51 citations · 191 across the 13 of their papers we have counts for
13 papers
Quantifying ground state degeneracy in planar artificial spin ices: the magnetic structure factor approach
F. S. Nascimento, L. B. de Oliveira, D. G. Duarte +3
Magnetic structure factor (MSF) is employed to investigate the ground state degeneracy in rectangular-like artificial spin ices. Our analysis considers the importance of nanoisland…
Direct observation of magnetic monopole freedom in two-dimensional artificial spin ice
D. G. Duarte, L. B. de Oliveira, F. S. Nascimento +4
Magnetic monopole unpairing as a function of external magnetic fields is presented as a fingerprint of this emergent quasiparticles freedom in a two-dimensional artificial spin ice…
Macroscopic Magnetic Monopoles in a 3D-Printed Mechano-Magnet
Hamilton A. Teixeira, Maria F. Bernardo, Michael D. Saccone +3
The notion of magnetic monopoles has puzzled physicists since the introduction of Maxwell's Equations and famously Dirac had hypothesized them in the context of quantum mechanics.…
Bilayer artificial spin ice: magnetic force switching and basic thermodynamics
Fabio S. Nascimento, Afranio R. Pereira, Winder A. Moura-Melo
We study an artificial spin ice system consisting of two identical layers separated by a height offset . For small separation, the layers are shown to attract each other, provid…
Naked-eye visualization of geometric frustration effects in macroscopic spin ices
R. S. Gonçalves, A. C. C. Gomes, R. P. Loreto +4
We study planar rectangular-like arrays composed by macroscopic dipoles (magnetic bars with size around a few centimeters) separated by lattice spacing a and b along each direction…
Superferromagnetism and domain-wall topologies in artificial 'pinwheel' spin ice
Yue Li, Gary W. Paterson, Gavin M. Macauley +9
For over ten years, arrays of interacting single-domain nanomagnets, referred to as artificial spin ices, have been engineered with the aim to study frustration in model spin syste…
Experimental and theoretical evidences for the ice regime in planar artificial spin ices
R. P. Loreto, F. S. Nascimento, R. S. Gonçalves +5
In this work, we explore a kind of geometrical effect in the thermodynamics of artificial spin ices (ASI). In general, such artificial materials are athermal. Here, We demonstrate…
Realization of Rectangular Artificial Spin Ice and Direct Observation of High Energy Topology
I. R. B. Ribeiro, F. S. Nascimento, S. O. Ferreira +7
In this letter, we have constructed and experimentally investigated frustrated arrays of dipoles forming two-dimensional artificial spin ices with different lattice parameters (rec…
Realization of magnetic monopoles current in an artificial spin ice device: A step towards magnetronics
R. P. Loreto, L. A. Morais, R. C. Silva +5
Magnetricity- the magnetic equivalent of electricity- was recently verified experimentally for the first time. Indeed, just as the stream of electric charges produces electric curr…
From confinement to deconfinement of magnetic monopoles in artificial rectangular spin ices
F. S. Nascimento, L. A. S. Mól, W. A. Moura-Melo +1
We study a frustrated two-dimensional array of dipoles forming an artificial rectangular spin ice with horizontal and vertical lattice parameters given by and respectively.…
Addendum to "Anomalous scaling and super-roughness in the growth of CdTe polycrystalline films"
Fábio S. Nascimento, Angélica S. Mata, Silvio C. Ferreira +1
The scaling of the growth of CdTe films on glass substrates was investigated by Mata \textit{et al.} [Phys. Rev. B \textbf{78}, 115305 (2008)]. Part of the analysis consisted of th…
Anomalous scaling and super-roughness in the growth of CdTe polycrystalline films
Angélica S. Mata, Silvio C. Ferreira, Igor R. B. Ribeiro +1
CdTe films grown on glass substrates covered by fluorine doped tin oxide by Hot Wall Epitaxy (HWE) were studied through the interface dynamical scaling theory. Direct measures of t…
Faceted anomalous scaling in the epitaxial growth of semiconductor films
Fábio S. Nascimento, Silvio C. Ferreira, Sukarno O. Ferreira
We apply the generic dynamical scaling theory (GDST) to the surfaces of CdTe polycrystalline films grown in glass substrates. The analysed data were obtained with a stylus profiler…