A multiscale model of the effect of Ir thickness on the static and dynamic properties of Fe/Ir/Fe films

CUADRADO, Ramón, OROSZLÁNY, László, SZUNYOGH, László, HRKAC, Gino, CHANTRELL, Roy and OSTLER, Thomas (2018). A multiscale model of the effect of Ir thickness on the static and dynamic properties of Fe/Ir/Fe films. Scientific Reports, 8 (3879), 1-13.

[img]
Preview
PDF
s41598-018-21934-5.pdf - Published Version
Creative Commons Attribution.

Download (3MB) | Preview
Official URL: https://www.nature.com/articles/s41598-018-21934-5
Link to published version:: https://doi.org/10.1038/s41598-018-21934-5

Abstract

The complex magnetic properties of Fe/Ir/Fe sandwiches are studied using a hierarchical multi-scale model. The approach uses first principles calculations and thermodynamic models to reveal the equilibrium spinwave, magnetization and dynamic demagnetisation properties. Finite temperature calculations show a complex spinwave dispersion and an initially counter-intuitive, increasing exchange stiffness with temperature (a key quantity for device applications) due to the effects of frustration at the interface, which then decreases due to magnon softening. Finally, the demagnetisation process in these structures is shown to be much slower at the interface as compared with the bulk, a key insight to interpret ultrafast laser-induced demagnetization processes in layered or interface materials.

Item Type: Article
Departments: Faculty of Science, Technology and Arts > Engineering and Mathematics
Identification Number: https://doi.org/10.1038/s41598-018-21934-5
Depositing User: Thomas Ostler
Date Deposited: 01 Mar 2018 13:28
Last Modified: 01 Mar 2018 19:42
URI: http://shura.shu.ac.uk/id/eprint/18818

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics