A comparative analysis of YBa2Cu3O7 − x grain boundary junctions modified by oxygen annealings and He+ irradiation
作者： M. A Navacerrrada , M. L Lucía , F Sánchez-Quesada
DOI: 10.1209/EPL/I2001-00254-X
关键词:
摘要: In order to bring new data about the physics of microscopic YBa2Cu3O7 − x (YBCO) grain boundary mechanism, we have used two different ways induce modifications in oxygen sublattice Josephson junctions (GBJs): annealings and irradiation with helium at 80 keV both electrodes barrier. We present a comparative study terms main electromagnetic transport parameters between irradiated oxygen-deficient same critical temperature. coupling energy barrier can be enhanced when superconducting properties are not severely degraded. The modification depends on dose particular distribution current inside Changes ratio relative dielectric constant thickness (e/t) upon mainly due changes e, progress direction as normal resistance (RN). On other hand, reduction content by annealing YBCO thin film always causes degradation energy. RN increases along e t.
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