INVESTIGADORES
SERQUIS Adriana Cristina
artículos
Título:
Systematic Enhancement of in Field-Critical Current Density with Rare Rarth Ion Size Variance in Superconducting Rare Earth Barium Cuprate Films
Autor/es:
J. L. MACMANUS-DRISCOLL; S. R. FOLTYN; Q. X. JIA; H. WANG; A. SERQUIS; L. CIVALE; B. MAIOROV; D. PETERSON
Revista:
APPLIED PHYSICS LETTERS
Editorial:
American Institute of Physics
Referencias:
Año: 2004 vol. 84 p. 5329 - 5331
ISSN:
0003-6951
Resumen:
Enhanced in-field critical current densities sJcsd have been obtained in epitaxial superconductingsRE1,RE2d Ba2Cu3O7−x (RE1=rare-earth ion 1, and RE2=rare earth ion 2) films grown onboth single crystal and buffered metallic substrates. For a constant average RE ionic radius (equalto that of yttrium), there is a systematic dependence of the in-field Jc on the RE ion size variance,with a small, but nonzero, variance being optimum. Compared to the standard YBa2Cu3O7−xcomposition, a factor of two improvement in Jc s75.5 Kd is reproducibly observed at 0.2 T sicdfor the composition Dy1/3Ho2/3Ba2Cu3O7−x on both single crystal and buffered-metallic substrates.Angular dependent magnetic field studies and transmission electron microscopy indicate thepresence of additional pointlike random defects.
