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Comparative Study of Thickness Dependence of Critical Current Density of Yba2Cu3O7–δ on (100) SrTiO3 and on Rolling-assisted Biaxially Textured Substrates

Published online by Cambridge University Press:  31 January 2011

B. W. Kang ,
A. Goyal ,
D. F. Lee ,
J. E. Mathis ,
E. D. Specht ,
P. M. Martin ,
D. M. Kroeger ,
M. Paranthaman  and
S. Sathyamurthy
B. W. Kang
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831
A. Goyal
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831
D. F. Lee
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831
J. E. Mathis
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831
E. D. Specht
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831
P. M. Martin
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831
D. M. Kroeger
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831
M. Paranthaman
Affiliation:
Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
S. Sathyamurthy
Affiliation:
Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
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Abstract

We investigated the dependence of critical current density (Jc) on thickness of Yba2Cu3O7−δ (YBCO) films grown by pulsed laser deposition on (100) SrTiO3 (STO) and on rolling-assisted biaxially textured substrates (RABiTS). The thickness of YBCO films varied from 0.19 to 3 μm. The highest Jcs of 5.3 and 2.6 MA/cm2 at 77 K, self-field were obtained for 0.19-μm YBCO films on STO and RABiTS, respectively. Jc was found to decrease exponentially with YBCO thickness on both substrates. However, the results suggest different mechanisms are responsible for the Jc reduction in the two cases. On STO, growth of a-axis grains within c-axis films and broadening of the in-plane texture were observed in thick films. On RABiTS, degradation in cube texture as well as development of a porous surface morphology were found to correlate with film thickness.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 7 , July 2002 , pp. 1750 - 1757
Copyright
Copyright © Materials Research Society 2002

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