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Growth of a-axis-oriented HgBa2CaCu2Oxthin films by rapid quenching

Published online by Cambridge University Press:  31 January 2011

S. H. Yun ,
U. O. Karlsson ,
B. J. Jönsson ,
K. V. Rao  and
L. D. Madsen
S. H. Yun
Affiliation:
Department of Physics, Materials Physics, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
U. O. Karlsson
Affiliation:
Department of Physics, Materials Physics, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
B. J. Jönsson
Affiliation:
Department of Condensed Matter Physics, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
K. V. Rao
Affiliation:
Department of Condensed Matter Physics, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
L. D. Madsen
Affiliation:
Department of Physics, Linköping University, SE-58183 Linköping, Sweden
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Abstract

High-quality a-axis-oriented HgBa2CaCu2Ox superconducting thin films have been grown on (100) LaAlO3 substrates using a modified conventional method that contains a short annealing time of 5 min, rapid-quenching process, and an alternative encapsulated approach. We found that the preferred orientations of HgBa2CaCu2Ox thin films can be controlled by rapid quenching at specific temperatures: 800, 700, 600, and 500 °C. The films rapidly quenched in water from 700 °C during a cooling cycle showed predominantly a-axis orientation perpendicular to the film surface. Phase was confirmed by x-ray diffraction pole figures. The a-axis films exhibited a zero-resistance transition temperature >120 K, which is comparable to epitaxial c-axis-oriented films.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 14 , Issue 8 , August 1999 , pp. 3181 - 3184
Copyright
Copyright © Materials Research Society 1999

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References

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