37 citations · 108 across the 6 of their papers we have counts for
6 papers
Magnetic vortices as localized mesoscopic domain wall pinning sites
R. L. Novak, L. C. Sampaio
We report on the controllable pinning of domain walls in stripes with perpendicular magnetic anisotropy by magnetostatic coupling to magnetic vortices in disks located above the st…
Magnetic vortex chirality switching in Permalloy nanowires with asymmetric notches
J. Brandão, R. L. Novak, H. Lozano +4
We have investigated the motion of vortex domain walls passing across non symmetric triangular notches in single Permalloy nanowires. We have measured hysteresis cycles using the f…
Vortex core magnetization dynamics induced by thermal excitation
Tiago S. Machado, Tatiana G. Rappoport, Luiz C. Sampaio
We investigate the effect of temperature on the dynamic properties of magnetic vortices in small disks. Our calculations use a stochastic version of the Landau-Lifshitz-Gilbert (LL…
Magnetoresistance in nanostructures: the role of nonuniform current
Tiago S. Machado, M. Argollo de Menezes, Tatiana G. Rappoport +1
We developed a method to calculate the magnetoresistance of magnetic nanostructures. We discretize a magnetic disk in small cells and numerically solve the Landau-Lifshitz-Gilbert…
Static and dynamic properties of vortices in anisotropic magnetic disks
Tiago S. Machado, Tatiana G. Rappoport, Luiz C. Sampaio
We investigate the effect of the magnetic anisotropy () on the static and dynamic properties of magnetic vortices in small disks. Our micromagnetic calculations reveal that fo…
Probing the interface magnetism in the FeMn/NiFe exchange bias system using magnetic second harmonic generation
L. Sampaio, A. Mougin, J. Ferre +7
Second harmonic generation magneto-optic Kerr effect (SHMOKE) experiments, sensitive to buried interfaces, were performed on a polycrystalline NiFe/FeMn bilayer in which areas with…