%0 Journal Article
%K Chemical analysis
%K Nanostructured materials
%K Atomic force microscopy
%K Ferroelectric materials
%K Epitaxial growth
%K Bismuth compounds
%K Magnetization
%K Piezoelectricity
%K Electric field effects
%K Piezoelectric force microscopy (PEM)
%K Elastic coupling
%K Magnetic force microscopy (MFM)
%K Magnetization switching
%K Switching circuits
%A F Zavaliche
%A H Zheng
%A L Mohaddes-Ardabili
%A S.Y Yang
%A Q Zhan
%A P Shafer
%A E Reilly
%A R Chopdekar
%A Y Jia
%A P Wright
%A D.G Schlom
%A Y Suzuki
%A Ramamoorthy Ramesh
%B Nano Letters
%D 2005
%G eng
%P 1793-1796
%R 10.1021/nl051406i
%T Electric field-induced magnetization switching in epitaxial columnar nanostructures
%V 5
%X We present direct evidence for room-temperature magnetization reversal induced by an electric field in epitaxial ferroelectric BiFeO 3-ferrimagnetic CoFe 2O 4 columnar nanostructures. Piezoelectric force microscopy and magnetic force microscopy were used to locally image the coupled piezoelectric-magnetic switching. Quantitative analyses give a perpendicular magnetoelectric susceptibility of ∼1.0 × 10 -2 G cm/V. The observed effect is due to the strong elastic coupling between the two ferroic constituents as the result of the three-dimensional heteroepitaxy. © 2005 American Chemical Society.