Autoren:	Schmitt, Christin Rajan, Adithya Beneke, Grischa Kumar, Aditya Sparmann, Tobias Meer, Hendrik Bednarz, Beatrice Ramos, Rafael Niño, Miguel Angel Foerster, Michael Saitoh, Eiji Kläui, Mathias
Titel:	Mechanisms of electrical switching of ultrathin CoO/Pt bilayers
Online-Publikationsdatum:	29-Feb-2024
Erscheinungsdatum:	2024
Sprache des Dokuments:	Englisch
Zusammenfassung/Abstract:	We study current-induced switching of the Néel vector in CoO/Pt bilayers to understand the underlying antiferromagnetic switching mechanism. Surprisingly, we find that for ultrathin CoO/Pt bilayers electrical pulses along the same path can lead to an increase or decrease of the spin Hall magnetoresistance signal, depending on the current density of the pulse. By comparing these results to XMLD-PEEM imaging of the antiferromagnetic domain structure before and after the application of current pulses, we reveal the details of the reorientation of the Néel vector in ultrathin CoO(4 nm). This allows us to understand how opposite resistance changes can result from a thermomagnetoelastic switching mechanism. Importantly, our spatially resolved imaging shows that regions where the current pulses are applied and regions further away exhibit different switched spin structures, which can be explained by a spin–orbit torque-based switching mechanism that can dominate in very thin films.
DDC-Sachgruppe:	530 Physik 530 Physics
Veröffentlichende Institution:	Johannes Gutenberg-Universität Mainz
Organisationseinheit:	FB 08 Physik, Mathematik u. Informatik
Veröffentlichungsort:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-10132
Version:	Published version
Publikationstyp:	Zeitschriftenaufsatz
Weitere Angaben zur Dokumentart:	Scientific article
Nutzungsrechte:	CC BY-NC-ND
Informationen zu den Nutzungsrechten:	https://creativecommons.org/licenses/by-nc-nd/4.0/
Zeitschrift:	Nano letters 24 5
Seitenzahl oder Artikelnummer:	1471 1476
Verlag:	American Chemical Society
Verlagsort:	Washington, DC
Erscheinungsdatum:	2024
ISSN:	1530-6992
DOI der Originalveröffentlichung:	10.1021/acs.nanolett.3c02890
Enthalten in den Sammlungen:	DFG-491381577-H