Time-dependent multistate switching of topological antiferromagnetic order in Mn${}_3$Sn

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.

Rectified wrong order of MS and Supplement

References in corpus (12)

• Electrical Manipulation of a Topological Antiferromagnetic State
• Single-shot dynamics of spin-orbit torque and spin transfer torque switching in three-terminal magnetic tunnel junctions
• Perspective on Metallic Antiferromagnets
• Quantum sensing and imaging of spin-orbit-torque-driven spin dynamics in noncollinear antiferromagnet Mn3Sn
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• Kondo physics in antiferromagnetic Weyl semimetal Mn3+xSn1-x films
• Comparing the anomalous Hall effect and the magneto-optical Kerr effect through antiferromagnetic phase transitions in Mn${}_3$Sn
• Observation of current-induced switching in non-collinear antiferromagnetic IrMn${}_3$ by differential voltage measurements
• Real-time Hall-effect detection of current-induced magnetization dynamics in ferrimagnets
• Robust spin-transfer torque and magnetoresistance in non-collinear antiferromagnetic junctions
• Current-induced fragmentation of antiferromagnetic domains
• Systematic study of nonmagnetic resistance changes due to electrical pulsing in single metal layers and metal/antiferromagnet bilayers

Cited by in corpus (12)

• Ultrafast Dynamics of Intrinsic Anomalous Hall Effect in the Topological Antiferromagnet Mn3Sn
• Nanoscale magnetic domains in polycrystalline Mn3Sn films imaged by a scanning single-spin magnetometer
• Order parameter dynamics in Mn${}_3$Sn driven by DC and pulsed spin-orbit torques
• Deterministic and stochastic aspects of current-induced magnetization reversal in perpendicular nanomagnets
• Impact of strain on the SOT-driven dynamics of thin film Mn${}_3$Sn
• Spin-orbit torques and magnetization switching in Gd/Fe multilayers generated by current injection in NiCu alloys
• Interfacial Dzyaloshinskii-Moriya interaction in nonmagnetic/noncollinear-antiferromagnetic bilayers
• Nanoscale quantum imaging of field-free deterministic switching of a chiral antiferromagnet
• Micromagnetic simulations for magnetic multipoles
• Imprinting electrically switchable scalar spin chirality by anisotropic strain in a Kagome antiferromagnet
• Orthogonal Spin-Orbit Torque-Induced Deterministic Switching in NiO
• Efficient spin-pumping and spin transport across epitaxial Mn${}_3$Sn(0001) noncollinear antiferromagnet/permalloy interfaces