Ferroelectric bismuth titanate/superconductor (Y-Ba-Cu-O) thin-film heterostructures on silicon

Journal Article · Mon Sep 30 04:00:00 EDT 1991 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.106199· OSTI ID:5167342

Ramesh, R; Inam, A; Wilkens, B; Chan, W K; Sands, T; Tarascon, J M ^[1]; Fork, D K; Geballe, T H ^[2]; Evans, J; Bullington, J ^[3]

---

1. Bellcore, Red Bank, New Jersey (USA)
2. Stanford University, Stanford, California (USA)
3. Radiant Technologies, Albuquerque, New Mexico (USA)

The growth by pulsed-laser deposition of {ital c}-axis-oriented bismuth titanate (BTO)/YBa{sub 2}Cu{sub 3}O{sub 7}(YBCO) superconductor heterostructures on (001)-oriented Si with epitaxial yttria-stabilized ZrO{sub 2} as a buffer layer is reported. X-ray-diffraction studies of the heterostructures show that all the layers grow in the {ital c}-axis orientation, with a rocking angle of 1.0{degree}--1.2{degree} for the bismuth titanate layer and 0.6{degree}--0.8{degree} for the YBCO layer. Rutherford backscattering ion channeling yields of 28% at the surface have been obtained. Transmission electron microscopy of cross-sectioned samples reveal that the BTO layer has a significant density of translational boundaries that propagate at 45{degree} to the film surface. The BTO film exhibits ferroelectric hysteresis and a dielectric constant in the range of 180--200.

• OSTI ID: 5167342
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 59:14; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DEPOSITION
FERROELECTRIC MATERIALS
HETEROJUNCTIONS
HIGH-TC SUPERCONDUCTORS
JUNCTIONS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
SEMICONDUCTOR JUNCTIONS
SUPERCONDUCTORS
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES