Epitaxial cuprate superconductor/ferroelectric heterostructures
Creators
- 1. Bellcore, Red Bank, NJ (United States)
Description
Thin-film heterostructures of Bi4Ti3O12/Bi2Sr2CuO6+χ have been grown on single crystals of SrTiO3, LaAlO3, and MgAl2O4 by pulsed laser deposition. X-ray diffraction studies show the presence of c-axis orientation only; Rutherford backscattering experiments show the composition to be close to the nominal stoichiometry. The films are ferroelectric and exhibit a symmetric hysteresis loop. The remanent polarization was 1.0 microcoulomb per square centimeter, and the coercive field was 2.0 x 105 volts per centimeter. Similar results were obtained with YBa2Cu3O7-χ and Bi2Sr2CaCu2O8+χ and single-crystal Bi2Sr2CuO6+χ as the bottom electrodes. These films look promising for use as novel, lattice-matched, epitaxial ferroelectric film/electrode heterostructures in nonvolatile memory applications
Additional details
Publishing Information
- Journal Title
- Science (Washington, D.C.)
- Journal Volume
- 252
- Journal Issue
- 5008
- Series
- Science (Washington, D.C.).
- Journal Page Range
- 944-946
- ISSN
- 0036-8075
- CODEN
- SCIEA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 23029629
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BARIUM OXIDES; BISMUTH OXIDES; CALCIUM OXIDES; COPPER OXIDES; EXPERIMENTAL DATA; LASER RADIATION; MOLECULAR STRUCTURE; STRONTIUM OXIDES; SUPERCONDUCTIVITY; THIN FILMS; TITANIUM OXIDES; X-RAY DIFFRACTION; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; DATA; DIFFRACTION; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELECTROMAGNETIC RADIATION; FILMS; INFORMATION; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RADIATIONS; SCATTERING; STRONTIUM COMPOUNDS; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS