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Central role of domain wall depinning for perpendicular magnetization switching driven by spin torque from the spin Hall effect
Open accessAbstract
We study deterministic magnetic reversal of a perpendicularly magnetized Co layer in a Co/MgO/Ta nanosquare driven by spin Hall torque from an in-plane current flowing in an underlying Pt layer. The rate-limiting step of the switching process is domain wall (DW) depinning by spin Hall torque via a thermally assisted mechanism that eventually produces full reversal by domain expansion. An in-plane applied magnetic field collinear with the current is required, with the necessary field scale set by the need to overcome DW chirality imposed by the Dzyaloshinskii-Moriya interaction. Once Joule heating is taken into account the switching current density is quantitatively consistent with a spin Hall angle ${\ensuremath{\theta}}_{SH}\ensuremath{\approx}0.07$ for 4 nm of Pt.
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Hirsch, J. E. (1999) · Physical Review Letters · doi:10.1103/physrevlett.83.1834 · Cited by 3,163
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Pai, C.-F., Ou, Y., Vilela-Leão, L. H., Ralph, D. C., & Buhrman, R. A. (2015) · Physical Review B · doi:10.1103/physrevb.92.064426 · Cited by 511
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Metadata
- Authors
- Lee, O. J., Liu, L. Q., Pai, C. F., Li, Y., Tseng, H. W., Gowtham, P. G., Park, J. P., Ralph, D. C., & Buhrman, R. A.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2014-01-28
- Volume
- 89
- Issue
- 2
- ISSN
- 1098-0121 (ISSN-L)
- 1550-235X
- OpenAlex
- W2335301680
- Cited by
- 303
- References
- 1
- FWCI
- 14.97
- Type
- journal article
- Language
- en
- Open access
- green
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- Lee, O. J., Liu, L. Q., Pai, C. F., Li, Y., Tseng, H. W., Gowtham, P. G., Park, J. P., Ralph, D. C., & Buhrman, R. A. (2014). Central role of domain wall depinning for perpendicular magnetization switching driven by spin torque from the spin Hall effect. Physical Review B. https://doi.org/10.1103/physrevb.89.024418
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