Search Results - "Leonel, S. A"

The influence of magnetic impurities in the vortex core dynamics in magnetic nano-disks by Silva, J.H., Toscano, D., Sato, F., Coura, P.Z., Costa, B.V., Leonel, S.A.

“…In this work we have used spin dynamics simulations to study the gyrotropic frequency behavior in nano-disks of Permalloy with magnetic impurities. We consider…”
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Effect of the dipolar coupling on the precessional magnetization switching in two-dimensional arrays of single-domain nano-ellipses by Gomes, J. C. S., Toscano, D., Paixão, E. L. M., de Araujo, C. I. L., Sato, F., Dias, R. A., Coura, P. Z., Leonel, S. A.

“…Various spintronic devices use single-domain magnetic nanoparticles as unit cells. Herein, we investigated interparticle dipole-dipole interactions in arrays…”
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Magnetic behavior of a nano-disk constrained in an antiferromagnetic substrate by Rocha, J.C.S., Costa, B.V., Coura, P.Z., Leonel, S.A., Dias, R.A.

“…In this work we report a numerical Monte Carlo study of the behavior of a magnetic nano-disk put over an antiferromagnetic substrate. Three approaches were…”
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Building traps for skyrmions by the incorporation of magnetic defects into nanomagnets: Pinning and scattering traps by magnetic properties engineering by Toscano, D., Leonel, S.A., Coura, P.Z., Sato, F.

“…•Traps for magnetic skyrmions are proposed.•The traps consisting of located modifications of the magnetic properties.•Skyrmions can be found around magnetic…”
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Investigation of domain wall pinning by square anti-notches and its application in three terminals MRAM by de Araujo, C. I. L., Gomes, J. C. S., Toscano, D., Paixão, E. L. M., Coura, P. Z., Sato, F., Massote, D. V. P., Leonel, S. A.

“…In this work, we perform investigations of the competition between domain-wall pinning and attraction by antinotches and finite device borders. The conditions…”
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Suppression of the skyrmion Hall effect in planar nanomagnets by the magnetic properties engineering: Skyrmion transport on nanotracks with magnetic strips by Toscano, D., Mendonça, J.P.A., Miranda, A.L.S., de Araujo, C.I.L., Sato, F., Coura, P.Z., Leonel, S.A.

“…•Nanotracks with magnetic strips are proposed to transport skyrmions.•Attractive and repulsive interactions via magnetic properties engineering.•The skyrmion…”
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Depinning of the transverse domain wall trapped at magnetic impurities patterned in planar nanowires: Control of the wall motion using low-intensity and short-duration current pulses by Paixão, E.L.M., Toscano, D., Gomes, J.C.S., Monteiro, M.G., Sato, F., Leonel, S.A., Coura, P.Z.

“…•Traps for pinning transverse domain walls are proposed.•The traps consisting of located modifications of the magnetic properties.•Domain wall depinning by…”
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Decreasing the size limit for a stable magnetic vortex in modified permalloy nanodiscs by Moreira, C.D., Monteiro, M.G., Toscano, D., Leonel, S.A., Sato, F.

“…•Vortex states in discs are inaccessible in small thickness/diameter ranges.•A proposed change in geometry of discs induce vortex formation at smaller…”
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Dynamics of the vortex core in magnetic nanodisks with a ring of magnetic impurities by Toscano, D., Leonel, S. A., Coura, P. Z., Sato, F., Dias, R. A., Costa, B. V.

“…In this work, we used numerical simulations to study the effect of a ring of magnetic impurities on the vortex core dynamics in nanodisks of Permalloy. The…”
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Study on the coherence degree of magnetization reversal in Permalloy single-domain nano-ellipses by Júnior, D.S. Vieira, Leonel, S.A., Toscano, D., Sato, F., Coura, P.Z., Dias, R.A.

“…Numerical simulations have been performed to study the magnetization reversal in Permalloy nano-ellipses, under combined in-plane magnetic fields along the…”
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Comparative study between a two-dimensional anisotropic Heisenberg antiferromagnet with easy-axis single-ion anisotropy and one with easy-axis exchange anisotropy by Leonel, S.A., Castro Oliveira, Amanda, Costa, B.V., Zimmermann Coura, Pablo

“…Generally, in literature, easy-axis single ion anisotropy and easy-axis exchange anisotropy was treated in indistinct way. In this work we propose to perform a…”
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Topological and dynamical excitations in a classical 2D easy-axis Heisenberg model by KAMPPETER, T, LEONEL, S. A, MERTENS, F. G, GOUVEA, M. E, PIRES, A. S. T, KOVALEV, A. S

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Vortex motion induced by lattice defects in two-dimensional easy-plane magnets by PEREIRA, A. R, LEONEL, S. A, COURA, P. Z, COSTA, B. V

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Building traps for skyrmions by the incorporation of magnetic defects into nanomagnets: pinning and scattering traps by magnetic properties engineering by Toscano, D, Leonel, S. A, Coura, P. Z, Sato, F

“…In this work we have used micromagnetic simulations to report four ways to build traps for magnetic skyrmions. Magnetic defects have been modeled as local…”
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Traps for pinning and scattering of antiferromagnetic skyrmions via magnetic properties engineering by Toscano, D, Santece, I. A, Guedes, R. C. O, Assis, H. S, Miranda, A. L. S, de Araujo, C. I. L, Sato, F, Coura, P. Z, Leonel, S. A

“…Journal of Applied Physics 127, 193902 (2020) Micromagnetic simulations have been performed to investigate the controllability of the skyrmion position in…”
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Suppression of the skyrmion Hall effect in planar nanomagnets by the magnetic properties engineering: Skyrmion transport on nanotracks with magnetic strips by Toscano, D, Mendonça, J. P. A, Miranda, A. L. S, de Araujo, C. I. L, Sato, F, Coura, P. Z, Leonel, S. A

“…Micromagnetic simulations have been performed to investigate the suppression of the skyrmion Hall effect in nanotracks with their magnetic properties…”
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Investigation of domain wall pinning by square anti-notches and its applications in three terminals MRAM by de Araujo, C. I. L, Gomes, J. C. S, Toscano, D, Paixao, E. L. M, Coura, P. Z, Sato, F, Massote, D. V. P, Leonel, S. A

“…In this work we perform investigations of the competition between domain-wall pinning and attraction by anti-notches and finite device borders. The conditions…”
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Magnetization reversal of the transverse domain wall confined between two clusters of magnetic impurities in a ferromagnetic planar nanowire by Toscano, D., Leonel, S.A., Coura, P.Z., Sato, F., Costa, B.V., Vázquez, M.

“…Numerical simulations have been used to investigate the polarity reversal of the transverse domain wall in rectangular magnetic nanowires and the stabilization…”
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Monte Carlo study of the Ni(C 5H 5N) 2Ni(CN) 4-2d compound by Leonel, S.A, Coura, P.Z, Costa, B.V, Pires, A.S.T

“…Assuming that the material Ni(C 5H 5N) 2Ni(CN) 4 has a strong easy-plane anisotropy, we use a two-dimensional biquadratic planar rotator model to describe its…”
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Extinction of the Berezinskii-Kosterlitz-Thouless phase transition by nonmagnetic disorder in planar symmetry spin models by WYSIN, G. M, PEREIRA, A. R, MARQUES, I. A, LEONEL, S. A, COURA, P. Z

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