Crystalline orientations of Tl₂Ba₂Ca₂Cu₃O_χ grains on MgO, SrTiO₃, and LaAlO₃ substrates

Authors

Sy_Hwang Liou, University of Nebraska-LincolnFollow
C.Y. Wu, University of Nebraska - Lincoln

Date of this Version

June 1992

Comments

Published by American Institute of Physics. Appl. Phys. Lett. 60, 2803(1992). © 1992 American Institute of Physics. Permission to use. http://jap.aip.org/jap/.

Abstract

Crystalline orientations of Tl₂Ba₂Ca₂Cu₃O_χ grains in magnetron sputtered films on MgO (001), SrTiO₃ (001), and LaAlO₃ (001) substrates were investigated by scanning electron microscopy. In contrast to the nearly single crystalline films on the lattice matched substrates SrTiO₃ and LaAlO₃, films on the MgO (001) substrate, being polycrystalline in nature, exhibit several preferred in-plane grain orientations. These orientations agree well with a simplified theory of near-coincidence site lattices between Tl₂Ba₂Ca₂Cu₃O_χ and MgO.