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Condensed Matter > Mesoscale and Nanoscale Physics

arXiv:1503.00076 (cond-mat)
[Submitted on 28 Feb 2015]

Title:Ultrafast Switching of Antiferromagnets via Spin-transfer Torque

Authors:Ran Cheng, Matthew W. Daniels, Jian-Gang Zhu, Di Xiao
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Abstract:Picosecond switching of the staggered antiferromagnetic order is shown to be realizable through spin-transfer torques from a short current pulse. The coupled dynamics of sublattice magnetization is mapped onto a classical pendulum subject to gravity and a driving pulse, where switching occurs if the pendulum acquires sufficient kinetic energy during the pulse to overcome the maximum of the effective gravity potential. The optimal switching scheme is explored through the dependence of switch angle and magnetic loss on the duration and strength of the current pulse. The physics discussed here provides a general route towards multi-functional THz applications via the spin-transfer torque in antiferromagnetic materials.
Comments: 5 pages, 4 figures
Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Materials Science (cond-mat.mtrl-sci)
Cite as: arXiv:1503.00076 [cond-mat.mes-hall]
  (or arXiv:1503.00076v1 [cond-mat.mes-hall] for this version)
  https://doi.org/10.48550/arXiv.1503.00076
Journal reference: Phys. Rev. B 91, 064423 (2015)
Related DOI: https://doi.org/10.1103/PhysRevB.91.064423

Submission history

From: Ran Cheng [view email]
[v1] Sat, 28 Feb 2015 06:33:42 UTC (3,594 KB)
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