1. Unidirectional multipulse helicity-independent all-optical switching in [Ni/Pt] based synthetic ferrimagnets
- Author
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Sait, Connor RJ, 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, and Hicken, Robert J
- Subjects
Physical Sciences ,Engineering ,Nanotechnology ,Chemical sciences ,Physical sciences - Abstract
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
- 2024