Strong vortex matching effects in YBCO films with periodic modulations of the superconducting order parameter fabricated by masked ion irradiation

Autor(en)

L. T. Haag, G. Zechner, W. Lang, M. Dosmailov, M. A. Bodea, J. D. Pedarnig

Abstrakt

We report on measurements of the magnetoresistance and of the critical current in thin films of the high-temperature superconductor YBa₂Cu₃O_7-δ (YBCO). A square array of regions with suppressed superconducting order parameter has been created in these films by introducing point defects via irradiation with He⁺ ions through a silicon stencil mask. In such a structure distinct peaks of the critical current can be observed at commensurate arrangements of magnetic flux quanta with the artificial defect lattice. Concurrently, the magnetoresistance shows pronounced minima. Both observations demonstrate that the strong intrinsic pinning in YBCO can be overcome by a periodic array of ion-damage columns with 300 nm spacing.

Organisation(en)

Elektronische Materialeigenschaften

Externe Organisation(en)

Johannes Kepler Universität Linz

Journal

Physica C: Superconductivity and its Applications

Band

503

Seiten

75-81

Anzahl der Seiten

7

ISSN

0921-4534

DOI

https://doi.org/10.1016/j.physc.2014.03.032

Publikationsdatum

08-2014

Peer-reviewed

Ja

ÖFOS 2012

103020 Oberflächenphysik, 103018 Materialphysik, 103009 Festkörperphysik

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Energy Engineering and Power Technology, Electrical and Electronic Engineering

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/68ff0463-38f0-487d-a192-5646def18276