Title :
Properties of YBa2Cu3O7-δ thin films grown on off-axis-cut MgO substrates
Author :
Russek, S.E. ; Jeanneret, B. ; Rudman, D.A. ; Ekin, J.W.
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
A series of YBa2Cu3O7-δ films has been reactively sputtered on off-axis-cut MgO substrates. All the films were oriented with the c axis normal to the substrate regardless of substrate orientation, indicating that growth dynamics is a major factor influencing film orientation on nonlattice-matched substrates. As the substrate orientation was moved off the [100] direction, the films showed a decrease in transition temperature and showed properties indicative of an increased density of weak links. The films grown on high-angle substrates showed better properties than the films grown on low-angle substrates. Films grown on (110) MgO were as good as films grown on (100) MgO
Keywords :
barium compounds; high-temperature superconductors; sputtered coatings; superconducting thin films; superconducting transition temperature; yttrium compounds; MgO substrates; YBa2Cu3O7-δ thin films; density of weak links; film orientation; growth dynamics; high temperature superconductors; high-angle substrates; low-angle substrates; nonlattice-matched substrates; off-axis-cut; properties; reactively sputtered; substrate orientation; transition temperature; Amorphous magnetic materials; Grain boundaries; Magnetic films; Morphology; NIST; Optical films; Substrates; Superconducting films; Superconducting transition temperature; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
