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Synthesis of thin superconducting HgBa2CaCu2O6+δ films by post-annealing of laser-ablated precursors

Published online by Cambridge University Press:  31 January 2011

A. Brazdeikis ,
A. S. FlodstrÖm  and
I. Bryntse
A. Brazdeikis
Affiliation:
Department of Physics, Materials Physics, Royal Institute of Technology, S-100 44 Stockholm, Sweden
A. S. FlodstrÖm
Affiliation:
Department of Physics, Materials Physics, Royal Institute of Technology, S-100 44 Stockholm, Sweden
I. Bryntse
Affiliation:
Department of Inorganic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden
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Abstract

Superconducting HgBa2CaCu2O6+δ (Hg-1212) thin films have been prepared by laser ablation followed by post-annealing at high temperatures. Two synthesis methods were investigated, using (1) direct reaction of Hg–Ba–Ca–Cu–O precursor films in a Hg-controlled ambience, and (2) thermal diffusion of Hg into Ba–Ca–Cu–O precursor films in a controlled atmosphere containing both Hg- and Tl-bearing species. Effects of the annealing temperature, time, and bulk material composition on the Hg-1212 film and residual impurities are presented. Surface morphologies, growth defects, and transport properties of Hg-1212 on SrTiO3 substrates are discussed. Formation of Hg-1212 films on MgO and LaAlO3 substrates is briefly described.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 3 , March 1998 , pp. 557 - 564
Copyright
Copyright © Materials Research Society 1998

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