Proton irradiation effects on metal-YBCO interfaces
| Autor: | M. Barella, Petriina Paturi, Carlos Acha, G. A. Sanca, Hannu Huhtinen, F. Gomez Marlasca, Federico Golmar, M. Alurralde, Pablo Levy |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Superconductivity
Condensed Matter - Materials Science Radiation Materials science Condensed matter physics Proton Monte Carlo method Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Applied Physics (physics.app-ph) Physics - Applied Physics Thermal conduction Fluence Lattice (order) Equivalent circuit Irradiation |
| Popis: | 10 MeV proton-irradiation effects on a YBCO-based test structure were analyzed by measuring its current-voltage (IV) characteristics for different cumulated fluences. For fluences of up to $\sim$80$\cdot$10$^9$~p/cm$^2$ no changes in the electrical behavior of the device were observed, while for a fluence of $\sim$~300$\cdot$10$^9~$ p/cm$^2$ it becomes less conducting. A detailed analysis of the room temperature IV characteristics based on the $\gamma$ power exponent parameter [$\gamma=dLn(I)/dLn(V)$] allowed us to reveal the main conduction mechanisms as well as to establish the equivalent circuit model of the device. The changes produced in the electrical behavior, in accordance with Monte Carlo TRIM simulations, suggest that the main effect induced by protons is the displacement of oxygen atoms within the YBCO lattice, particularly from oxygen-rich to oxygen-poor areas, where they become trapped. Comment: 22 pages, 7 figures, corresponding author: acha@df.uba.ar |
| Databáze: | OpenAIRE |
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