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Symmetry effects on the static and dynamic properties of coupled magnetic oscillators

Accepted version
Peer-reviewed

Type

Article

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Authors

Patchett, JP 
Drouhin, M 
Liao, JW 
Soban, Z 
Petit, D 

Abstract

The effect of symmetry on the resonance spectra of antiferromagnetically coupled oscillators has attracted new interest with the discovery of symmetry-breaking induced anti-crossings. Here, we experimentally characterise the resonance spectrum of a synthetic antiferromagnet Pt/CoFeB/Ru/CoFeB/Pt, where we are able to independently tune the effective magnetisation of the two coupled magnets. To model our results we apply the mathematical methods of group theory to the solutions of the Landau Lifshitz Gilbert equation. This general approach, usually applied to quantum mechanical systems, allows us to identify the main features of the resonance spectrum in terms of symmetry breaking and to make a direct comparison with crystal antiferromagnets.

Description

Keywords

cond-mat.mes-hall, cond-mat.mes-hall

Journal Title

Physical Review B

Conference Name

Journal ISSN

2469-9950
2469-9969

Volume Title

Publisher

American Physical Society (APS)
Sponsorship
EPSRC (2125947)
European Research Council (610115)