title: Epitaxial cuprate superconductor/ferroelectric heterostructures.
abstract: Thin-film heterostructures of Bi(4)Ti(3)O(12)Bi(2)Sr(2)CuO(6+x), have been grown on single crystals of SrTiO(3), LaAlO(3), and MgAl(2)O(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 x 10(5) volts per centimeter. Similar results were obtained with YBa(2)Cu(3)O(7-x) and Bi(2)Sr(2)CaCu(2)O(8+x), and single-crystal Bi(2)Sr(2)CuO(6+x)as the bottom electrodes. These films look promising for use as novel, lattice-matched, epitaxial ferroelectric film/electrode heterostructures in nonvolatile memory applications.
authors.forename: R
authors.initials: R
authors.lastname: Ramesh
authors.forename: A
authors.initials: A
authors.lastname: Inam
authors.forename: W K
authors.initials: WK
authors.lastname: Chan
authors.forename: B
authors.initials: B
authors.lastname: Wilkens
authors.forename: K
authors.initials: K
authors.lastname: Myers
authors.forename: K
authors.initials: K
authors.lastname: Remschnig
authors.forename: D L
authors.initials: DL
authors.lastname: Hart
authors.forename: J M
authors.initials: JM
authors.lastname: Tarascon