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- Unikandanunni, Vivek, et al.
(författare)
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Anisotropic ultrafast spin dynamics in epitaxial cobalt
- 2021
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Ingår i: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 118:23
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Tidskriftsartikel (refereegranskat)abstract
- We investigate the ultrafast spin dynamics in an epitaxial hcp(11⎯⎯00) cobalt thin film. By performing pump-probe magneto-optical measurements with the magnetization along either the easy or hard magnetic axis, we determine the demagnetization and recovery time for the two axes. We observe an average of 33% slower dynamics along the easy magnetization axis, which we attribute to magneto-crystalline anisotropy of the electron-phonon coupling, supported by our ab initio calculations. This points toward an unambiguous and previously undisclosed role of anisotropic electron–lattice coupling in ultrafast magnetism.
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