Original scientific paper

Homogeneous lattice disorder and superconducting properties of YBa2Cu3O6.9 films

Davor Pavuna ; Department of Physics, Swiss Federal Institute of Technology at Lausanne (EPFL), CH - 1015 Lausanne, Switzerland
Andrea Gauzzi ; Department of Physics, Swiss Federal Institute of Technology at Lausanne (EPFL), CH - 1015 Lausanne, Switzerland

Abstract

We discuss the striking changes of the superconducting properties of YBa2Cu3O6.9 films to the homogeneous lattice disorder, induced by varying growth temperatures: Tc decreases with increasing disorder, while the width of the resistive transition and the normal state resistivity increase. We estimate the length scale of such disorder from the broadening ∆ϑ of the <005> X-ray diffraction rocking curves. The
suppression of superconductivity and normal conductivity scales as ∆ϑ and appears for in-plane lattice coherence lengths rc ≈ 1/∆ϑ smaller than about 10 nm.

Keywords

Hrčak ID:

299568

URI

https://hrcak.srce.hr/299568

Publication date:

1.9.1995.

Article data in other languages: croatian

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