Publication Type:
Journal ArticleSource:
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 circuitsAbstract:
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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