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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Azevedo, Nuno Monteiro |
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Mitchell, John F.
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article
Multiferroic composite ferroelectric-ferromagnetic films
Abstract
Multiferroic behavior was confirmed for epitaxial composite ferroelectric-ferromagnetic heterostructures, using a ferromagnetic crystal as both substrate and straining medium. Heterostructures having 2-2 connectivity (plane-on-plane) were fabricated by chemical solution deposition of Pb(Zr0.3,Ti0.7)O3 (PZT) thin films on La1.2Sr1.8Mn2O7 (LSMO) single crystal substrates. Magnetostriction (0.13%) of the substrate at its transition temperature (∼105K) induces an abrupt 7.3% increase in switchable polarization of the PZT. This confirmation of elastic coupling induced by the onset of ferromagnetism is a first step toward fabricating such structures for study of the interrelationship of their magnetic and electrical field-dependent behaviors.