INVESTIGADORES
SERQUIS Adriana Cristina
artículos
Título:
Identification of intrinsic ab-plane pinning in YBa2Cu3O7 thin films and coated conductors
Autor/es:
L. CIVALE; B. MAIOROV; J. L. MACMANUS-DRISCOLL; H. WANG; T. G. HOLESINGER; S. R. FOLTYN; A. SERQUIS; P. N. ARENDT
Revista:
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
Editorial:
IEEE
Referencias:
Año: 2005 vol. 15 p. 2808 - 2811
ISSN:
1051-8223
Resumen:
The angular-dependent critical current
density in YBa2Cu3O7 films grown by pulsed laser deposition
exhibit asharp peak for magnetic field orientations
near the ab plane, which arises from the combined effects of
intrinsic pinning and extended defects parallel to the planes. An analysis
of the temperature and field dependence of the height and width of
this peak allows us to distinguish both contributions. We find
that, in a film on single crystal substrate, the peak at low fields
is due primarily to the extended defects, but at high fields it is dominated
by intrinsic pinning.We compare these results with those of
coated conductors with a larger density of ab-oriented
correlated defects. We show a novel effect consisting in an inverse correlation between and the power law exponent (N) of the I-V curves
that only occurs in the intrinsic-pinning dominated regime, and we
present an interpretation of its origin.
