Chemically prepared PZT films doped with niobium
We report on the first ferroelectric measurements of chemically prepared thin films of PZT containing niobium, (PNZT). Polycrystalline, perovskite PNZT thin films were fabricated by spin coating Pt coated SiO{sub 2}/Si substrates with alkoxide solutions. We systematically doped our base composition, PZT 53/47, with niobium (0 to 10 at.%). Further compositional modifications included the variation of Zr/Ti ratio for films containing 2 at.% Nb. The dielectric constants measured for PNZT 2/56/44, 2/53/47 and 2/48/52 films were in good agreement with bulk values. Dielectric constants on the order of 700, 1000 and 500, respectively, were measured for these three films. Both linear and nonlinear current-voltage behavior was observed for our Pt/PNZT/Pt device structures, depending on the amplitude of the applied voltage and the temperature of measurement. We were able to make ferroelectric films of PNZT 2/53/47 (2 at.% Nb doping) with spontaneous polarizations of 0.2 C/m{sup 2} and coercive fields of 2.5 MV/m. PNZT films containing larger niobium additions (5 and 10 at.%) had inferior ferroelectric properties because of the presence of nonperovskite phases. 8 refs., 5 figs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5053432
- Report Number(s):
- SAND-89-1480C; CONF-8910120--7; ON: DE90006811
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
CHALCOGENIDES
CHEMICAL PREPARATION
COHERENT SCATTERING
DIFFRACTION
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
FERROELECTRIC MATERIALS
FILMS
LEAD COMPOUNDS
LEAD OXIDES
MATERIALS
METALS
NIOBIUM
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PLATINUM
PLATINUM METALS
PZT
SCATTERING
SOLUBILITY
SYNTHESIS
THIN FILMS
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
X-RAY DIFFRACTION
ZIRCONATES
ZIRCONIUM COMPOUNDS