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Enhancement of perpendicular magnetic anisotropy and transmission of spin-Hall-effect-induced spin currents by a Hf spacer layer in W/Hf/CoFeB/MgO layer structures
Open accessAbstract
We report that strong perpendicular magnetic anisotropy of the ferromagnetic layer in a W/CoFeB/MgO multilayer structure can be established by inserting a Hf layer as thin as 0.25 nm between the W and CoFeB layers. The Hf spacer also allows transmission of spin currents generated by an in-plane charge current in the W layer to apply strong spin torque on the CoFeB, thereby enabling current-driven magnetic switching. The antidamping-like and field-like components of the spin torque exerted on a 1 nm CoFeB layer are of comparable magnitudes in this geometry. Both components originate from the spin Hall effect in the underlying W layer.
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Cites
Hirsch, J. E. (1999) · Physical Review Letters · doi:10.1103/physrevlett.83.1834 · Cited by 3,163
Cited by
Sinova, J., Valenzuela, S. O., Wunderlich, J., Back, C. H., & Jungwirth, T. (2015) · Reviews of Modern Physics · doi:10.1103/revmodphys.87.1213 · Cited by 3,117
A strategy for the design of skyrmion racetrack memories
Tomasello, R., Martinez, E., Zivieri, R., Torres, L., Carpentieri, M., & Finocchio, G. (2014) · Scientific Reports · doi:10.1038/srep06784 · Cited by 963
Interface-induced phenomena in magnetism
Hellman, F., Hoffmann, A., Tserkovnyak, Y., Beach, G. S. D., Fullerton, E. E., Leighton, C., MacDonald, A. H., Ralph, D. C., Arena, D. A., Dürr, H. A., et al. (2017) · Reviews of Modern Physics · doi:10.1103/revmodphys.89.025006 · Cited by 927
Self-citationPai, 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
Self-citationRecent advances in spin-orbit torques: Moving towards device applications
Ramaswamy, R., Lee, J. M., Cai, K., & Yang, H. (2018) · Applied Physics Reviews · doi:10.1063/1.5041793 · Cited by 309
Metadata
- Authors
- Pai, C.-F., Nguyen, M.-H., Belvin, C., Vilela-Leão, L. H., Ralph, D. C., & Buhrman, R. A.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2014-02-24
- Volume
- 104
- Issue
- 8
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2073043194
- Cited by
- 226
- References
- 1
- FWCI
- 13.98
- Type
- journal article
- Language
- en
- Open access
- green
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- Pai, C.-F., Nguyen, M.-H., Belvin, C., Vilela-Leão, L. H., Ralph, D. C., & Buhrman, R. A. (2014). Enhancement of perpendicular magnetic anisotropy and transmission of spin-Hall-effect-induced spin currents by a Hf spacer layer in W/Hf/CoFeB/MgO layer structures. Applied Physics Letters. https://doi.org/10.1063/1.4866965
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