Direct measurement of magnetoelectric exchange in self-assembled epitaxial BiFeO3-CoFe2O4 nanocomposite thin films
Wang, Z. G.
Lei, G. Y.
Viehland, Dwight D.
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We report the direct measurement of a magnetoelectric (ME) exchange between magnetostrictive CoFe2O4 nanopillars in a piezoelectric BiFeO3 matrix for single-layer nanocomposite epitaxial thin films grown on (001) SrTiO3 substrates with SrRuO3 bottom electrodes. The ME coefficient was measured by a magnetic cantilever method and had a maximum value of similar to 20 mV/cm Oe. The films possessed saturation polarization (60 mu C/cm(2)) and magnetization (410 emu/cc) properties equivalent to bulk values, with typical hysteresis loops.