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Nanostructural-property relations in complex lead perovskites
Clive A. Randall,Amar S. Bhalla +1 more
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In this paper, a correlation between the nanoscale B-site order and relaxor on glassy ferroelectric behavior is found in these lead perovskites, and a hypothesis is suggested which relates 0-3 polar connectivity to order-disorder connectivity.Abstract:
From transmission electron microscopy studies on several complex lead perovskite compounds Pb(B'B'')O3, and their solid solutions a classification can be obtained based on B-cation order. This classification divides the complex lead perovskites into three subgroups; random occupation or disordered, nanoscale or short coherent long-range order and long coherent long-range order of B-site cations. A correlation between the nanoscale B-site order and relaxor on glassy ferroelectric behavior is found in these lead perovskites. An hypothesis is suggested which relates 0-3 polar connectivity to 0-3 order-disorder connectivity. This hypothesis is discussed with relation to present theories [G. A. Smolenskii: J. Phys. Soc. Jpn. (1970) Suppl., p. 26, L. E. Cross: Ferroelectrics 76 (1987) 241, T. L. Renieke and K. L. Ngai: Solid State Commun. 18 (1973) 1543] and reported experimental results of the perovskite relaxor ferroelectrics.read more
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Journal ArticleDOI
Average and Local Structure of (1−x)BaTiO3−xLaYO3 (0≤x≤0.50) Ceramics
TL;DR: In this paper, phase purity and crystal structure of LBTY ceramics were investigated using a combination of X-ray diffraction (XRD), electron diffraction, and Raman spectroscopy.
Journal ArticleDOI
Compositional disorder, polar nanoregions and dipole dynamics in Pb(Mg1/3Nb2/3)O3-based relaxor ferroelectrics
Alexei A. Bokov,Brian J. Rodriguez,Xiaohui Zhao,Jae-Hyeon Ko,Stephen Jesse,Xifa Long,Weiguo Qu,Tae Hyun Kim,John D. Budai,Anna N. Morozovska,Seiji Kojima,Xiaoli Tan,Sergei V. Kalinin,Zuo-Guang Ye +13 more
TL;DR: In this article, the authors analyzed and discussed the results of their recent inves- tigations of the morphology of CORs and the dynamics of PNRs in Pb(Mg1/3Nb2/3)O3-based solid solutions in which the degree of compositional disorder was varied by means of changing the composition and/or by using high-tem perature annealing.
Journal ArticleDOI
Diffuse scattering in Pb(Zn1/3Nb2/3)O3 with 8% PbTiO3 by quasi-elastic neutron scattering
TL;DR: In this paper, the anisotropy of diffuse scattering due to polar nanoregions in perovskite relaxor ferroelectric Pb(Zm1/3Nb2/3)O3 with 8% PbTiO3 was investigated by cold neutron scattering with high energy resolution (8 GHz).
Journal ArticleDOI
Experimental evidence for a spontaneous relaxor to ferroelectric phase transition in Pb(Mg13Nb23)O3 - 10% Ti
TL;DR: In this paper, the influence of titanium on Pb(Mg 1 3 Nb 2 3 )O 3 based ceramics is discussed, and it is shown that a 0.9 PbTiO3 ceramic undergoes a zero-field rhombohedral phase transition.
Journal ArticleDOI
Microstructures of the monomorph piezoelectric ceramic actuators with functional gradients
TL;DR: In this paper, a monolithic ceramic actuator with a gradient of piezoelectric activity across its thickness is introduced, which is fabricated by interdiffusion between a high piezolectric and dielectric compositions, and an interface between the rhombohedral and pseudocubic phases is found to exist in the inter-diffusion layer by TEM observations and selected area electron diffraction (SAED) patterns.
References
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Incommensurate structures in highly ordered complex perovskites Pb(Co1/2W1/2)O3 and Pb(Sc1/2Ta1/2)O3.
TL;DR: Evidence for an incommensurate phase within the antiferroelectric and ferroelectric phase, respectively is revealed and a possible ``lock-in'' transition is found in Pb (${\mathrm{Sc}}_{1/2}$) and Pb (£3), but the incommonsurate to commensurate transition seems to be dependent on the degree of B-site order.
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