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Surface Superconductivity Changes of Niobium Sheets by Femtosecond Laser-Induced Periodic Nanostructures
Irradiation with ultra-short (femtosecond) laser beams enables the generation of sub-wavelength laser-induced periodic surface structures (LIPSS) over large areas with controlled spatial periodicity, orientation, and depths affecting only a material layer on the sub-micrometer scale. This study repo...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7765670/ https://www.ncbi.nlm.nih.gov/pubmed/33339202 http://dx.doi.org/10.3390/nano10122525 |
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author | Cubero, Álvaro Martínez, Elena Angurel, Luis A. de la Fuente, Germán F. Navarro, Rafael Legall, Herbert Krüger, Jörg Bonse, Jörn |
author_facet | Cubero, Álvaro Martínez, Elena Angurel, Luis A. de la Fuente, Germán F. Navarro, Rafael Legall, Herbert Krüger, Jörg Bonse, Jörn |
author_sort | Cubero, Álvaro |
collection | PubMed |
description | Irradiation with ultra-short (femtosecond) laser beams enables the generation of sub-wavelength laser-induced periodic surface structures (LIPSS) over large areas with controlled spatial periodicity, orientation, and depths affecting only a material layer on the sub-micrometer scale. This study reports on how fs-laser irradiation of commercially available Nb foil samples affects their superconducting behavior. DC magnetization and AC susceptibility measurements at cryogenic temperatures and with magnetic fields of different amplitude and orientation are thus analyzed and reported. This study pays special attention to the surface superconducting layer that persists above the upper critical magnetic field strength H(c2), and disappears at a higher nucleation field strength H(c3). Characteristic changes were distinguished between the surface properties of the laser-irradiated samples, as compared to the corresponding reference samples (non-irradiated). Clear correlations have been observed between the surface nanostructures and the nucleation field H(c3), which depends on the relative orientation of the magnetic field and the surface patterns developed by the laser irradiation. |
format | Online Article Text |
id | pubmed-7765670 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-77656702020-12-27 Surface Superconductivity Changes of Niobium Sheets by Femtosecond Laser-Induced Periodic Nanostructures Cubero, Álvaro Martínez, Elena Angurel, Luis A. de la Fuente, Germán F. Navarro, Rafael Legall, Herbert Krüger, Jörg Bonse, Jörn Nanomaterials (Basel) Article Irradiation with ultra-short (femtosecond) laser beams enables the generation of sub-wavelength laser-induced periodic surface structures (LIPSS) over large areas with controlled spatial periodicity, orientation, and depths affecting only a material layer on the sub-micrometer scale. This study reports on how fs-laser irradiation of commercially available Nb foil samples affects their superconducting behavior. DC magnetization and AC susceptibility measurements at cryogenic temperatures and with magnetic fields of different amplitude and orientation are thus analyzed and reported. This study pays special attention to the surface superconducting layer that persists above the upper critical magnetic field strength H(c2), and disappears at a higher nucleation field strength H(c3). Characteristic changes were distinguished between the surface properties of the laser-irradiated samples, as compared to the corresponding reference samples (non-irradiated). Clear correlations have been observed between the surface nanostructures and the nucleation field H(c3), which depends on the relative orientation of the magnetic field and the surface patterns developed by the laser irradiation. MDPI 2020-12-16 /pmc/articles/PMC7765670/ /pubmed/33339202 http://dx.doi.org/10.3390/nano10122525 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Cubero, Álvaro Martínez, Elena Angurel, Luis A. de la Fuente, Germán F. Navarro, Rafael Legall, Herbert Krüger, Jörg Bonse, Jörn Surface Superconductivity Changes of Niobium Sheets by Femtosecond Laser-Induced Periodic Nanostructures |
title | Surface Superconductivity Changes of Niobium Sheets by Femtosecond Laser-Induced Periodic Nanostructures |
title_full | Surface Superconductivity Changes of Niobium Sheets by Femtosecond Laser-Induced Periodic Nanostructures |
title_fullStr | Surface Superconductivity Changes of Niobium Sheets by Femtosecond Laser-Induced Periodic Nanostructures |
title_full_unstemmed | Surface Superconductivity Changes of Niobium Sheets by Femtosecond Laser-Induced Periodic Nanostructures |
title_short | Surface Superconductivity Changes of Niobium Sheets by Femtosecond Laser-Induced Periodic Nanostructures |
title_sort | surface superconductivity changes of niobium sheets by femtosecond laser-induced periodic nanostructures |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7765670/ https://www.ncbi.nlm.nih.gov/pubmed/33339202 http://dx.doi.org/10.3390/nano10122525 |
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