Room temperature multiferroic effects in superlattice nanocapacitors

S. Dussan, A. Kumar, J. F. Scott, S. Priya, R. S. Katiyar

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Abstract

A composite nanocapacitor was fabricated based on ferroelectric PbZr 0.52 TiM0.48 O3 (PZT) and half-metallic oxide La0.67 Sr0.33 MnO3 (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 (Zrx Ti1-x) O3/Lax Sr 1-x MnO3 bilayer structure. Frequency dependent dielectric anomaly was observed near room temperature suggesting dynamic magneto (resistance)-dielectric coupling.

Original languageEnglish (US)
Article number252902
JournalApplied Physics Letters
Volume97
Issue number25
DOIs
StatePublished - Dec 20 2010

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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