Microscopic model for fs magnetization dynamics

B. Koopmans, H.H.J.E. Kicken, M. Kampen, van, W.J.M. Jonge, de

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

Abstract

Over the past few years a wealth of new data on laser-induced ultrafast magnetization dynamics has become available. By now, it is generally agreed on that within a few hundred femtoseconds after laser excitation of ferromagnetic transition metals such as nickel the spin system equilibrates at a reduced magnetization. As to the underlying physics that enables such an ultrafast response little is known. In this presentation we report first results of a fully microscopic approach based on a simple model Hamiltonian that describes the interactions between a Fermi sea of (spinless) electrons, an ensemble of two level oscillators representing the phonon system, and a magnetic degree of freedom described by a Weiss model. In particular we include an Elliot-Yafet type of spin-orbit induced spin scattering by assigning a spin- flip probability aEY to each electron-phonon (e-p) scattering event. The e-
Original languageEnglish
Title of host publicationProceedings of the 5th International Symposium on Metallic Multilayers (MML 2004), 7-11 June 2004, Boulder, Colorado, U.S.A.
Publication statusPublished - 2004
Eventconference; 5th International Symposium on Metallic Multilayers (MML 2004) -
Duration: 1 Jan 2004 → …

Conference

Conferenceconference; 5th International Symposium on Metallic Multilayers (MML 2004)
Period1/01/04 → …
Other5th International Symposium on Metallic Multilayers (MML 2004)

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