title: Ultrafast spin dynamics: the effect of colored noise.
abstract: Recent experimental results have pushed the limits of magnetization dynamics to pico- and femtosecond time scales. This ultrafast dynamics occurs in extreme conditions of strong and rapid fields and high temperatures. This situation requires a new description of magnetization dynamics, taking into account that the electron correlation time could be of the order of the inverse spin frequency. For this case we introduce a thermodynamically correct phenomenological Landau-Lifshitz-Miyasaki-Seki approach. We demonstrate the effect of the noise correlation time on the ultrafast demagnetization rate.
authors.affiliation: Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain.
authors.forename: U
authors.initials: U
authors.lastname: Atxitia
authors.forename: O
authors.initials: O
authors.lastname: Chubykalo-Fesenko
authors.forename: R W
authors.initials: RW
authors.lastname: Chantrell
authors.forename: U
authors.initials: U
authors.lastname: Nowak
authors.forename: A
authors.initials: A
authors.lastname: Rebei