Abstract
A composite nanocapacitor was fabricated based on ferroelectric PbZr0.52Ti0.48O3(PZT) and half-metallic oxide La0.67Sr0.33MnO3(LSMO) with 5 nm/1 nm periodicity, respectively. X-ray θ-2θ scan and Φ-scan revealed epitaxial growth of nanocapacitors. At room temperature, a microscopic polarization of 11 μC/cm2 and magnetization of 50 emu/cm3 were measured for superlattice nanocapacitors. Local piezo force microscopy measurements revealed switching of polarization under external bias field confirming ferroelectric behavior. Zero field cooling measurements showed the existence of cusp in magnetization at low temperatures indicating spin-glass-like behavior contrary to Pb(ZrxTi1−x)O3/LaxSr1−xMnO3 bilayer structure. Frequency dependent dielectric anomaly was observed near room temperature suggesting dynamic magneto (resistance)-dielectric coupling.
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