Using magnetoelectric measurements and neutron diffraction, we investigated multiferroic properties of Co 2Y hexaferrite Ba 0.3Sr 1.7Co 2Fe 12O 22 in zero and finite magnetic field (H⊥c). Upon zero-field cooling, a longitudinal heliconical magnetic structure was observed below 280 K, which involves incommensurate planar helical ordering. When the magnetic field was applied perpendicular to its c axis, electric polarization was observed and the incommensurate ordering was replaced by a commensurate one as commonly observed in other hexaferrites. Electric polarization remained at its maximum during field reversal at 10 K, which indicates that magnetic anisotropy within the basal planes stabilizes the field-induced electric polarization.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2012 Sep 27|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics