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 W.; Ostler, Thomas A.

doi:10.1038/s41598-018-21934-5

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 W.; Ostler, Thomas A.

Authors

Ramón Cuadrado

László Oroszlány

László Szunyogh

Gino Hrkac

Roy W. Chantrell

Thomas A. Ostler

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.

Citation

Cuadrado, R., Oroszlány, L., Szunyogh, L., Hrkac, G., Chantrell, R. W., & Ostler, T. A. (2018). A multiscale model of the effect of Ir thickness on the static and dynamic properties of Fe/Ir/Fe films. Scientific reports, 8(1), Article 3879. https://doi.org/10.1038/s41598-018-21934-5

Journal Article Type	Article
Acceptance Date	Feb 13, 2018
Online Publication Date	Mar 1, 2018
Publication Date	Dec 1, 2018
Deposit Date	Jun 16, 2022
Publicly Available Date	Jun 20, 2022
Journal	Scientific Reports
Print ISSN	2045-2322
Electronic ISSN	2045-2322
Publisher	Nature Publishing Group
Peer Reviewed	Peer Reviewed
Volume	8
Issue	1
Article Number	3879
DOI	https://doi.org/10.1038/s41598-018-21934-5
Keywords	Magnetic properties and materials; Surfaces, interfaces and thin films
Public URL	https://hull-repository.worktribe.com/output/4014973

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