Publication Type:Journal Article
Source:Nano Letters, Volume 5, Number 9, p.1793-1796 (2005)
Keywords:atomic force microscopy, bismuth compounds, chemical analysis, Elastic coupling, Electric field effects, Epitaxial growth, Ferroelectric materials, Magnetic force microscopy, Magnetization, Magnetization switching, nanostructured materials, Piezoelectric force microscopy, piezoelectricity, Switching circuits
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.
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