Comparison of structural and electric properties of PbZr0.2Ti0.8O3 and CoFe2O4/PbZr0.2Ti0.8O3 films on (100) LaAlO3
authors Zhang, XD; Dho, J; Park, S; Kwon, H; Hwang, J; Park, G; Kwon, D; Kim, B; Jin, Y; Kim, BG; Karpinsky, D; Kholkin, AL
nationality International
journal JOURNAL OF APPLIED PHYSICS
keywords FERROELECTRIC THIN-FILMS; MULTIFERROIC NANOSTRUCTURES; FATIGUE; THICKNESS; PROSPECTS; NETWORKS
abstract In this work, we investigated structural, electrical, and magnetic properties of ferroelectric PbZr0.2Ti0.8O3 (PZT) and ferrimagnetic/ferroelectric [CoFe2O4(CFO)/PZT] bilayers grown on (100)LaAlO3 (LAO) substrates supplied with bottom 50 nm thick LaNiO3 electrodes. Interestingly, structural and electrical properties of the PZT layer exhibited remarkable changes after the top-layer CFO deposition. X-ray diffraction data suggested that both the c- and a-domains exist in the PZT layer and the tetragonality of the PZT decreases upon the top-layer deposition. A variation in the electrical properties of the PZT layer upon the CFO deposition was investigated by polarization versus voltage (P-V), capacitance versus voltage (C-V), and capacitance versus frequency (C-f) measurements. The CFO deposition induced a slight decrease of the remnant polarization and more symmetric behavior of P-V loops as well as led to the improvement of fatigue behavior. The tentative origin of enhanced fatigue endurance is discussed based on the measurement results. These results were corroborated by local piezoelectric measurements. Ferrimagnetic property of the CFO/PZT bilayer was confirmed by magnetic measurement at room temperature. (C) 2011 American Institute of Physics. [doi:10.1063/1.3642977]
publisher AMER INST PHYSICS
issn 0021-8979
year published 2011
volume 110
issue 6
digital object identifier (doi) 10.1063/1.3642977
web of science category Physics, Applied
subject category Physics
unique article identifier WOS:000295619300118
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journal impact factor 2.286
5 year journal impact factor 2.138
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