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Instant-On Spin Torque in Noncollinear Magnetic Tunnel Junctions

2018; American Physical Society; Volume: 10; Issue: 5 Linguagem: Inglês

10.1103/physrevapplied.10.054028

2331-7043

Olivier Bultynck, Mauricio Manfrini, Adrien Vaysset, Johan Swerts, Christopher J. Wilson, Bart Sorée, Marc Heyns, D. Mocuta, Iuliana Radu, T. Devolder,

Quantum and electron transport phenomena

Spin-torque-operated magnetic tunnel junctions (MTJs) with perpendicular magnetic anisotropy are established charge-to-spin transducers. Their switching speed is still fundamentally limited by thermal activation, however, leading to slower switching in memory applications. In this study a canted magnetization state is engineered to overcome the incubation delay, for faster switching times. Comparison to perpendicular MTJs is performed, with direct time-resolved observation of switching dynamics in both systems. These results should facilitate optimization of MTJ speed for spintronic computing.