Vortex matching at 6 T in YBa_2⁢Cu_3⁢O_{7−𝛿} thin films by imprinting a 20-nm periodic pinning array with a focused helium-ion beam

Autor(en)

Max Karrer, Bernd Aichner, Katja Wurster, César Magén, Christoph Schmid, Robin Hutt, Barbora Budinská, Oleksandr Dobrovolskiy, Reinhold Kleiner, Wolfgang Lang, Edward Goldobin, Dieter Koelle

Abstrakt

Controlled engineering of vortex pinning sites in copper-oxide superconductors is a critical issue in manufacturing devices based on magnetic flux quanta. To address this, we employed a focused He-ion beam (He-FIB) to irradiate thin YBa₂Cu₃O_7−δ films and create ultradense hexagonal arrays of defects with lattice spacings as small as 20 nm. Critical current and magnetoresistance measurements demonstrate efficient pinning by amatching field of 6 T visible in a huge temperature range from the critical temperature Tc down to 2 K. These results show that He-FIB irradiation provides excellent opportunities for the development and application of superconducting fluxonic devices based on Abrikosov vortices. In particular, our findings suggest that such devices can operate at temperatures far below Tc, where superconductivity is robust.

Organisation(en)

Elektronische Materialeigenschaften, Nanomagnetismus und Magnonik

Externe Organisation(en)

Eberhard Karls Universität Tübingen, Universidad de Zaragoza, Technische Universität Carolo-Wilhelmina zu Braunschweig

Journal

Physical Review Applied

Band

22

Anzahl der Seiten

11

ISSN

2331-7019

DOI

https://doi.org/10.1103/PhysRevApplied.22.014043

Publikationsdatum

07-2024

Peer-reviewed

Ja

ÖFOS 2012

103013 Ionenphysik, 103033 Supraleitung, 210006 Nanotechnologie

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/d70719c3-ee7d-4a86-b73b-c0b3d2150e18