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JOURNAL OF APPLIED PHYSICS
Volume 97, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1904153
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A series of superlattices and trilayers composed of ferromagnetic and ferroelectric or paraelectric layers were grown on (100) SrTiO3 by the pulsed-laser deposition technique. Their structural and maunetoelectric properties were examined. The superlattices made of ferromagnetic Pr0.85Ca0.15MnO3 (PCMO) and a ferroelectric, namely, Ba0.6Sr0.4TiO3 (BST) or BaTiO3, showed enhanced magnetoresistance (MR) at high applied magnetic field, whereas such enhancement was absent in Pr0.85Ca0.15MnO3/SrTiO3 superlattices, which clearly demonstrates the preponderant role of the ferroelectric layers in this enhanced MR. Furthermore, the absence of enhanced MR in trilayers of PCMO/BST indicates that the magnetoelectric coupling which is responsible for MR in these systems is stronger in multilayers than in their trilayer counterparts. (c) 2005 American Institute of Physics.
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