Superconducting Tl-Ba-Ca-Cu-O films by sputtering

Authors

M. Hong, AT&T Bell Laboratories, Murray Hill, New Jersey
Sy_Hwang Liou, University of Nebraska-LincolnFollow
D.D. Bacon, AT&T Bell Laboratories, Murray Hill, New Jersey
G.S. Grader, AT&T Bell Laboratories, Murray Hill, New Jersey
J. Kwo, AT&T Bell Laboratories, Murray Hill, New Jersey
A.R. Kortan, AT&T Bell Laboratories, Murray Hill, New Jersey
B.A. Davidson, AT&T Bell Laboratories, Murray Hill, New Jersey

Date of this Version

November 1988

Comments

Published by American Institute of Physics. Appl. Phys. Lett. 53, 2102 (1988). © 1988 American Institute of Physics. Permission to use. Journal home page = http://jap.aip.org/jap/.

Abstract

Superconducting Tl-Ba-Ca-Cu-O thin films 0.2–1.0 µm thick have been prepared on MgO(100) and SrTiO₃ (100) substrates by dc diode sputtering using a single oxide target. Films containing primarily the Tl₂Ba₂Ca₁Cu₂O₈ phase were obtained with a T_c (R =0) at 102 K and a transport J_c of 10⁴ A/cm² at 90 K. For the nearly pure phase Tl₂Ba₂Ca₂Cu₃O₁₀ films, the T_c's (R =0) are higher at 116 K and the transport J_c's at 100 K are of 10⁵ A/cm². Both types of films show a strong preferred orientation with the c axis perpendicular to the film plane. The rocking curve of the Tl₂Ba₂Ca₂Cu₃O₁₀ films is 0.32° wide and the typical grain size is over 10 µm.