Critical current enhancement in YBa₂Cu₃O₇-delta towards the intrinsic depairing value in short current pulses

Autor(en)

Wolfgang Lang, Ionut Puica, Khurram Siraj, Martin Peruzzi, Johannes D. Pedarnig, Dieter Bäuerle

Abstrakt

The resistive transition from the superconducting to the normal state in very thin films of optimally doped YBa₂Cu₃O_7−δ was measured using sub-μs current pulses and current densities up to 7 MA cm⁻².

Very thin films allow for a good thermal diffusion into the MgO

substrate and minimize the magnetic self field generated by the current.

The depairing current was determined as a function of temperature and

it was found that it agrees well with the predictions from

Ginzburg–Landau theory. It is demonstrated that the depairing current

has a different dependence on a magnetic field than the critical current

determined by a low-voltage criterion. © 2007 Elsevier B.V. All rights reserved.

Organisation(en)

Elektronische Materialeigenschaften

Externe Organisation(en)

Johannes Kepler Universität Linz

Journal

Physica C: Superconductivity and its Applications

Band

460-462 II

Seiten

827-828

Anzahl der Seiten

2

ISSN

0921-4534

DOI

https://doi.org/10.1016/j.physc.2007.04.085

Publikationsdatum

2007

Peer-reviewed

Ja

ÖFOS 2012

103033 Supraleitung, 103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/790bc776-462a-465b-8b90-abbfb69f8e97