Spatially Resolved Characterization of the Local Superconducting Properties of Compositional Gradient REBCO Films
We have succeeded in developing a high-resolution and high-throughput measurement method for local sheet current density (J<inf>s</inf>) and critical temperature (T<inf>c</inf>) in a thin film sample prepared by Transient Liquid-Assisted Growth using Chemical Solution Deposit...
| Autores: | , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/395893 |
| Acceso en línea: | http://hdl.handle.net/10261/395893 https://api.elsevier.com/content/abstract/scopus_id/105003035805 |
| Access Level: | acceso abierto |
| Palabra clave: | REBCO film Scanning hall-probe microscopy Superconducting property distribution TLAG-CSD |
| Sumario: | We have succeeded in developing a high-resolution and high-throughput measurement method for local sheet current density (J<inf>s</inf>) and critical temperature (T<inf>c</inf>) in a thin film sample prepared by Transient Liquid-Assisted Growth using Chemical Solution Deposition (TLAG-CSD), based on magnetic microscopy. Drop-on-demand inkjet printing (IJP) has been adopted to design and fabricate a combinatorial sample with a one-dimensional compositional gradient of Rare Earth (RE) elements within the REBa<inf>2</inf>Cu<inf>3</inf>O<inf>7-</inf><inf>δ</inf> (REBCO, RE = Y<inf>ϵ</inf>Gd<inf>1-</inf><inf>ϵ</inf>) crystal. The quality of the epitaxial REBCO film has been assessed in several sample locations by means of EDX, XRD and SEM characterization techniques to unravel the Rare Earth influence on the growth. However, the relationship with superconducting properties is not yet fully understood. In this study, we have developed a high-resolution and high-throughput measurement method for local J<inf>s</inf> at low temperature and in-field conditions, as well as T<inf>c</inf> in a film sample by low-temperature in-field scanning Hall probe microscopy. Corresponding J<inf>s</inf> distributions are obtained at 5 K and up to 4.5 T, which J<inf>s</inf> is greatly influenced by the composition because the Gd rich compositions exhibit polycrystallinity and ab-oriented grain. The optimum compositions for the highest J<inf>s</inf> are close to the 50% of Y and Gd composition at 4.5 T and at self-field. Furthermore, the temperature dependence of J<inf>s</inf> distribution is studied up to 88.0 K at self-field and the spatial T<inf>c</inf> distribution is derived to study the relationship between T<inf>c</inf> and compositions. T<inf>c</inf> dependence with the Rare Earth composition is similarly to that of J<inf>s</inf> |
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