Quantitative determination of anisotropic magnetoelectric coupling in BiFeO${}_3$-CoFe${}_2$O${}_4$ nanostructures

Abstract

The transverse and longitudinal magnetoelectric susceptibilities (MES) were quantitatively determined for (001) heteroepitaxial BiFeO${}_3$-CoFe${}_2$O${}_4$ nanostructures. Both of these MES values were sharply enhanced at magnetic fields below 6 kOe and revealed asymmetric lineshapes with respect to the dc magnetic field, demonstrating the strain-induced magnetoelectric effect. The maximum transverse MES, which reached as high as $\sim$60 mV/cm Oe, was about five times larger than the longitudinal MES. This observation signifies that transverse magnetostriction of the CoFe${}_2$O${}_4$ nanopillars is enhanced more than the bulk value due to preferred magnetic domain alignment along the [001] direction coming from compressive, heteroepitaxial strain.

8 pages, 3 figures

References in corpus (2)

• Effect of epitaxial strain on the spontaneous polarization of thin film ferroelectrics
• Magnetoelectric effects of nanoparticulate Pb(Zr0.52Ti0.48)O3-NiFe2O4 composite films

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• Large Longitudinal Magnetoelectric Coupling in NiFe2O4-BaTiO3 Laminates
• Strong magnetoelastic effect on the magnetoelectric phenomena of TbMn${}_2$O${}_5$