Wilson Aires Ortiz

• Abstract

  This research proposal comprises three subprojects. One of them involves the production of superconducting films with different thicknesses, in addition to wedge-shaped samples (variable thickness) aiming to study thickness-dependent changes in the morphology of the penetrated flow. Furthermore, the variation of critical current density with thickness will also be investigated, through it…

  Superconductivity at different textures: sintered granulars, thin films of variable thickness and granular structures formed by simple geometric elements juxtaposed, AP.R
• Tenth International Conference on Vortex Matter in Nanostructured Superconductors, AR.EXT
• 16th International Workshop on Vortex Matter in Superconductors (VORTEX2017), AO.R

(Only some records are available in English at this moment)

• Abstract

  In a recent work we have investigated some structured superconducting systems for which a number of noticeable characteristics have been verified, such as the saturation of the remanent magnetization for fields above the first matching field; layer-by-layer vortex penetration at low temperatures and vortex densities (low excitation fields). Understanding all details of such a behavior is …

  Effects of artificial structures of defects on the magnetic response of superconducting films: first penetrations; thermoremanence; computational simulations and granularity, BP.PD

• Abstract

  This PhD project is focused at the study of the magnetic phase diagram fo single crystals of the system TR1-xPrxBa2Cu3O7-d, TR = Y, Gd, Er. Experimental techniques such as magneto-optical imaging, harmonic susceptibility and micro-Hall sensing will be employed. Good quality single crystals, grown by the flux method, are already available for the initial studies. Additioinal samples will b…

  Interaction of Vortex Matter with structures of uncorrelated defects - Harmonic Susceptibility, Magneto-optical Imaging and Micro-Hall sensing, BP.DR

• Abstract

  Type II superconductors allow penetration of magnetic flux, that could, at first sight, seem harmful to the maintenance of the superconducting state. However, coexistence of superconductivity and magnetism, i.e., the mixed state makes it possible to use superconductors in many applications. There is, however, an inherent problem with this type of superconductors: the vortex motion. Chang…

  Nucleation of Vortex Matter - global and local study using magnetometry, micro-Hall probe and magneto-optical imaging, BP.PD