| Grant number: | 16/12390-6 |
| Support Opportunities: | Regular Research Grants |
| Start date: | October 01, 2016 |
| End date: | March 31, 2019 |
| Field of knowledge: | Physical Sciences and Mathematics - Physics - Condensed Matter Physics |
| Principal Investigator: | Rafael Zadorosny |
| Grantee: | Rafael Zadorosny |
| Host Institution: | Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil |
| Associated researchers: | Adenilson José Chiquito ; Edson Sardella ; José José Barba Ortega ; Maycon Motta ; Wilson Aires Ortiz |
| Associated research grant(s): | 17/50382-8 - Superconducting nanowires for high-field applications, AP.R SPRINT |
Abstract
The studies proposed in this manuscript follow two research lines in the superconductivity area with materials at macro and nanoscopic scales. One of them is focused on the experimental area, which is based on the production and characterization of non-conventional superconductors, e.g., the oxide materials. We are proposing the study of BSCCO (B2212) and YBCO materials. The last one with the stoichiometry Y123 and Y358. The samples will be produced by the Solution Blow Spinning technique and the synthesis of the precursor solutions will follow the Sol-Gel process. The samples will be characterized by TGA/DTA, DRX, EDX, SEM, magnetometry and electrical transport. The analysis of the superconducting properties, including the studies of the weak links' superconductivity, will be carry out by electric and magnetic measurements. The other research area is focused on the theoretical study of superconducting materials with mesoscopic dimensions. The motivation of such study lies on the advances in nanofabrication techniques, which intensified experimental studies of superconducting materials at nanoscale. An application of such materials is the single photon detectors. In those devices, a current with intensity near its critical value flows in the material and when a photon riches the superconductor, generates a local hot spot which destroys the superconductivity. Then, a resistive state is created and a peak in the measured potential occurs, counting one photon. On the other hand, with the transport of high intensity currents, a resistive state can appears due to the nucleation of kinematic vortices due to the creation of phase slip lines (not by magnetic fields as in the case of Abrikosov vortices). In this way, one of the areas which barely appears in the literature, is related to the mechanisms of the energy dissipation and the heat diffusion in mesoscopic superconductors. Thus, the theoretical studies will be carried out by simulating those systems using the time-dependent Ginzburg-Landau theory, which will properly adapted to consider energy dissipation and heat diffusion. (AU)
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