Fabrication and characterization of micropillar-type multiferroic composite thin films by non-aqueous sol-gel method using ferroelectric pillars

CoFe2O4 (CFO) thin films were deposited on (Bi3.25Nd0.65Eu0.10)Ti3O12 (BNEuT) micropillar films by a non-aqueous sol-gel method. The pitch size of 2-5 m in the micropillar films used as ferroelectric pillars, and 5 and 15 CFO deposition cycles were examined for high density of CFO nanoparticles. All...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2020-02, Vol.59 (SC), p.SCCB08
Main Authors: Ito, Ryoga, Kobune, Masafumi, Yoshii, Masamitsu, Ito, Ryo, Haruna, Yusuke, Obayashi, Taiki, Migita, Tsubasa, Kikuchi, Takeyuki, Kanda, Kensuke, Maenaka, Kazusuke
Format: Article
Language:English
Subjects:
Cobalt ferrites
Density
Deposition
Ferroelectric materials
Ferroelectricity
Nanoparticles
Sol-gel processes
Thin films
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Summary:CoFe2O4 (CFO) thin films were deposited on (Bi3.25Nd0.65Eu0.10)Ti3O12 (BNEuT) micropillar films by a non-aqueous sol-gel method. The pitch size of 2-5 m in the micropillar films used as ferroelectric pillars, and 5 and 15 CFO deposition cycles were examined for high density of CFO nanoparticles. All the CFO films formed by five deposition cycles on BNEuT micropillar films with a pitch size of 2-5 m were composed of mostly single-phase CFO with a cubic inverse-spinel structure. All the CFO films deposited on the four BNEuT micropillar films were highly dense and had excellent surface flatness, based on surface field-emission scanning electron microscope observations. Based on the structural, magnetic and ferroelectric characteristics, the optimal pitch size for achieving a high density of CFO nanoparticles was 5 m, and the optimal number of CFO deposition cycles was five.
ISSN:0021-4922
1347-4065
DOI:10.7567/1347-4065/ab4aa1