Laser Annealing Of Bulk High-Temperature Superconductors

A.G. Ulyashin,I.G. Gorolchuk,Z.Q. Yang,Y.A. Bumay,V.A. Esepkin,G.A. Tatur,A.V. Alifanov,A.V. Stepanenko

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS（1994）

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Abstract

The results of laser annealing of bulk high-temperature superconductors YBa2Cu3O7-x and Bi2Sr2Ca2Cu3Oy are reported. It is shown that nanosecond pulsed laser treatment of superconductors without further high-temperature processing leads to increasing of critical current density of surface layers of the samples up to 3-4 order within certain interval of laser energy densities due to melting and following crystallization of thin surface layers without degradation of superconducting phase.

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Key words

superconductors,surface layer,high temperature superconductor

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