Jump to main content
Jump to site search


Dynamic characteristics of defect dipoles in Mn-doped 0.24Pb(In1/2Nb1/2)O3–0.47Pb(Mg1/3Nb2/3)O3–0.29PbTiO3 single crystal

Author affiliations

Abstract

The dynamic ferroelectric hysteresis loops with internal bias field were investigated in poled and aged Mn-doped 0.24Pb(In1/2Nb1/2)O3–0.47Pb(Mg1/3Nb2/3)O3–0.29PbTiO3 single crystal. Below the normal-relaxor transition temperature Tnr, asymmetric hysteresis loops along the electric field axis were observed at high frequencies, whereas normal square-like loops were found at low frequencies (<0.1 Hz). When T > Tnr, slim PE loops appear and the macroscopic ferroelectric properties disappear due to the presence of polar nanoregions (PNRs). The strong temperature and frequency dependence of the internal bias field is believed to be correlated with the defect dipole reorientation induced by both the electric field and thermal activation. Intriguingly, polynomial scaling relations with temperature T and stretched exponential time t (reciprocal of frequency) were established for the internal bias field in the form of Ei(T) = AT2 + BT + C and Ei(t) = Ei0 exp[−(t/τ)n] below the rhombohedral–tetragonal transition temperature (TR–T). These results provide a deeper understanding on the movement mechanisms of defect dipoles in acceptor-doped ferroelectrics.

Graphical abstract: Dynamic characteristics of defect dipoles in Mn-doped 0.24Pb(In1/2Nb1/2)O3–0.47Pb(Mg1/3Nb2/3)O3–0.29PbTiO3 single crystal

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Nov 2018, accepted on 30 Nov 2018 and first published on 03 Dec 2018


Article type: Paper
DOI: 10.1039/C8CE01913D
Citation: CrystEngComm, 2019, Advance Article
  •   Request permissions

    Dynamic characteristics of defect dipoles in Mn-doped 0.24Pb(In1/2Nb1/2)O3–0.47Pb(Mg1/3Nb2/3)O3–0.29PbTiO3 single crystal

    X. Qi, E. Sun, W. Lü, S. Li, B. Yang, R. Zhang and W. Cao, CrystEngComm, 2019, Advance Article , DOI: 10.1039/C8CE01913D

Search articles by author

Spotlight

Advertisements