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Time-dependent multistate switching of topological antiferromagnetic order in Mn$_3$Sn
- Source :
- Physical Review Applied, 18 (2)
- Publication Year :
- 2022
-
Abstract
- The manipulation of antiferromagnetic order by means of spin-orbit torques opens unprecedented opportunities to exploit the dynamics of antiferromagnets in spintronic devices. In this work, we investigate the current-induced switching of the magnetic octupole vector in the Weyl antiferromagnet Mn$_3$Sn as a function of pulse shape, field, temperature, and time. We find that the switching behavior can be either bistable or tristable depending on the temporal structure of the current pulses. Time-resolved Hall effect measurements reveal that Mn$_3$Sn switching proceeds via a two-step demagnetization-remagnetization process caused by self-heating over a timescale of tens of ns followed by cooling in the presence of spin-orbit torques. Our results shed light on the switching dynamics of Mn$_3$Sn and prove the existence of extrinsic limits on its switching speed.<br />Rectified wrong order of MS and Supplement
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Physical Review Applied, 18 (2)
- Accession number :
- edsair.doi.dedup.....d8670ac822115b4e114454fb46c9e279