Highly oriented Tl₂Ba₂Ca₂Cu₃O₁₀ thin films by pulsed laser evaporation

Authors

Sy_Hwang Liou, University of Nebraska-LincolnFollow
K.D. Aylesworth, University of Nebraska - Lincoln
N.J. Ianno, University of Nebraska - Lincoln
B. Johs, University of Nebraska - Lincoln
D. Thompson, University of Nebraska - LincolnFollow
D. Meyer, University of Nebraska - Lincoln
John A. Woollam, University of Nebraska-LincolnFollow
Colleen Berry, Control Data Corporation, Omaha, Nebraska

Date of this Version

2-20-1989

Comments

Published by American Institute of Physics. Appl. Phys. Lett. 54, 760(1989). © 1989 American Institute of Physics. Permission to use. http://jap.aip.org/jap/.

Abstract

We have fabricated superconducting thin films on MgO(100) substrates with nearly pure Tl₂Ba₂Ca₂Cu₃O₁₀ (2:2:2:3) phase using pulsed laser evaporation and post-annealing. The films had c axes perpendicular to the substrates. Superconducting films with onset temperatures of 125 K and zero resistance at 110 K were obtained. X-ray microprobe fluorescence measurements indicate that a typical composition of films is Tl_0.66Ba_1.77Ca_1.46Cu₃O_χ, which is low in Tl compared to that expected for the 2:2:2:3 phase. A typical grain size is greater than 10 µm as revealed by scanning electron microscopy.