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Hysteretic Vortex-Matching Effects in High-Tc Superconductors with Nanoscale Periodic Pinning Landscapes Fabricated by He Ion-Beam Projection

Autor(en)
Georg Zechner, Florian Jausner, Lisa Haag, Wolfgang Lang, M. Dosmailov, M. A. Bodea, Johannes D. Pedarnig
Abstrakt

Square arrays of submicrometer columnar defects in thin YBa2Cu3O7−δ (YBCO) films with spacings down to 300 nm are fabricated by a He ion-beam projection technique. Pronounced peaks in the critical current and corresponding minima in the resistance demonstrate the commensurate arrangement of flux quanta with the artificial pinning landscape, despite the strong intrinsic pinning in epitaxial YBCO films. While these vortex-matching signatures are exactly at the predicted values in field-cooled experiments, they are displaced in zero-field-cooled, magnetic-field-ramped experiments, conserving the equidistance of the matching peaks and minima. These observations reveal an unconventional critical state in a cuprate superconductor with an artificial, periodic pinning array. The long-term stability of such out-of-equilibrium vortex arrangements paves the way for electronic applications employing fluxons.

Organisation(en)
Elektronische Materialeigenschaften
Externe Organisation(en)
Universität Wien, Johannes Kepler Universität Linz
Journal
Physical Review Applied
Band
8
Anzahl der Seiten
9
ISSN
2331-7019
DOI
https://doi.org/10.1103/PhysRevApplied.8.014021
Publikationsdatum
07-2017
Peer-reviewed
Ja
ÖFOS 2012
210003 Nanoelektronik, 103033 Supraleitung
Schlagwörter
ASJC Scopus Sachgebiete
Allgemeine Physik und Astronomie
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/24404b22-ecc4-4ed6-86fd-802126fe6f59