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 language | English |
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Title of host publication | Proceedings of the 5th International Symposium on Metallic Multilayers (MML 2004), 7-11 June 2004, Boulder, Colorado, U.S.A. |
Publication status | Published - 2004 |
Event | conference; 5th International Symposium on Metallic Multilayers (MML 2004) - Duration: 1 Jan 2004 → … |
Conference
Conference | conference; 5th International Symposium on Metallic Multilayers (MML 2004) |
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Period | 1/01/04 → … |
Other | 5th International Symposium on Metallic Multilayers (MML 2004) |