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Steffen Wittrock
Steffen Wittrock
Helmholtz-Zentrum Berlin (HZB) für Materialien und Energie
Adresse e-mail validée de helmholtz-berlin.de
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Année
Deterministic Generation and Guided Motion of Magnetic Skyrmions by Focused He+-Ion Irradiation
LM Kern, B Pfau, V Deinhart, M Schneider, C Klose, K Gerlinger, ...
Nano Letters 22 (10), 4028-4035, 2022
332022
Spin-transfer torque switching at ultra low current densities
JC Leutenantsmeyer, V Zbarsky, M Von Der Ehe, S Wittrock, P Peretzki, ...
Materials Transactions 56 (9), 1323-1326, 2015
182015
Low offset frequency flicker noise in spin-torque vortex oscillators
S Wittrock, S Tsunegi, K Yakushiji, A Fukushima, H Kubota, P Bortolotti, ...
Physical Review B 99 (23), 235135, 2019
122019
Spin–torque dynamics for noise reduction in vortex-based sensors
M Jotta Garcia, J Moulin, S Wittrock, S Tsunegi, K Yakushiji, A Fukushima, ...
Applied Physics Letters 118 (12), 2021
112021
Tailoring optical excitation to control magnetic skyrmion nucleation
LM Kern, B Pfau, M Schneider, K Gerlinger, V Deinhart, S Wittrock, ...
Physical Review B 106 (5), 054435, 2022
92022
Beyond the gyrotropic motion: Dynamic c-state in vortex spin torque oscillators
S Wittrock, P Talatchian, M Romera, S Menshawy, M Jotta Garcia, ...
Applied Physics Letters 118 (1), 2021
92021
THz elastic dynamics in finite-size CoFeB-MgO phononic superlattices
H Ulrichs, D Meyer, M Müller, S Wittrock, M Mansurova, J Walowski, ...
Journal of Applied Physics 120 (14), 2016
92016
Non-hermiticity in spintronics: oscillation death in coupled spintronic nano-oscillators through emerging exceptional points
S Wittrock, S Perna, R Lebrun, K Ho, R Dutra, R Ferreira, P Bortolotti, ...
Nature Communications 15 (1), 971, 2024
72024
Hybrid PLL system for spin torque oscillators utilizing custom ICs in 0.18 μm BiCMOS
M Kreißig, S Wittrock, F Protze, R Lebrun, KJ Merazzo, MC Cyrille, ...
2017 IEEE 60th International Midwest Symposium on Circuits and Systems …, 2017
72017
Spintronic based RF components
U Ebels, J Hem, A Purbawati, AR Calafora, C Murapaka, L Vila, ...
2017 Joint Conference of the European Frequency and Time Forum and IEEE …, 2017
72017
Influence of flicker noise and nonlinearity on the frequency spectrum of spin torque nano-oscillators
S Wittrock, P Talatchian, S Tsunegi, D Crété, K Yakushiji, P Bortolotti, ...
Scientific Reports 10 (1), 13116, 2020
62020
Stabilization of phase noise in spin torque nano oscillators by a phase locked loop
S Wittrock, M Kreißig, B Lacoste, A Litvinenko, P Talatchian, F Protze, ...
arXiv preprint arXiv:2110.13073, 2021
52021
Exceptional points controlling oscillation death in coupled spintronic nano-oscillators
S Wittrock, S Perna, R Lebrun, R Dutra, R Ferreira, P Bortolotti, C Serpico, ...
32022
Flicker and random telegraph noise between gyrotropic and dynamic C-state of a vortex based spin torque nano oscillator
S Wittrock, P Talatchian, M Romera, MJ Garcia, MC Cyrille, R Ferreira, ...
AIP Advances 11 (3), 2021
32021
Coupling-induced bistability in self-oscillating regimes of two coupled identical Spin-Torque Nano-oscillators
S Perna, M Anand, G Oliviero, A Quercia, M d’Aquino, S Wittrock, ...
Physica B: Condensed Matter 674, 415594, 2024
22024
Spin-current manipulation of photo-induced magnetization dynamics in heavy metal/ferromagnet double layer-based nanostructures
S Wittrock, D Meyer, M Müller, H Ulrichs, J Walowski, M Mansurova, ...
IEEE Transactions on Magnetics 53 (11), 1-4, 2017
22017
Stabilization of phase noise in vortex spin torque nano-oscillators by a Phase Locked Loop
M Kreissig, S Wittrock, R Lebrun, S Menshawy, F Protze, ...
2017 IEEE International Magnetics Conference (INTERMAG), 1-1, 2017
12017
Spin-transfer torque switching below 20 kA/cm in perpendicular magnetic tunnel junctions
JC Leutenantsmeyer, M Walter, S Wittrock, P Peretzki, H Schuhmann, ...
arXiv preprint arXiv:1309.3397, 2013
12013
System and method for suppressing low frequency magnetic noise in magneto-resistive sensors
A Solignac, MJ GARCIA, J Moulin, S Wittrock, P Bortolotti, V Cros, ...
US Patent App. 18/247,001, 2023
2023
From noise & stability to synchronization & complex dynamics in spin torque nano-oscillators
S Wittrock
Université Paris-Saclay, 2020
2020
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