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.
Rok vydání:	2012
Předmět:	Condensed Matter - Materials Science
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
Externí odkaz:	http://arxiv.org/abs/1205.2818 Zobrazit plný text záznamu View this record from Arxiv