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Proceedings Paper

Heat-induced magnetization dynamics due to ultrafast exchange scattering with itinerant electrons
Author(s): Alexander Baral; Svenja Vollmar; Hans Christian Schneider
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Paper Abstract

We review a recently introduced simple model that describes magnetization dynamics in a system consisting of localized and itinerant carriers which are coupled by an antiferromagnetic exchange interaction. By also introducing a Stoner-like mean-field splitting in the itinerant carrier system, the model is intended to capture some important aspects of the electronic structure and the magnetization dynamics of ferrimagnets that involve itinerant carriers, such as GdFe(Co). In the framework of this model one can describe microscopically scattering dynamics due to the exchange interaction as well as coupling to phonons. We review some details of this model and show how it explains heat-induced magnetic switching in two-sublattice ferrimagnets. Further, we discuss the inuflence of angular momentum exchange with the environment, and present results for the magnetization dynamics that result from excitation above the compensation temperature.

Paper Details

Date Published: 14 March 2016
PDF: 9 pages
Proc. SPIE 9746, Ultrafast Phenomena and Nanophotonics XX, 97461H (14 March 2016); doi: 10.1117/12.2208628
Show Author Affiliations
Alexander Baral, Technische Univ. Kaiserslautern (Germany)
Svenja Vollmar, Technische Univ. Kaiserslautern (Germany)
Graduate School of Excellence Materials Science in Mainz (Germany)
Hans Christian Schneider, Technische Univ. Kaiserslautern (Germany)

Published in SPIE Proceedings Vol. 9746:
Ultrafast Phenomena and Nanophotonics XX
Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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