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

Journal Article · Mon Jan 05 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4905343· OSTI ID:22395661

Lorenz, Michael; Schwinkendorf, Peter; Grundmann, Marius ^[1]; Wagner, Gerald; Oeckler, Oliver ^[2]; Lazenka, Vera; Modarresi, Hiwa; Vantomme, André; Temst, Kristiaan ^[3]; Van Bael, Margriet J. ^[4]

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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)

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.

• OSTI ID: 22395661
• Journal Information: Applied Physics Letters, Vol. 106, Issue 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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