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Title: Effect of (Bi, La)(Fe, Zn)O{sub 3} thickness on the microstructure and multiferroic properties of BiFeO{sub 3} thin films

Abstract

The effect of Bi{sub 0.90}La{sub 0.10}Fe{sub 0.90}Zn{sub 0.10}O{sub 3} (BLFZO) thicknesses on the microstructure and multiferroic properties of BiFeO{sub 3} (BFO) thin films was investigated, and all bilayered thin films were grown on Pt-coated silicon substrates without any buffer layers by a radio frequency sputtering. A (110) orientation is dominant in all the bilayers, and two grain growth modes are identified in these bilayers by using an atomic force microscope, where different grain growth modes significantly affect their leakage behavior. The dielectric constant ({epsilon}{sub r}) of bilayers gradually increases, and magnetic properties were deteriorated with the addition of BLFZO with a higher {epsilon}{sub r} and a weaker magnetic behavior. An enhanced ferroelectric behavior of 2P{sub r} {approx} 116.2 {mu}C/cm{sup 2} and 2E{sub c} {approx} 524 kV/cm could be observed in the BFO/BLFZO bilayered thin film with 80 nm BLFZO layer owing to a higher orientation degree of (110) and an interface coupling together with a lower leakage current density. As a result, electrical properties of BFO could be tailored by modifying the thicknesses of BLFZO.

Authors:
; ;  [1]
  1. Department of Materials Science, Sichuan University, Chengdu 610064 (China)
Publication Date:
OSTI Identifier:
22089572
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 112; Journal Issue: 9; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ATOMIC FORCE MICROSCOPY; BISMUTH COMPOUNDS; CURRENT DENSITY; FERRITES; FERROELECTRIC MATERIALS; INTERFACES; IRON COMPOUNDS; LANTHANUM COMPOUNDS; LAYERS; LEAKAGE CURRENT; MAGNETIC PROPERTIES; MICROSTRUCTURE; ORIENTATION; OXYGEN COMPOUNDS; SUBSTRATES; THICKNESS; THIN FILMS; ZINC COMPOUNDS

Citation Formats

Wu Jiagang, Xiao Dingquan, and Zhu Jianguo. Effect of (Bi, La)(Fe, Zn)O{sub 3} thickness on the microstructure and multiferroic properties of BiFeO{sub 3} thin films. United States: N. p., 2012. Web. doi:10.1063/1.4764340.
Wu Jiagang, Xiao Dingquan, & Zhu Jianguo. Effect of (Bi, La)(Fe, Zn)O{sub 3} thickness on the microstructure and multiferroic properties of BiFeO{sub 3} thin films. United States. doi:10.1063/1.4764340.
Wu Jiagang, Xiao Dingquan, and Zhu Jianguo. Thu . "Effect of (Bi, La)(Fe, Zn)O{sub 3} thickness on the microstructure and multiferroic properties of BiFeO{sub 3} thin films". United States. doi:10.1063/1.4764340.
@article{osti_22089572,
title = {Effect of (Bi, La)(Fe, Zn)O{sub 3} thickness on the microstructure and multiferroic properties of BiFeO{sub 3} thin films},
author = {Wu Jiagang and Xiao Dingquan and Zhu Jianguo},
abstractNote = {The effect of Bi{sub 0.90}La{sub 0.10}Fe{sub 0.90}Zn{sub 0.10}O{sub 3} (BLFZO) thicknesses on the microstructure and multiferroic properties of BiFeO{sub 3} (BFO) thin films was investigated, and all bilayered thin films were grown on Pt-coated silicon substrates without any buffer layers by a radio frequency sputtering. A (110) orientation is dominant in all the bilayers, and two grain growth modes are identified in these bilayers by using an atomic force microscope, where different grain growth modes significantly affect their leakage behavior. The dielectric constant ({epsilon}{sub r}) of bilayers gradually increases, and magnetic properties were deteriorated with the addition of BLFZO with a higher {epsilon}{sub r} and a weaker magnetic behavior. An enhanced ferroelectric behavior of 2P{sub r} {approx} 116.2 {mu}C/cm{sup 2} and 2E{sub c} {approx} 524 kV/cm could be observed in the BFO/BLFZO bilayered thin film with 80 nm BLFZO layer owing to a higher orientation degree of (110) and an interface coupling together with a lower leakage current density. As a result, electrical properties of BFO could be tailored by modifying the thicknesses of BLFZO.},
doi = {10.1063/1.4764340},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 9,
volume = 112,
place = {United States},
year = {2012},
month = {11}
}