Electric field-induced magnetization switching in epitaxial columnar nanostructures.
We present direct evidence for room-temperature magnetization reversal induced by an electric field in epitaxial ferroelectric BiFeO3-ferrimagnetic CoFe2O4 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 approximately 1.0 x 10(-2) G cm/V. The observed effect is due to the strong elastic coupling between the two ferric constituents as the result of the three-dimensional heteroepitaxy.
Zavaliche
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Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA. zavaliche@berkeley.edu
Zheng
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Mohaddes-Ardabili
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Yang
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Zhan
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Shafer
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Reilly
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Chopdekar
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Jia
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Wright
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Schlom
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Suzuki
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Ramesh
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