# Laser induced ultrafast demagnetization: an \\emph{ab-initio} perspective

Source: [Laser induced ultrafast demagnetization: an \\emph{ab-initio} perspective](<https://www.sota2.com/research/paper/68fa2d631e209131ce858f30>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T16:14:02.803Z

Authors: K. Krieger, J. K. Dewhurst, P. Elliott, S. Sharma, E. K. U. Gross

Published: 2014-06-25T15:18:31.000Z

## Abstract

Time-dependent density functional theory is implemented in an all electron solid-state code for the case of fully non-collinear spins. We use this to study laser induced demagnetization in Fe, Co and Ni. It is shown that this demagnetization is a two-step process: excitation of a fraction of electrons followed by spin-flip transitions of the remaining localized electrons. These results successfully explain several experimental features such as the time-lag between the start of the pulse and demagnetization and spin-flip excitations dominating the physics. We further show that it is possible to control the moment loss by tunable laser parameters like frequency, duration and intensity.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1406.6607>)

[PDF](<https://arxiv.org/pdf/1406.6607.pdf>)