Systematic modification of electrical and superconducting properties of YBCO and nano-patterning of high-<i>T</i>_C superconducting thin films by light-ion irradiation

Autor(en)

Johannes D. Pedarnig, Marius Bodea, Bernd Steiger, Wilhelm Markowitsch, Wolfgang Lang

Abstrakt

Irradiation of high-temperature superconducting (HTS) YBa₂Cu₃O_7-δ (YBCO) thin films with 75 keV He⁺ ions leads to a quasi-exponential increase of the in-plane (ρ_ab) and the out-of-plane (ρ_c) resistivity in the normal state and to a non-linear decrease of the critical temperature T_c with ion dose. In situ electrical measurements at room temperature reveal an irradiation-induced reduction of resistivity anisotropy ρ_c/ρ_ab and a slight relaxation of film resistivity after the ion irradiation is stopped. Ex situ measurements show a stretched-exponential relaxation of T_c and normal state resistivity that continues for several weeks after the ion irradiation. Irradiation of YBCO thin films by low-energy He⁺ ions through stencil masks results in local modification of the electrical and superconducting properties of the HTS material. We demonstrate that masked ion-beam lithography enables to produce structures smaller than 100 nm in size that have potential for applications in future superconducting nano-electronics.

Organisation(en)

Experimentelle Grundausbildung und Hochschuldidaktik, Elektronische Materialeigenschaften

Externe Organisation(en)

Johannes Kepler Universität Linz

Journal

Physics Procedia

Band

36

Seiten

508-513

Anzahl der Seiten

6

DOI

https://doi.org/10.1016/j.phpro.2012.06.075

Publikationsdatum

2012

Peer-reviewed

Ja

ÖFOS 2012

103009 Festkörperphysik, 103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/d38b6943-2b9d-4867-870b-a0efc54e80ff