ICIFI   29099
INSTITUTO DE CIENCIAS FISICAS
Unidad Ejecutora - UE
artículos
Título:
Proton irradiation effects on metal-YBCO interfaces
Autor/es:
ACHA, C.; ALURRALDE, M.; PATURI, P.; BARELLA, M.; HUHTINEN, H.; LEVY, P.; SANCA, G.A.; MARLASCA, F. GOMEZ; GOLMAR, F.
Revista:
RADIATION PHYSICS AND CHEMISTRY (OXFORD)
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2021 vol. 183
ISSN:
0969-806X
Resumen:
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 ~ 80⋅109 p/cm2 no changes in the electrical behavior of the device were observed, while for a fluence of ~ 300⋅109 p/cm2 it becomes less conducting. A detailed analysis of the room temperature IV characteristics based on the γ power exponent parameter [γ = 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.