Search results for "spin-transfer-torque"

showing 2 items of 2 documents

Magnetic skyrmions: from fundamental to applications

2016

In this topical review, we will discuss recent advances in the field of skyrmionics (fundamental and applied aspects) mainly focusing on skyrmions that can be realized in thin film structures where an ultrathin ferromagnetic layer (<1 nm) is coupled to materials with large spin-orbit coupling. We review the basic topological nature of the skyrmion spin structure that can entail a stabilization due to the chiral exchange interaction present in many multilayer systems with structural inversion asymmetry. The static spin structures and the dynamics of the skyrmions are also discussed. In particular, we show that skyrmions can be displaced with high reliability and efficiency as needed for t…

PhysicsAcoustics and UltrasonicsCondensed matter physicsSkyrmion02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter PhysicsCondensed Matter::Mesoscopic Systems and Quantum Hall Effect01 natural scienceslogic gates; microwave oscillator; racetrack memory; skyrmion; spin-Hall effect; spin-torque diode effect; spin-transfer-torque; Electronic Optical and Magnetic Materials; Condensed Matter Physics; Acoustics and Ultrasonics; Surfaces Coatings and FilmsSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsSkyrmionQuantum mechanics0103 physical scienceslogic gatesspin-transfer-torqueddc:530spin-torque diode effect010306 general physics0210 nano-technologySkyrmion; spin-transfer-torque; spin-Hall effect; racetrack memory; microwave oscillator; spin-torque diode effect; logic gatesspin-Hall effectracetrack memorymicrowave oscillatorJournal of Physics D: Applied Physics
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Imaging Spin Dynamics on the Nanoscale Using X-Ray Microscopy

2015

The dynamics of emergent magnetic quasiparticles, such as vortices, domain walls and bubbles are studied by scanning transmission X-ray microscopy (STXM), combining magnetic (XMCD) contrast with about 25 nm lateral resolution as well as 70 ps time resolution. Essential progress in the understanding of magnetic vortex dynamics is achieved by vortex core reversal observed by sub-GHz excitation of the vortex gyromode, either by ac magnetic fields or spin transfer torque. The basic switching scheme for this vortex core reversal is the generation of a vortex-antivortex pair. Much faster vortex core reversal is obtained by exciting azimuthal spin wave modes with (multi-GHz) rotating magnetic fiel…

coupled modesdomain wallsPhysicsCondensed Matter::Superconductivityvortex core reversalspin-transfer-torqueX-ray microscopyddc:530vortex dynamicsspin wavesnano wires
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