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20102020
most citedVortex-antivortex pairs induced by curvature in toroidal nanomagnets

52 citations

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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

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11 papers · 1 filter

cond-mat.mes-hall2017★ 41 cited

Oscillatory behavior of the domain wall dynamics in a curved cylindrical magnetic nanowire

R. Moreno, V. L. Carvalho-Santos, A. P. Espejo +3

Understanding the domain wall dynamics is an important issue in modern magnetism. Here we present results of domain wall displacement in curved cylindrical nanowires at a constant…

cond-mat.mes-hall2016★ 52 cited

Vortex-antivortex pairs induced by curvature in toroidal nanomagnets

Smiljan Vojkovic, Vagson L. Carvalho-Santos, Jakson M. Fonseca +1

We show that the curvature of nanomagnets can be used to induce chiral textures in the magnetization field. Among the phenomena related to the interplay between geometry and magnet…

cond-mat.mes-hall2016★ 29 cited

Magnetization ground state and reversal modes of magnetic nanotori

Smiljan Vojkovic, Álvaro S. Núñez, Dora Altbir +1

In this work, and by means of micromagnetic simulations, we study the magnetic properties of toroidal nanomagnets. The magnetization ground state for different values of the aspect…

cond-mat.mes-hall2015

Spin wave vortex from the scattering on Bloch point solitons

Vagson L. Carvalho-Santos, Ricardo Gabriel Elías, Alvaro S. Núñez

The interaction of a spin wave with a stationary Bloch point is studied. The topological non-trivial structure of the Bloch point manifests in the propagation of spin waves endowin…

cond-mat.mes-hall2014★ 16 cited

Spin waves scattering on a Bloch point

R. G. Elías, V. L. Carvalho-Santos, A. S. Núñez +1

We show that, after a transformation, the dynamics of linear perturbations (spin waves) around a singular Bloch point soliton is formally equivalent to a quantum system of an elect…

cond-mat.mes-hall2014★ 17 cited

Curvature-induced changes in the magnetic energy of vortices and skyrmions in paraboloidal nanoparticles

V. L. Carvalho-Santos, R. G. Elias, J. M. Fonseca +1

Curvature effects are important for a proper description of the properties of magnetic systems. In this paper the exchange and dipolar energy of vortices on a paraboloidal shell is…

cond-mat.mes-hall2014★ 22 cited

Topological magnetic solitons on a paraboloidal shell

P. S. C. Vilas-Boas, R. G. Elias, D. Altbir +2

We study the influence of curvature on the exchange energy of skyrmions and vortices on a paraboloidal surface. It is shown that such structures appear as excitations of the Heisen…

cond-mat.mes-hall2014★ 27 cited

Stability of skyrmions on curved surfaces in the presence of a magnetic field

V. L. Carvalho-Santos, R. G. Elias, D. Altbir +1

We study the stability and energetics associated to skyrmions appear- ing as excitations on curved surfaces. Using a continuum model we show that the presence of cylindrically radi…

cond-mat.mes-hall2013★ 6 cited

Topological spin excitations induced by an external magnetic field coupled to a surface with rotational symmetry

V. L. Carvalho-Santos, R. Dandoloff

We study the Heisenberg model in an external magnetic field on curved surfaces with rotational symmetry. The Euler-Lagrange static equations, derived from the Hamiltonian lead to t…

cond-mat.mes-hall2012★ 23 cited

On geometry-dependent vortex stability and topological spin excitations on curved surfaces with cylindrical symmetry

Vagson L. Carvalho-Santos, Felipe A. Apolonio, Nemésio M. Oliveira-Neto

We study the Heisenberg Model on cylindrically symmetric curved surfaces. Two kinds of excitations are considered. The first is given by the isotropic regime, yielding the sine-Gor…

cond-mat.mes-hall2010★ 33 cited

Ground-state configurations in ferromagnetic nanotori

Vagson L. Carvalho-Santos, Winder A. Moura-Melo, Afranio R. Pereira

Magnetization ground states are studied in toroidal nanomagnets. The energetics associated to the ferromagnetic, vortex and onion-like configurations are explicitly computed. The a…