28 August 2014 Ultrafast spin dynamics in metallic layers and strongly correlated oxides
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Abstract
The spin dynamics triggered by an ultrashort optical excitation can lead to a variety of behaviors depending on the specific spin and electronic structure of the material. In metallic films, electron-quasiparticles (phonons and magnons) interactions takes place on sub-picosecond timescale and demagnetization is established within 100 fs. In half-metal oxides, spin dynamics is much slower (100 ps) due to the inhibition of spin-flip processes. Furthermore, the dynamics of magnetic anisotropies can be exploited to control the magnetization in ferromagnets. Optically-induced reversible switching of the magnetization has been recently demonstrated in thin magnetic layers on the 100 picoseconds timescale.
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Ettore Carpene, Fabio Boschini, Hamoon Hedayat, Claudia Dallera, Ezio Puppin, "Ultrafast spin dynamics in metallic layers and strongly correlated oxides", Proc. SPIE 9167, Spintronics VII, 91672D (28 August 2014); doi: 10.1117/12.2061653; https://doi.org/10.1117/12.2061653
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