Visible to the public Coherent Control of Acoustic-Wave-Induced Magnetization Dynamics in Magnetic Tunnel Junctions

TitleCoherent Control of Acoustic-Wave-Induced Magnetization Dynamics in Magnetic Tunnel Junctions
Publication TypeConference Paper
Year of Publication2018
AuthorsYang, H. F., Hu, X. K., Sievers, S., Bohnert, T., Costa, J. D., Tarcquzzaman, M., Ferreira, R., Bieler, M., Schumacher, H. W.
Conference Name2018 Conference on Precision Electromagnetic Measurements (CPEM 2018)
Keywordsacoustic coupling, Acoustic measurements, acoustic pulses, acoustic-wave-induced magnetization dynamics, coherent control, excitation positions, femtosecond laser excitation, High-speed optical techniques, Human Behavior, induced magnetization precession, laser beam effects, Laser excitation, laser excitation position, magnetic field, Magnetic field measurement, magnetic tunnel junction, magnetic tunnel junctions, Magnetic tunneling, magnetic tunnelling, magnetisation, Magnetization, magnetization dynamics, Magnetoacoustic effects, magnetoelastic coupling, magnetoelastic effects, Measurement by laser beam, phonon, pubcrawl, Resiliency, Scalability, surface acoustic wave, Surface acoustic waves, time-domain analysis, time-domain measurements
AbstractWe report time-domain measurements of acoustic-wave-induced magnetization dynamics in magnetic tunnel junctions. The acoustic pulses are generated by femtosecond laser excitation and interact with the magnetization through magnetoelastic coupling. The induced magnetization precession is not only dependent on the externally applied magnetic field, but also on the laser excitation position. The presented method even allows us to coherently control the precession using two laser pulses at various magnetic fields and excitation positions.
Citation Keyyang_coherent_2018