0000000001158092

AUTHOR

Roberto Lo Conte

showing 3 related works from this author

Effective field analysis using the full angular spin-orbit torque magnetometry dependence

2017

Spin-orbit torques promise ultra-efficient magnetization switching used for advanced devices based on emergent quasi-particles such as domain walls and skyrmions. Recently, the spin structure dynamics, materials and systems with tailored spin-orbit torques are being developed. A method, which allows one to detect the acting torques in a given system as a function of the magnetization direction is the torque-magnetometry method based on a higher harmonics analysis of the anomalous Hall-effect. Here we show that the effective fields acting on magnetic domain walls that govern the efficiency of their dynamics require a sophisticated analysis taking into account the full angular dependence of t…

PhysicsCondensed matter physicsMagnetic domainCondensed Matter - Mesoscale and Nanoscale PhysicsMagnetometerDynamics (mechanics)FOS: Physical sciences02 engineering and technology021001 nanoscience & nanotechnology01 natural scienceslaw.inventionMagnetizationlawHarmonics0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)QuasiparticleTorqueAstrophysics::Earth and Planetary Astrophysics[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]010306 general physics0210 nano-technologyComputingMilieux_MISCELLANEOUSSpin-½Physical Review B
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Control of the Magnetic Configuration of Ferromagnetic Nanostructures Across the Structural Phase Transition of Vanadium Dioxide

2016

We investigate the effect of the structural phase transition in VO 2 in magnetoelastically coupled heterostructures of VO 2 and Ni. Continuous and nano-patterned Ni layers were used, and we found reversible and reproducible magnetic domain switching induced by the VO 2 structural phase transition. The magnetic states of the nano-patterned ferromagnetic elements were dominated by topographic features which generated strong pinning but still allowed for a reversible switching between the states. Our measurements constitute a key step for the use of the VO 2 phase transition for ultrafast dynamical studies of the inverse mangetostrictive effect, and eventually employing the effect for ultrafas…

Phase transitionMaterials scienceNanostructureCondensed matter physicsMagnetic domainHeterojunction02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesElectronic Optical and Magnetic MaterialsMagnetic shape-memory alloyFerromagnetism0103 physical sciences010306 general physics0210 nano-technologySaturation (magnetic)Ultrashort pulseIEEE Magnetics Letters
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Ferromagnetic layer thickness dependence of the Dzyaloshinskii-Moriya interaction and spin-orbit torques in Pt\Co\AlOx

2016

We report the thickness dependence of Dzyaloshinskii-Moriya interaction (DMI) and spin-orbit torques (SOTs) in Pt\Co(t)\AlOx, studied by current-induced domain wall (DW) motion and second-harmonic experiments. From the DW motion study, a monotonous decay of the effective DMI strength with an increasing Co thickness is observed, in agreement with a DMI originating at the Pt\Co interface. The study of the ferromagnetic thickness dependence of spin-orbit torques reveals a more complex behavior. The effective SOT-field driving the DW motion is found to initially increase and then saturate with an increasing ferromagnetic thickness, while the effective SOT-fields acting on a saturated magnetic s…

Condensed Matter - Mesoscale and Nanoscale PhysicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)FOS: Physical sciencesCondensed Matter::Strongly Correlated Electrons
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