INFLUENCE OF PULSED LASER ENERGY DEPOSITION ON TRANSPORT-PROPERTIES AND STRUCTURE IN TRILAYER EPITAXIAL (Y/PR)BA2CU3O7-X/SRTIO3 FILMSстатья

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Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.

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[1] Influence of pulsed laser energy deposition on transport-properties and structure in trilayer epitaxial (y/pr)ba2cu3o7-x/srtio3 films / N. G. Chechenin, A. V. Chernysh, V. V. Korneev et al. // Physica status solidi (A): Applied research. — 1993. — Vol. 136, no. 1. — P. 107–111. Modifications of the structural, compositional, and charge transport properties in an epitaxial trilayer YBa2Cu3O7-x/PrBa2Cu3O7/YBa2Cu3O7-x(Y23/Pr23/Y23) thin film on a single crystalline SrTiO3 (STO) substrate as a function of laser pulse fluence are investigated. A transition from the semiconductor-like temperature dependence of the electrical resistance R(t) to that typical for a high-temperature superconducting thin film is observed as a result of pulsed laser irradiation with laser fluences up to almost-equal-to 2.0 J/cm2. The channeling regime in the film is suppressed at fluence less than 0.7 J/cm2. Both observations evidence the transformation of the single crystalline film into a polycrystalline one with some texture. At fluences higher than almost-equal-to 2.0 J/cm2, the metallic properties degrade, though the temperature of the superconducting transition remains constant. Analysis of RBS spectra and R(T) data allows to consider the process of interdiffusion between Y23 and Pr23 layers as incorporation and mixture of corresponding superconducting and insulating grains.

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