.
[1] L. J. Cornelissen et al.. Nature Physics 11, 1022-1026 (2015)

[2] R. Lebrun et al.. Nature 561, 222-225 (2018)

[3] W. Yuan et al.. Science Advances 4, eaat1097 (2018)