Double hysteresis loop induced by defect dipoles in ferroelectric Pb(Zr{sub 0.8}Ti{sub 0.2})O{sub 3} thin films

Journal Article · Tue Feb 15 00:00:00 EST 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3549116· OSTI ID:21538101

Yunti, Pu; Jiliang, Zhu; Xiaohong, Zhu; Yuansheng, Luo; Mingsong, Wang; Xuhai, Li; Jing, Liu; Jianguo, Zhu; Dingquan, Xiao ^[1]

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1. Department of Materials Science, Sichuan University, Chengdu 610064 (China)

Pb(Zr{sub 0.8}Ti{sub 0.2})O{sub 3} (PZT80/20) thin films were deposited on the Pt(111)/Ti/SiO{sub 2}/Si(100) substrates by RF magnetron sputtering. Mainly perovskite crystalline phase with highly (202)-preferred orientation, determined by x-ray diffraction, was formed in the lead zirconate titanate (PZT)(80/20) thin films. Polarization measurements of the unannealed and aged films showed a clear double hysteresis loop. However, the double hysteresis loop phenomenon was greatly suppressed in the PZT thin films annealed under pure oxygen, and thus they exhibited larger remnant polarization (P{sub r} = 6.3 {mu}C/cm{sup 2}). The related mechanism for the appearance of constricted and double hysteresis loops was investigated to be associated with the realignment and disassociation of defect dipoles via oxygen octahedral rotations or oxygen vacancy diffusion. The butterfly-shaped C-V characteristic curve with a valley gave further evidence for double hysteresis loop characteristic in the unannealed and aged PZT thin films.

• OSTI ID: 21538101
• Journal Information: Journal of Applied Physics, Vol. 109, Issue 4; Other Information: DOI: 10.1063/1.3549116; (c) 2011 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
CRYSTAL DEFECTS
CRYSTALS
DEPOSITION
DIFFUSION
DIPOLES
EROSION
FERROELECTRIC MATERIALS
GRAIN ORIENTATION
HYSTERESIS
MAGNETRONS
OXYGEN
PEROVSKITE
POLARIZATION
PZT
SILICON OXIDES
SPUTTERING
SUBSTRATES
THIN FILMS
X-RAY DIFFRACTION
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIELECTRIC MATERIALS
DIFFRACTION
ELECTRON TUBES
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FILMS
HEAT TREATMENTS
LEAD COMPOUNDS
MATERIALS
MICROSTRUCTURE
MICROWAVE EQUIPMENT
MICROWAVE TUBES
MINERALS
MULTIPOLES
NONMETALS
ORIENTATION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
SCATTERING
SILICON COMPOUNDS
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONATES
ZIRCONIUM COMPOUNDS