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Ferroelectrics, 1994
Abstract Dielectric properties of relaxor ferroelectrics are characterized by giant and temperature-insensitive dielectric constants and large frequency dependence (dielectric relaxation), and therefore useful for high permittivity capacitors. Relaxor ferroelectrics also reveal superior characteristics in electrostriction and electrooptic effects ...
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Abstract Dielectric properties of relaxor ferroelectrics are characterized by giant and temperature-insensitive dielectric constants and large frequency dependence (dielectric relaxation), and therefore useful for high permittivity capacitors. Relaxor ferroelectrics also reveal superior characteristics in electrostriction and electrooptic effects ...
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Relaxing with relaxors: a review of relaxor ferroelectrics
Advances in Physics, 2011Relaxor ferroelectrics were discovered in the 1950s but many of their properties are not understood. In this review, we shall concentrate on materials such as PMN (PbMg1/3Nb2/3O3), which crystallize in the cubic perovskite structure but with the Mg ion, charge 2+, and the Nb ion, charge 5+, randomly distributed over the B site of the perovskite ...
R. A. Cowley +4 more
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Journal of Materials Science, 2006
To elucidate the molecular origin of the polarization dynamics in the ferroelectric relaxor poly(vinylidene fluoride—trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) terpolymer, a broadband dielectric study was carried out in the frequency range from 0.01 Hz to 10 MHz and temperatures from −150?C to 120?C for the terpolymer and a normal ...
Shihai Zhang +6 more
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To elucidate the molecular origin of the polarization dynamics in the ferroelectric relaxor poly(vinylidene fluoride—trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) terpolymer, a broadband dielectric study was carried out in the frequency range from 0.01 Hz to 10 MHz and temperatures from −150?C to 120?C for the terpolymer and a normal ...
Shihai Zhang +6 more
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Dielectric relaxor and ferroelectric relaxor: Bi-doped paraelectric SrTiO3
Journal of Applied Physics, 2002In this article, we report the evolution of the dielectric behavior from a dielectric relaxor to a ferroelectric relaxor with variation of Bi concentration in (Sr1−1.5xBix)TiO3 (0⩽x⩽0.2). In the doping range 0.0005⩽x⩽0.002, two dielectric modes A and B are induced.
Chen Ang, Zhi Yu
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Relaxor ferroelectrics with lanthanum perovskites
ISAF '92: Proceedings of the Eighth IEEE International Symposium on Applications of Ferroelectrics, 2003Lanthanum perovskite compounds La(B/sub 1/2//sup I/B/sub 1/2//sup II/)O/sub 3/ (B/sup I/=Ni,Co,Mg; B/sup II/=Ti) are studied as candidates for stabilizers to form perovskite-type Pb(Zn/sub 1/3/Nb/sub 2/3/)O/sub 3/ (PZN)-based ceramics. A conventional sintering technique is used to prepare ceramic samples with PZN-based solid solution. The ratios of the
T. Takenaka, T. Kanegae
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Relaxor ferroelectrics and related superglasses
Ferroelectrics, 2019AbstractMesoscopic ferroic glasses such as martensitic strain glass Ti50−x Ni50+x, magnetic cluster glass La0.7Ca0.3Mn0.7Cd0.3O3, and superdipolar relaxor PbMg1/3Nb2/3O3 (PMN) undergo glass transit...
Kleemann, Wolfgang, Dec, Jan
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Barkhausen noise in relaxor ferroelectrics
SPIE Proceedings, 2003Relaxor ferroelectrics form a diverse class of materials which typically show cooperative freezing into a nonergodic glassy state without long-range ferroelectric order. We discuss Barkhausen noise techniques in the non-ferroelectric regimes of the relaxors as a probe of the types of glassy order present.
Lambert K. Chao +2 more
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Dynamic response of relaxor ferroelectrics
Ferroelectrics, 2001Abstract A dynamic spherical random-bond—random-field (SR-BRF) model based on the coupled polar cluster picture is formulated. Assuming stochastic flips of the cluster polarization, the Langevin equations of motion are written down, from which the linear and nonlinear dynamic dielectric permittivities are derived.
R. Pirc, R. Blinc, V. Bobnar
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Dynamics in relaxor ferroelectric polymers
14th IEEE International Symposium on Applications of Ferroelectrics, 2004. ISAF-04. 2004, 2005Normal ferroelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] copolymer have been converted into relaxor ferroelectrics by introducing appropriate amount of defects into the original polar crystallites, which is achieved either by high-energy electron irradiation or by copolymerizing with a third bulky monomer 1,1-chlorofluoroethylene (
S.H. Zhang +7 more
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Tetragonal-structured PLZT relaxor ferroelectrics
Ferroelectrics, 1994Abstract Tetragonal La-modified lead zirconate titanate ceramics (PLZT) with a Zr/Ti ratio of 40/60 (x/40/60) with La contents (x) between 12 and 21 atomic% were prepared by the mixed oxide method and were subsequently characterized using dielectric spectroscopy.
Xunhu Dai, Dwight Viehland
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