Magnetic Effects on Dielectric and Polarization Behavior of Multiferroic Hetrostructures

Details Magnetic Effects on Dielectric and Polarization Behavior of Multiferroic Hetrostructures Magnetic Effects on Dielectric and Polarization Behavior of Multiferroic Hetrostructures

2010-02-09

arxiv.org/abs/1002.1988v1

Physics

Condensed Matter

Materials Science

9 pages, 4 figures

Scientific paper

PbZr0.52Ti0.48O3/La0.67Sr0.33MnO3(PZT/LSMO) bilayer with surface roughness ~ 1.8 nm thin films have been grown by pulsed laser deposition on LaAlO3(LAO) substrates. High remnant polarization (30-54 micro C/cm2), dielectric constant(400-1700), and well saturated magnetization were observed depending upon the deposition temperature of the ferromagnetic layer and applied frequencies. Giant frequency-dependent change in dielectric constant and loss were observed above the ferromagnetic-paramagnetic temperature. The frequency dependent dielectric anomalies are attributed to the change in metallic and magnetic nature of LSMO and also the interfacial effect across the bilayer; an enhanced magnetoelectric interaction may be due to the Parish-Littlewood mechanism of inhomogeneity near the metal-dielectric interface.

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