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