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High Critical Current Density in Ultrathin Ybco Films

Published online by Cambridge University Press:  28 February 2011

X.X. Xi ,
W. Schauer ,
V. Windte ,
O. Meyer ,
G. Linker ,
Q. Li  and
J. Geerk
X.X. Xi
Affiliation:
Physics Department, Rutgers University, Piscataway, NJ 08854
W. Schauer
Affiliation:
ITP, P.O.Box 3640,D‐7500 Karlsruhe, FRG.
V. Windte
Affiliation:
ITP, P.O.Box 3640,D‐7500 Karlsruhe, FRG.
O. Meyer
Affiliation:
Kernforschungszentrum Karlsruhe,INFP
G. Linker
Affiliation:
Kernforschungszentrum Karlsruhe,INFP
Q. Li
Affiliation:
Physics Department, Rutgers University, Piscataway, NJ 08854
J. Geerk
Affiliation:
Kernforschungszentrum Karlsruhe,INFP
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Abstract

Measurements of the critical current density Jc for ultrathin YBa2Cu307‐X (YBCO) films are presented.A high Jc value at 77K in zero field of 2xl06A/cm2 was obtained in a 30nm thick film and even a 5nm thick film could carry a supercurrent of 3.5x105 A/cm2 at 4.2K in zero field. A very weak field‐dependence of Jc was observed when the field was in the (a,b) plane showing greatly depressed dissipation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 867
Copyright
Copyright © Materials Research Society 1990

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References

1 Tinkham, M., Phys. Rev. Lett. 61, 1658(1988)Google Scholar
2 Xi, X.X., Geerk, J., Linker, G., Li, Q. and Meyer, O., Appl. Phys. Lett. 54, 2367(1989)Google Scholar
3 Xi, X.X., Linker, G., Meyer, O., Nold, E., Obst, B., Ratzel, F., Smithey, R., Strehlau, B., Weschenfelder, F. and Geerk, J., Z. Phys. B74, 13 (1989)Google Scholar
4 Hettinger, J.D., Swanson, A.G., Skocpol, W.J., Brooks, J.S., Greybeal, J.M., Mankiewich, P.M., Howard, R.E., Straughn, B.L. and Burkhardt, E.G., Phys. Rev. Lett. 62, 2044(1989)Google Scholar