Physics – Condensed Matter – Materials Science
Scientific paper
2005-03-25
J. Appl. Phys. 97 (2005) 103914
Physics
Condensed Matter
Materials Science
to be published in J. Appl. Phys
Scientific paper
10.1063/1.1904153
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 magneto-electric 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 magneto-electric coupling which is responsible for MR in these systems is stronger in multilayers than in their trilayer counterparts.
Mercey Bernard
Murugavel Pattukkannu
Prellier Wilfrid
Raveau Bernard
Simon Ch.
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