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MA: Fachverband Magnetismus

MA 46: Poster II

MA 46.21: Poster

Donnerstag, 21. März 2024, 15:00–18:00, Poster C

The phenomenological model calculations for ultrafast magnetization dynamics — •Jav Davaasambuu, Tsednee Tsogbayar, and Odsuren Sarnai — Institute of Physics and Technology, MAS, Ulaanbaatar, Mongolia

We study ultrafast magnetization dynamics induced by laser heating using various phenomenological temperature models. In this work we have studied the two- and three-temperature models for nickel, iron and cobalt thin films. The temperature dynamics of the electrons, spins and lattice for thin films is investigated. From the 3TM calculation the magnetization dynamics of samples has been obtained as a function of spin temperature, while it is computed using the electron temperature in the 2TM calculation. It has been shown that demagnetization from the 3TM calculation can be clearly related to the increase of the spin temperature. For nickel, we have shown that our numerical result for magnetization is in good agreement with an experimental measurement.

Keywords: ultrafast magnetization dynamics; phenomenological model; MOKE