Local strain heterogeneity and elastic relaxation dynamics associated with relaxor behavior in the single-crystal perovskite Pb(I n1/2 N b1/2) O3-PbZr O3-Pb(M g1/3 N b2/3) O3-PbTi O3

He, W and Carpenter, M. A. and Lampronti, G. I. and Li, Q and Yan, Q (2017) Local strain heterogeneity and elastic relaxation dynamics associated with relaxor behavior in the single-crystal perovskite Pb(I n1/2 N b1/2) O3-PbZr O3-Pb(M g1/3 N b2/3) O3-PbTi O3. Physical Review B, 96 (14). p. 144109. ISSN 1098-0121, ESSN: 1550-235X DOI https://doi.org/10.1103/PhysRevB.96.144109

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Official URL: https://journals.aps.org/prb/abstract/10.1103/Phys...

Abstract

© 2017 American Physical Society. Recently, Pb(In1/2Nb1/2)O3-PbZrO3-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PIN-PZ-PMN-PT) relaxor single crystals were demonstrated to possess improved temperature-insensitive properties, which would be desirable for high-power device applications. The relaxor character associated with the development of local random fields (RFs) and a high rhombohedral-tetragonal (R-T) ferroelectric transition temperature (TR-T > 120°C) would be critical for the excellent properties. A significant effect of the chemical substitution of In3+ and Zr4+ in PMN-PT to give PIN-PZ-PMN-PT is the development of local strain heterogeneity, which acts to suppress the development of macroscopic shear strains without suppressing the development of local ferroelectric moments and contribute substantially to the RFs in PIN-PZ-PMN-PT. Measurements of elastic and anelastic properties by resonant ultrasound spectroscopy show that PIN-PZ-PMN-PT crystal has a quite different form of elastic anomaly due to Vogel-Fulcher freezing, rather than the a discrete cubic-T transition seen in a single crystal of PMN-28PT. It also has high acoustic loss of the relaxor phase down to TR-T. Analysis of piezoresponse force microscopy phase images at different temperatures provides a quantitative insight into the extent to which the RFs influence the microdomain structure and the short-range order correlation length (ξ).

Item Type: Article
Uncontrolled Keywords: 2018AREP; IA72
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
08 - Green Open Access
Journal or Publication Title: Physical Review B
Volume: 96
Page Range: p. 144109
Identification Number: https://doi.org/10.1103/PhysRevB.96.144109
Depositing User: Sarah Humbert
Date Deposited: 03 Jul 2018 16:50
Last Modified: 03 Jul 2018 16:51
URI: http://eprints.esc.cam.ac.uk/id/eprint/4267

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