Ultrafast Time-Resolved Faraday Rotation in EuO Thin Films
Autor: | Liu, F., Makino, T., Yamazaki, T., Ueno, K., Tsukazaki, A., Fukumura, T., Kong, Y., Kawasaki, M. |
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Rok vydání: | 2012 |
Předmět: | |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevLett.108.257401 |
Popis: | We have investigated the ultrafast spin dynamics in EuO thin films by time-resolved Faraday rotation spectroscopy. The photoinduced magnetization is found to be increased in a transient manner, accompanied with subsequent demagnetization. The dynamical magnetization enhancement showed a maximum slightly below the Curie temperature with prolonged tails toward both lower and higher temperatures and dominates the demagnetization counterpart at 55 K. The magnetization enhancement component decays in ~1 ns. The realization of the transient collective ordering is attributable to the enhancement of the f-d exchange interaction. Comment: 8 pages, 4 figures, accepted for publication in Phys. Rev. Lett |
Databáze: | arXiv |
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