skip to main content

SciTech ConnectSciTech Connect

Title: Correlation of magnetoelectric coupling in multiferroic BaTiO{sub 3}-BiFeO{sub 3} superlattices with oxygen vacancies and antiphase octahedral rotations

Multiferroic (BaTiO{sub 3}-BiFeO{sub 3}) × 15 multilayer heterostructures show high magnetoelectric (ME) coefficients α{sub ME} up to 24 V/cm·Oe at 300 K. This value is much higher than that of a single-phase BiFeO{sub 3} reference film (α{sub ME} = 4.2 V/cm·Oe). We found clear correlation of ME coefficients with increasing oxygen partial pressure during growth. ME coupling is highest for lower density of oxygen vacancy-related defects. Detailed scanning transmission electron microscopy and selected area electron diffraction microstructural investigations at 300 K revealed antiphase rotations of the oxygen octahedra in the BaTiO{sub 3} single layers, which are an additional correlated defect structure of the multilayers.
Authors:
; ;  [1] ; ;  [2] ; ; ; ;  [3] ;  [4]
  1. Institut für Experimentelle Physik II, Universität Leipzig, D-04103 Leipzig (Germany)
  2. Institut für Mineralogie, Kristallographie und Materialwissenschaft, Universität Leipzig, D-04275 Leipzig (Germany)
  3. Instituut voor Kern- en Stralingsfysica, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven (Belgium)
  4. Laboratorium voor Vaste-Stoffysica en Magnetisme, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven (Belgium)
Publication Date:
OSTI Identifier:
22395661
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BARIUM COMPOUNDS; BISMUTH COMPOUNDS; CORRELATIONS; COUPLING; ELECTRICAL PROPERTIES; ELECTRON DIFFRACTION; FERRITES; FILMS; HETEROJUNCTIONS; LAYERS; MAGNETIC PROPERTIES; MICROSTRUCTURE; OXYGEN; PARTIAL PRESSURE; ROTATION; SUPERLATTICES; TITANATES; TRANSMISSION ELECTRON MICROSCOPY; VACANCIES