TITLE

Magnetic flux pinning enhancement in HgBa2CaCu2O6+δ films on vicinal substrates

AUTHOR(S)
Xie, Y.Y.; Wu, J.Z.; Yun, S.H.; Emergo, R.; Aga, R.; Christen, D.K.
PUB. DATE
July 2004
SOURCE
Applied Physics Letters;7/5/2004, Vol. 85 Issue 1, p70
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
High-temperature superconducting HgBa2CaCu2O6+δ films were fabricated on the vicinal surfaces of 4°-miscut SrTiO3 single crystal substrates in a cation-exchange process, with the purpose to induce additional growth defects via a step-flow growth mode on the miscut substrates. The critical current densities (Jc) of these films were measured using a standard four-probe method with magnetic fields applied perpendicular to the film surface. The vicinal Hg-1212 films indeed showed higher Jc’s in magnetic fields and irreversibility fields (Hirr) than that on 0°-cut SrTiO3. Hirr at 77 K is 2.1 T for the film grown 0°-cut SrTiO3, and is enhanced to 2.7 T for the one grown on 4°-miscut SrTiO3. If optimized so that the shape and the density of the defects can be controlled experimentally, this may be a promising way of improve magnetic flux pinning for many practical applications related to coated conductors.
ACCESSION #
13605595

 

Related Articles

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics