Irreversibility Field and Upper Critical Field in YBa2Cu3O7-{\delta} thin film

TL;DR

This study investigates the anisotropic superconducting properties of YBa2Cu3O7-{ extdelta} thin films by measuring critical fields, penetration depths, and coherence lengths, revealing how these properties depend on magnetic field orientation and strength.

Contribution

It provides detailed measurements of irreversibility and upper critical fields, coherence lengths, and penetration depths in YBa2Cu3O7-{ extdelta} thin films, highlighting their directional dependence.

Findings

Critical fields depend on magnetic field direction

Coherence length and penetration depth are calculated at 0 K

Superconducting properties exhibit anisotropy

Abstract

We present a detailed study of the electrical transport properties of YBa2Cu3O7-{\delta} thin film. The irreversibility fields ({\mu}_0 H_irr), upper critical fields ({\mu}_0 H_C2), penetration depths ({\lambda}) and coherence lengths ({\xi} ) of the YBa2Cu3O7-{\delta} materials are deduced from the resistivity curves. Itis observed that {\mu}_0 H_irr, {\mu}_0 H_C2 and {\Delta}Tc of the film strongly depend on the direction and strength of the field. The coherence length {\xi} (0) and penetration depth {\lambda} (0) values at T = 0 K has been calculated from the irreversibility fields ({\mu}_0 H_irr) and upper critical fields ({\mu}_0 H_C2) respectively. Based on all the results, the change of the superconducting properties as a function of the magnetic field direction presents the anisotropy of the sample produced.