Unidirectional multipulse helicity-independent all-optical switching in [Ni/Pt] based synthetic ferrimagnets

Sait, Connor R. J.; Dąbrowski, Maciej; Scott, Jade N.; Hendren, William R.; Newman, David G.; N'Diaye, Alpha T.; Klewe, Christoph; Shafer, Padraic; van der Laan, Gerrit; Keatley, Paul S.; Bowman, Robert M.; Hicken, Robert J.

doi:10.1103/PhysRevB.109.134417

Title: Unidirectional multipulse helicity-independent all-optical switching in [Ni/Pt] based synthetic ferrimagnets

Journal Article · 10 April 2024 · Physical Review. B

DOI: https://doi.org/10.1103/PhysRevB.109.134417 · OSTI ID:2336612

;

; Hendren, William R.;

; N'Diaye, Alpha T.; Klewe, Christoph; Shafer, Padraic;

;

; Hicken, Robert J.

Nickel-platinum-based synthetic ferrimagnets (SFi's) are highly tunable and rare-earth-free materials that allow ultrafast all optical control of magnetism to be explored. This study considers a SFi composed of a ferromagnetic [Ni/Pt] multilayer and a ferromagnetic Co layer, separated by an Ir layer that mediates an antiferromagnetic coupling. Helicity-independent all optical switching (HI-AOS) between two antiparallel magnetization states is observed. AOS may be realized at increased temperature through reduction of the thickness of the Pt layers. Switching is unidirectional and has a strong dependence on the applied magnetic field history, which suggests the possible presence of a nanoscale magnetic texture that may be important in controlling AOS in SFi systems. Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 2336612

Alternate ID(s):: OSTI ID: 2407301

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 13 Vol. 109; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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