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| Hauptseite > Publikationsdatenbank > First-principles investigation of spin-wave dispersions in surface-reconstructed Co thin films on W(110) |
| Hauptseite > Publikationsdatenbank > First-principles investigation of spin-wave dispersions in surface-reconstructed Co thin films on W(110) |
| Journal Article | FZJ-2017-03002 |
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2017
Inst.
Woodbury, NY
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Please use a persistent id in citations: http://hdl.handle.net/2128/14201 doi:10.1103/PhysRevB.95.134408
Abstract: We computed spin-wave dispersions of surface-reconstructed Co films on the W(110) surface in the adiabatic approximation. The magnetic exchange interactions are obtained via first-principles electronic-structure calculations using the Korringa-Kohn-Rostoker Green-function method. We analyze the strength and oscillatory behavior of the intralayer and interlayer magnetic interactions and investigate the resulting spin-wave dispersions as a function of the thickness of Co films. In particular, we highlight and explain the strong impact of hybridization of the electronic states at the Co-W interface on the magnetic exchange interactions and on the spin-wave dispersions. We compare our results to recent measurements based on electron-energy-loss spectroscopy [E. Michel, H. Ibach, and C. M. Schneider, Phys. Rev. B 92, 024407 (2015)]. Good overall agreement with experimental findings can be obtained by considering the possible overestimation of the spin splitting, stemming from the local-spin-density approximation, and adopting an appropriate correction.
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