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In-Situ Processing of Epitaxial and Textured High Tc Superconducting Hoba2Cu3O7.X Thin Films By Pulsed Laser Evaporation Technique

Published online by Cambridge University Press:  28 February 2011

C. B. Lee ,
R. Prasad ,
A. K. Singh ,
S. Sharan ,
R. K. Singh ,
P. Tiwari ,
J. Narayan ,
O. W. Holland  and
L. A. Boatner
C. B. Lee
Affiliation:
Dept. of Materials Science and Engineering N.C.State University Raleigh, N.C. 27695‐7916
R. Prasad
Affiliation:
Dept. of Materials Science and Engineering N.C.State University Raleigh, N.C. 27695‐7916
A. K. Singh
Affiliation:
Dept. of Materials Science and Engineering N.C.State University Raleigh, N.C. 27695‐7916
S. Sharan
Affiliation:
Dept. of Materials Science and Engineering N.C.State University Raleigh, N.C. 27695‐7916
R. K. Singh
Affiliation:
Dept. of Materials Science and Engineering N.C.State University Raleigh, N.C. 27695‐7916
P. Tiwari
Affiliation:
Dept. of Materials Science and Engineering N.C.State University Raleigh, N.C. 27695‐7916
J. Narayan
Affiliation:
Dept. of Materials Science and Engineering N.C.State University Raleigh, N.C. 27695‐7916
O. W. Holland
Affiliation:
Solid State Divison OakRidge National Laboratory OakRidge.TN 37831
L. A. Boatner
Affiliation:
Solid State Divison OakRidge National Laboratory OakRidge.TN 37831
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Abstract

Excellent quality epitaxial and textured superconducting HoBa2Cu307.x (Ho 123) thin films have been fabricated on lattice matched (100) KTaO3 and (100) LaAlO3, and lattice mismatched (100) MgO substrates by the pulsed laser evaporation (PLE) technique. A bulk Hol23 target was evaporated using nanosecond excimer laser pulses with the evaporating material depositing on a substrate maintained in the temperature range of 550‐650°C. The temperature for zero resistance for HoBa2Cu3O7_x films deposited on various substrates at 650°C varied between 85 to 89K. The epitaxial films deposited on (100) LaA103 substrates exhibited critical current densities greater than 3.5 x 106 Amps/cm2 at 77 K. The superconducting properties of the Ho 123 films were found to be similar to Y123 films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 459
Copyright
Copyright © Materials Research Society 1990

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References

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