Piezoresponse force microscopy and magnetic force microscopy characterization of γ-Fe2O3―BiFeO3 nanocomposite/Bi3.25La0.75Ti3O12 multiferroic bilayers

The multiferroic behavior of epitaxial gamma-Fe2O3-BiFeO3 (composite)/Bi3.25La0.75Ti3O12 bi-layered heterostructures grown on SrRuO3/SrTiO3 (1 1 1) substrates has been studied using piezoresponse force microscopy, magnetic force microscopy and magnetometry. The ferroelectric domain structure is ascr...

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Veröffentlicht in:	Journal of magnetism and magnetic materials 2009-06, Vol.321 (11), p.1799-1802
Hauptverfasser:	GAUTREAU, Olivier, HARNAGEA, Catalin, GUNAWAN, Lina, NECHACHE, Riad, SINGH, M. P, FOURNIER, P, BOTTON, Gianluigi A, PIGNOLET, Alain
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Dielectrics, piezoelectrics, and ferroelectrics and their properties Domain structure hysteresis Exact sciences and technology Ferroelectricity and antiferroelectricity Interfacial magnetic properties (multilayers, magnetic quantum wells, superlattices, magnetic heterostructures) Magnetic properties and materials Magnetic properties of surface, thin films and multilayers Physics
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Zusammenfassung:	The multiferroic behavior of epitaxial gamma-Fe2O3-BiFeO3 (composite)/Bi3.25La0.75Ti3O12 bi-layered heterostructures grown on SrRuO3/SrTiO3 (1 1 1) substrates has been studied using piezoresponse force microscopy, magnetic force microscopy and magnetometry. The ferroelectric domain structure is ascribed to the BiFeO3 phase while the magnetism originates in the gamma-Fe2O3 phase of the composite layer. Our studies demonstrate the presence and switching of magnetic and ferroelectric domains within the same area of the sample. This confirms the presence of multiferroic behavior at the nanoscale in our gamma-Fe2O3-BiFeO3 nanocomposite thin films.
ISSN:	0304-8853
DOI:	10.1016/j.jmmm.2009.02.009