Superconductivity at different textures: sintered granulars, thin films of variable thickness and granular structures formed by simple geometric elements juxtaposed

• Grant number: 21/08781-8
• Support Opportunities: Regular Research Grants
• Start date: February 01, 2022
• End date: July 31, 2024
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Wilson Aires Ortiz
• Grantee: Wilson Aires Ortiz
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated researchers: Fabiano Colauto ; Maycon Motta ; Rafael Zadorosny

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 its effects on the triggering and evolution of flux avalanches. In the second subproject, devices formed by the juxtaposition of simple geometric elements will be studied, with different thicknesses and varying values of the ratio between the critical current of the junction (intergranular) and that of the individual parts (intragranular). The other subproject is aimed at studying variations in the synthesis and processing of YBa2Cu3O7-x (YBCO) in the search for favorable conditions to increasing the critical current of nanofibers - eventually transformed into powder - produced by the innovative technique called Solution Blow Spinning. Three different conditions will be studied: (i) introduction of non-superconducting Y2BaCuO5 particles; (ii) addition of nickel (magnetic) and zinc (non-magnetic) - in the YBCO matrix; (iii) variation of nanofiber synthesis using different molar masses of the PVP polymer. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CHAVES, DAVI A. D.; NULENS, LUKAS; DAUSY, HELEEN; RAES, BART; YUE, DONGHUA; ORTIZ, WILSON A.; MOTTA, MAYCON; VAN BAEL, MARGRIET J.; VAN DE VONDEL, JORIS. Nanobridge SQUIDs as Multilevel Memory Elements. PHYSICAL REVIEW APPLIED, v. 19, n. 3, p. 8-pg., 2023-03-28. (21/08781-8)

MARINKOVIC, S.; ABBEY, E. A.; CHAVES, D. A. D.; COLLIENNE, S.; FOURNEAU, E.; JIANG, L.; XUE, C.; ZHOU, Y. H.; ORTIZ, W. A.; MOTTA, M.; et al. Effect of Moderate Electropulsing on Nb Multiterminal Transport Bridges. PHYSICAL REVIEW APPLIED, v. 19, n. 5, p. 10-pg., 2023-05-03. (21/08781-8, 22/03124-1)

PINHEIRO, L. B. L. G.; JIANG, L.; ABBEY, E. A.; CHAVES, DAVI A. D.; CHIQUITO, A. J.; JOHANSEN, T. H.; DE VONDEL, J. VAN; XUE, C.; ZHOU, Y. -H.; V. SILHANEK, A.; et al. Magnetic flux penetration in nanoscale wedge-shaped superconducting thin films. PHYSICAL REVIEW B, v. 106, n. 22, p. 12-pg., 2022-12-27. (21/08781-8)