Epitaxial cuprate superconductor/ferroelectric heterostructures

Journal Article · Fri May 17 04:00:00 EDT 1991 · Science (Washington, D.C.); (United States)

DOI:https://doi.org/10.1126/science.252.5008.944· OSTI ID:5975153

Ramesh, R; Inam, A; Chan, W K; Wilkens, B; Myers, K; Remschnig, K; Hart, D L; Tarascon, J M ^[1]

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1. Bellcore, Red Bank, NJ (United States)

Thin-film heterostructures of Bi{sub 4}Ti{sub 3}O{sub 12}/Bi{sub 2}Sr{sub 2}CuO{sub 6 {plus}{chi}} have been grown on single crystals of SrTiO{sup 3}, LaAlO{sub 3}, and MgAl{sub 2}O{sub 4} 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 {times} 10{sup 5} volts per centimeter. Similar results were obtained with YBa{sub 2}Cu{sub 3}O{sub 7{minus}{chi}} and Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8{plus}{chi}} and single-crystal Bi{sub 2}Sr{sub 2}CuO{sub 6{plus}{chi}} as the bottom electrodes. These films look promising for use as novel, lattice-matched, epitaxial ferroelectric film/electrode heterostructures in nonvolatile memory applications.

• OSTI ID: 5975153
• Journal Information: Science (Washington, D.C.); (United States), Journal Name: Science (Washington, D.C.); (United States) Vol. 252:5008; ISSN SCIEA; ISSN 0036-8075
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
360607 -- Other Materials-- Superconducting Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
DATA
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
FILMS
INFORMATION
LASER RADIATION
MOLECULAR STRUCTURE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SCATTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
THIN FILMS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES