Published September 15, 2003 | Version v1
Journal article

Ferroelectric properties of (Ba,Sr)TiO3 thin films grown on YBa2Cu3O7 layers

  • 1. National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Science, Beijing 100080 (China)

Description

Ferroelectric and superconductor bilayers of Ba1-xSrxTiO3 (BST)/YBa2Cu3 O7 (YBCO) are grown on (001) SrTiO3 substrates by magnetron sputtering and pulsed laser deposition. The BST thin films exhibit typical ferroelectric behavior in their hysteresis loops. Capacitance-voltage curves are measured. From the capacitance, a dielectric constant of 1250 is obtained. The current-voltage curve is fitted to investigate the mechanism of leakage. The Schottky barrier height at the Ag/BST interface is calculated to be 0.521 eV. The trapped level Et in BST is estimated to be 0.335 eV below the conduction-band edge. An energy band diagram of the Ag/BST/YBCO structure is proposed to explain the experimental results

Additional details

Identifiers

Publishing Information

Journal Title
Journal of Applied Physics
Journal Volume
94
Journal Issue
6
Journal Page Range
p. 4042-4046
ISSN
0021-8979
CODEN
JAPIAU

Optional Information

Notes
(c) 2003 American Institute of Physics.