title: Thickness-modulated tungsten-carbon superconducting nanostructures grown by focused ion beam induced deposition for vortex pinning up to high magnetic fields.
abstract: We report efficient vortex pinning in thickness-modulated tungsten-carbon-based (W-C) nanostructures grown by focused ion beam induced deposition (FIBID). By using FIBID, W-C superconducting films have been created with thickness modulation properties exhibiting periodicity from 60 to 140 nm, leading to a strong pinning potential for the vortex lattice. This produces local minima in the resistivity up to high magnetic fields (2.2 T) in a broad temperature range due to commensurability effects between the pinning potential and the vortex lattice. The results show that the combination of single-step FIBID fabrication of superconducting nanostructures with built-in artificial pinning landscapes and the small intrinsic random pinning potential of this material produces strong periodic pinning potentials, maximizing the opportunities for the investigation of fundamental aspects in vortex science under changing external stimuli (e.g., temperature, magnetic field, electrical current).
authors.affiliation: Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain; Departamento de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain.
authors.forename: Ismael García
authors.initials: IG
authors.lastname: Serrano
authors.affiliation: Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain; Departamento de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain.
authors.forename: Javier
authors.initials: J
authors.lastname: Sesé
authors.affiliation: Laboratorio de Bajas Temperaturas, Unidad Asociada UAM/CSIC, Instituto Nicolás Cabrera, Condensed Matter Physics Center (IFIMAC), Departa-mento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Spain.
authors.forename: Isabel
authors.initials: I
authors.lastname: Guillamón
authors.affiliation: Laboratorio de Bajas Temperaturas, Unidad Asociada UAM/CSIC, Instituto Nicolás Cabrera, Condensed Matter Physics Center (IFIMAC), Departa-mento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Spain.
authors.forename: Hermann
authors.initials: H
authors.lastname: Suderow
authors.affiliation: Laboratorio de Bajas Temperaturas, Unidad Asociada UAM/CSIC, Instituto Nicolás Cabrera, Condensed Matter Physics Center (IFIMAC), Departa-mento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Spain.
authors.forename: Sebastián
authors.initials: S
authors.lastname: Vieira
authors.affiliation: Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain; Departamento de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain.
authors.forename: Manuel Ricardo
authors.initials: MR
authors.lastname: Ibarra
authors.affiliation: Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain; Departamento de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain; Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC - Universidad de Zaragoza, 50009 Zaragoza, Spain.
authors.forename: José María
authors.initials: JM
authors.lastname: De Teresa
keywords: focused ion beam induced deposition; magnetotransport; superconductivity; vortex lattice