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Updated: Jun 8, 2026

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
Published on: September 2, 2016
Superdiffusive spin transport as a mechanism of ultrafast demagnetization
M Battiato1, K Carva, P M Oppeneer
1Department of Physics and Astronomy, Uppsala University, Box 516, SE-75120 Uppsala, Sweden. marco.battiato@fysik.uu.se
Abstract:
We propose a semiclassical model for femtosecond laser-induced demagnetization due to spin-polarized excited electron diffusion in the superdiffusive regime. Our approach treats the finite elapsed time and transport in space between multiple electronic collisions exactly, as well as the presence of several metal films in the sample. Solving the derived transport equation numerically we show that this mechanism accounts for the experimentally observed demagnetization within 200 fs in Ni, without the need to invoke any angular momentum dissipation channel.
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