Blog
About

  • Record: found
  • Abstract: found
  • Article: found
Is Open Access

Ferroelastic switching in a layered-perovskite thin film

Read this article at

Bookmark
      There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

      Abstract

      A controllable ferroelastic switching in ferroelectric/multiferroic oxides is highly desirable due to the non-volatile strain and possible coupling between lattice and other order parameter in heterostructures. However, a substrate clamping usually inhibits their elastic deformation in thin films without micro/nano-patterned structure so that the integration of the non-volatile strain with thin film devices is challenging. Here, we report that reversible in-plane elastic switching with a non-volatile strain of approximately 0.4% can be achieved in layered-perovskite Bi2WO6 thin films, where the ferroelectric polarization rotates by 90° within four in-plane preferred orientations. Phase-field simulation indicates that the energy barrier of ferroelastic switching in orthorhombic Bi2WO6 film is ten times lower than the one in PbTiO3 films, revealing the origin of the switching with negligible substrate constraint. The reversible control of the in-plane strain in this layered-perovskite thin film demonstrates a new pathway to integrate mechanical deformation with nanoscale electronic and/or magnetoelectronic applications.

      Abstract

      Ferroelastic switching in thin films is typically restricted by constraints from the substrate or occurs around twin-like domains. Here, the authors show reversible and non-volatile ferroelastic switching avoiding substrate constraints in layered-perovskite Bi_2WO_6 epitaxial films.

      Related collections

      Most cited references 29

      • Record: found
      • Abstract: found
      • Article: not found

      Multiferroic and magnetoelectric materials.

      A ferroelectric crystal exhibits a stable and switchable electrical polarization that is manifested in the form of cooperative atomic displacements. A ferromagnetic crystal exhibits a stable and switchable magnetization that arises through the quantum mechanical phenomenon of exchange. There are very few 'multiferroic' materials that exhibit both of these properties, but the 'magnetoelectric' coupling of magnetic and electrical properties is a more general and widespread phenomenon. Although work in this area can be traced back to pioneering research in the 1950s and 1960s, there has been a recent resurgence of interest driven by long-term technological aspirations.
        Bookmark
        • Record: found
        • Abstract: found
        • Article: not found

        Multiferroic BaTiO3-CoFe2O4 Nanostructures.

        We report on the coupling between ferroelectric and magnetic order parameters in a nanostructured BaTiO3-CoFe2O4 ferroelectromagnet. This facilitates the interconversion of energies stored in electric and magnetic fields and plays an important role in many devices, including transducers, field sensors, etc. Such nanostructures were deposited on single-crystal SrTiO3 (001) substrates by pulsed laser deposition from a single Ba-Ti-Co-Fe-oxide target. The films are epitaxial in-plane as well as out-of-plane with self-assembled hexagonal arrays of CoFe2O4 nanopillars embedded in a BaTiO3 matrix. The CoFe2O4 nanopillars have uniform size and average spacing of 20 to 30 nanometers. Temperature-dependent magnetic measurements illustrate the coupling between the two order parameters, which is manifested as a change in magnetization at the ferroelectric Curie temperature. Thermodynamic analyses show that the magnetoelectric coupling in such a nanostructure can be understood on the basis of the strong elastic interactions between the two phases.
          Bookmark
          • Record: found
          • Abstract: found
          • Article: not found

          Applications of modern ferroelectrics.

          Long viewed as a topic in classical physics, ferroelectricity can be described by a quantum mechanical ab initio theory. Thin-film nanoscale device structures integrated onto Si chips have made inroads into the semiconductor industry. Recent prototype applications include ultrafast switching, cheap room-temperature magnetic-field detectors, piezoelectric nanotubes for microfluidic systems, electrocaloric coolers for computers, phased-array radar, and three-dimensional trenched capacitors for dynamic random access memories. Terabit-per-square-inch ferroelectric arrays of lead zirconate titanate have been reported on Pt nanowire interconnects and nanorings with 5-nanometer diameters. Finally, electron emission from ferroelectrics yields cheap, high-power microwave devices and miniature x-ray and neutron sources.
            Bookmark

            Author and article information

            Affiliations
            [1 ]Department of Physics, Beijing Normal University , 100875 Beijing, China
            [2 ]EMAT (Electron Microscopy for Materials Science), University of Antwerp , Groenenborgerlaan 171, B-2020 Antwerpen, Belgium
            [3 ]Institute of Microstructures and Properties of Advanced Materials, Beijing University of Technology , 100124 Beijing, China
            [4 ]State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University , 100084 Beijing, China
            [5 ]Tsinghua National Laboratory for Information Science and Technology, Institute of Microelectronics, Tsinghua University , 100084 Beijing, China
            [6 ]National Synchrotron Radiation Laboratory and CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China , 230026 Hefei, China
            [7 ]Department of Materials Science and Engineering, University of California , 94720 Berkeley, California, USA
            [8 ]Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Science , 100190 Beijing, China
            [9 ]Department of Materials Science and Engineering, The Pennsylvania State University, University Park , Pennsylvania, 16802 Pennsylvania, USA
            Author notes
            [*]

            These authors contributed equally to this work.

            Journal
            Nat Commun
            Nat Commun
            Nature Communications
            Nature Publishing Group
            2041-1723
            03 February 2016
            2016
            : 7
            26838483
            4743001
            ncomms10636
            10.1038/ncomms10636
            Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved.

            This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

            Categories
            Article

            Uncategorized

            Comments

            Comment on this article