Effect of Eu3+ doping on curie temperature and fatigue properties of Pb,La(ZrTi)O3 films

Publication date: 30 November 2017
Source:Thin Solid Films, Volume 642
Author(s): Antony Jeyaseelan A., Dinesh Rangappa, Soma Dutta

Pb0·92(La1−yEuy)0·08(Zr0·52Ti0·48)0.98O3 (PLEZT) films were prepared with varying Eu³⁺ concentrations (y=0.0, 0.3, 0.5 and 0.7) to study the doping effect on crystal structure and ferroelectric properties. The XRD results confirmed the formation of tetragonal perovskite structure in PLEZT with gradual increase in (110) peak intensity. The residual stress value calculated for PLZT film was (+)0.751GPa which reduces to (+)0.387GPa with increasing Eu³⁺ concentration. The influence of Eu³⁺ doping concentration on ferroelectric switching behaviour was investigated by observing the remanent polarization, spontaneous polarization and displacement current. The remanent polarization (Pr) in PLZT film increased from 8.9μC/cm² to 13.3μC/cm² with Eu³⁺ concentration which is expected due to the increase in tetragonality factor and reduction in dipolar defects in PLEZT films. A strong residual stress dependent ferroelectric properties and phase transition temperature was observed in PLZT films with Eu³⁺ doping. The improved fatigue resistance observed in Eu³⁺ doped PLZT may be due to the suppression of oxygen ion vacancy.

Effect of Eu3+ doping on curie temperature and fatigue properties of Pb,La(ZrTi)O3 films

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