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Pulsed Laser Deposition of High TC Superconducting Thin Films

Published online by Cambridge University Press:  28 February 2011

S.E. Russek ,
B.H. Moeckly ,
R.A. Buhrman ,
J.T. McWhirter ,
A.J. Sievers ,
M.G. Norton ,
L.A. Tietz  and
B. Carter
S.E. Russek
Affiliation:
School of Applied and Engineering Physics;
B.H. Moeckly
Affiliation:
School of Applied and Engineering Physics;
R.A. Buhrman
Affiliation:
School of Applied and Engineering Physics;
J.T. McWhirter
Affiliation:
Physics Department;
A.J. Sievers
Affiliation:
Physics Department;
M.G. Norton
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca NY,14853-2501
L.A. Tietz
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca NY,14853-2501
B. Carter
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca NY,14853-2501
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Abstract

In this paper we present results of studies of the effect of process variations and substrate surface conditions on the microstructure and electrical properties of laser deposited YBa2Cu3O7‐δ thin films. The principle conclusions are as follows. The film properties of YBa2Cu3O7‐δ are relatively constant over a large range of substrate temperatures (620C‐720C) and oxygen pressures (150‐800 mT). There are small compositional variations with substrate temperature similar to, but much smaller than, those seen in reactively sputtered films. The best films were grown at 670C in 400mT of oxygen and have a zero resistance Tc of 89K and Jc > 1x106A/cm2 at 77K. There are, however, variations in the Tc, Jc, and orientation of films grown on MgO under similar deposition conditions. These variations reflect differences in the nucleation and growth process of YBa2Cu3O7‐δ on MgO which can arise from subtle changes in substrate surface properties. In particular, while the films are predominantly oriented with c axis perpendicular and a,b axes in the plane of the substrate along the MgO[100] direction, there are variable amounts of grains whose in‐plane orientations are at large angles to the MgO [100] direction, leading to large angle grain boundaries in some films. These large angle grain boundaries are correlated with the presence of Josephson weak links in some small constrictions for films on MgO.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 455
Copyright
Copyright © Materials Research Society 1990

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References

1 Wu, X. D., Dijkkamp, D., Ogale, S. B., Inam, A., Chase, E. W., Miceli, P. F., Chang, C. C., Tarascon, J. M., and Venkatesan, T., Appl. Phys. Lett., 51,861 (1987).Google Scholar
2 Norton, M.G Tietz, L.A., Summerfelt, S.R., Carter, C.B., Appl. Phys. Lett., to be published.Google Scholar
3 Shin, D.H. Silcox, J., Russek, S.E., Lathrop, D.K., Moeckly, B., and Buhrman, R.A., in press.Google Scholar
4 Norton, M. G. Tietz, L. A., Carter, C. B., Russek, S. E., Moeckly, B. H., and Buhrman, R.A., Proceedings MRS Fall Meeting, Boston, MA, 1989 Google Scholar
5 Lathrop, D. K. Russek, S.E., Tanabe, K., and Buhrman, R.A., IEEE Trans Mgn. MAG‐25, 2218, 1989.Google Scholar
6 Moeckly, B. H. Lathrop, D. K., Redinbo, G. F., Russek, S.E., Buhrman, R.A., Proceedings MRS Fall Meeting, Boston, MA, 1989.Google Scholar