Unusually strong coherent response from grain-boundary Josephson network in polycrystalline PrxY1 - xBa2Cu3O7 - δ

V. A.G. Rivera, S. Sergeenkov, C. Stari, Jr Cichetto, C. A. Cardoso, E. Marega, F. M. Araujo-Moreira

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Abstract

By applying a highly sensitive homemade AC susceptibility technique to PrxY1 - xBa2Cu3O7 - δ polycrystals (with x = 0.0, 0.1, and 0.3), we observed very sharp Fraunhofer type low-field periodic oscillations of the real part of the AC susceptibility which were attributed to Josephson vortices penetrating intergranular regions of grain-boundary Josephson network in our samples. Assuming the Lorentz type distribution of single-junction contact areas, we were able to successfully fit the experimental data.

Original languageEnglish
Pages (from-to)365-369
Number of pages5
JournalJETP Letters
Volume90
Issue number5
DOIs
StatePublished - Nov 2009

Bibliographical note

Funding Information:
The authors gratefully acknowledge Brazilian agencies CNPq, CAPES and FAPESP for financial support.

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