Buscar
Mostrando ítems 1-10 de 179
Detection of defect-induced magnetism in low-dimensional ZnO structures by Magnetophotocurrent
(Wiley, 2015-06)
The detection of defect-induced magnetic order in single low-dimensional oxide structures is in general difficult because of the relatively small yield of magnetically ordered regions. In this work we have studied the ...
Structural and magnetic changes induced by electron and ion irradiation on HOPG
(2015)
In recent decades, many studies reported magnetism in carbon-based materials. This phenomenon was attributed to structural defects within the sample. Many authors showed an increase of magnetization in HOPG (Highly Oriented ...
Defect induced room temperature ferromagnetism in high quality Co-doped ZnO bulk samples
(2021-04-05)
The nature of the often reported room temperature ferromagnetism in transition metal doped oxides is still a matter of huge debate. Herein we report on room temperature ferromagnetism in high quality Co-doped ZnO (Zn1−xCoxO) ...
Primordial magnetic helicity from stochastic electric currents
(American Physical Society, 2014-04)
We study the possibility that primordial magnetic fields generated in the transition between inflation and reheating posses magnetic helicity, HM. The fields are induced by stochastic currents of scalar charged particles ...
Self-assembled vortex crystals induced by inhomogeneous magnetic textures
(2019-01-01)
We investigate the self-assembly of vortices in a type-II superconducting disk subjected to highly nonuniform confining potentials produced by inhomogeneous magnetic textures. Using a series of numerical experiments performed ...
Structural and magnetic changes induced by electron and ion irradiation on HOPG
(Elsevier, 2015-04)
In recent decades, many studies reported magnetism in carbon-based materials. This phenomenon was attributed to structural defects within the sample. Many authors showed an increase of magnetization in HOPG (Highly Oriented ...
Theoretical study about alkali metal adsorption on pristine and defective (8,0) SWCNT: Geometrical, magnetic and electronic changes
(Elsevier Science, 2020-05-30)
In this work we performed density functional theory (DFT) calculations, analyzing the effects of adsorption of several alkali metals (AM) on pristine and defective (8,0) single-wall carbon nanotube (SWCNT). We found that ...
Magnetic field-induced vortex triplet and vortex lattice in a liquid crystal cell
(Amer Physical Soc, 2020)
Vortices are particle-type solutions with topological charges that can steer the dynamics in various physical systems. By the application of electromagnetic fields onto a homeotropic nematic liquid crystal cell, we are ...
Oxygen-vacancy-induced local ferromagnetism as a driving mechanism in enhancing the magnetic response of ferrites
(American Physical Society, 2014-03)
This work probes the relevance of oxygen vacancies in the formation of local ferromagnetic coupling between Fe ions at octahedral sites in zinc ferrites. This coupling gives rise to a ferrimagnetic ordering with the Curie ...