Search results for "Domain wall motion"

showing 3 items of 3 documents

Geometrical control of pure spin current induced domain wall depinning.

2017

[EN] We investigate the pure spin-current assisted depinning of magnetic domain walls in half ring based Py/Al lateral spin valve structures. Our optimized geometry incorporating a patterned notch in the detector electrode, directly below the Al spin conduit, provides a tailored pinning potential for a transverse domain wall and allows for a precise control over the magnetization configuration and as a result the domain wall pinning. Due to the patterned notch, we are able to study the depinning field as a function of the applied external field for certain applied current densities and observe a clear asymmetry for the two opposite field directions. Micromagnetic simulations show that this …

Pure spin currentField (physics)Magnetic domainGeometrical constrictions in nanostructuresSpin valve02 engineering and technology01 natural sciencesMagnetization0103 physical sciencesComputational physicsGeneral Materials Science[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]010306 general physicsComputingMilieux_MISCELLANEOUSSpin-½PhysicsCondensed matter physicsMagnetismSpin-transfer torque021001 nanoscience & nanotechnologyCondensed Matter PhysicsDomain wall motionDomain wall (magnetism)Spin Hall effect0210 nano-technologyJournal of physics. Condensed matter : an Institute of Physics journal
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Current-induced domain wall motion in nanoscale ferromagnetic elements

2011

The manipulation of a magnetic domain wall (DW) by a spin polarized current in ferromagnetic nanowires has attracted tremendous interest during the last years due to fundamental questions in the fields of spin dependent transport phenomena and magnetization dynamics but also due to promising applications, such as DW based magnetic memory concepts and logic devices. We comprehensively review recent developments in the field of geometrically confined domain walls and in particular current induced DW dynamics. We focus on the influence of the magnetic and electronic transport properties of the materials on the spin transfer effect in DWs. After considering the different DW structures in ferrom…

Ring StructuresAcoustics and Ultrasonics02 engineering and technology01 natural sciencesThreshold Current010305 fluids & plasmasGeneral Materials SciencePermalloy NanowiresAnisotropyComputer Science::DatabasesSpin-½electrical [Condensed matter]PhysicsSpin polarizationCondensed matter physicsGiant Magnetoresistance021001 nanoscience & nanotechnologyCondensed Matter PhysicsSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsDynamicsDomain wall (magnetism)magnetic and optical SurfacesMechanics of MaterialsCharge carrierThin0210 nano-technologyCurrent PulsesAngular momentumCurrent-induced domain wall motionMagnetic domain530 PhysicsNanowirePerpendicular Magnetic-AnisotropyGiant magnetoresistanceMagnetizationMemory0103 physical sciencesddc:530010306 general physicsMagnetization dynamicsNanowiresX-RaysMechanical EngineeringPhase-DiagramSpin engineering530 PhysikDomain Wallinterfaces and thin filmsFerromagnetismTorqueShift RegisterIon IrradiationNanoscale science and low-D systemsSpin-Polarized CurrentSpin Torque
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Magnetic domain-wall racetrack memory for high density and fast data storage

2012

The racetrack memory device is a new concept of Magnetic RAM (MRAM) based on controlling domain wall (DW) motion in ferromagnetic nanowires. It promises ultra-high storage density thanks to the possibility to store multiple narrow DWS per memory cell. By using read and write heads based on magnetic tunnel junctions (MTJ) with perpendicular magnetic anisotropy (PMA) fast data access speed can also be achieved. Thereby the racetrack memory can be used as universal storage to address both embedded and standalone applications. In this paper, we present the device physics, integration circuit and architecture designs of a racetrack memory based on MTJs with PMA. Mixed SPICE simulations at 65 nm …

Standalone applicationsMagnetic domainComputer scienceSpiceArchitecture designsMRAM devicesMemory cellElectronic engineeringRacetrack memoryPerpendicular magnetic anisotropyMagnetic domainsMagnetoresistive random-access memoryHardware_MEMORYSTRUCTURESIntegration circuitsNanowiresbusiness.industryMagnetic devicesElectrical engineeringNon-volatile memory technologyDomain wall motionTunnel magnetoresistanceData storage equipmentComputer data storageFerromagnetic nanowireNode (circuits)Magnetic tunnel junctionbusinessRandom access storage
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