Results 171 to 180 of about 1,179 (218)
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Ferroelectrics, 2000
Abstract Relaxor properties of Sr0.61-xBa0.39Nb2O6:Cex 3+ (SBN61:Ce) are examined by dielectric spectroscopy, linear birefringence (LB) and optical second harmonic generation (SHG) as a function of frequency and temperature before and after poling.
P. Lehnen +4 more
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Abstract Relaxor properties of Sr0.61-xBa0.39Nb2O6:Cex 3+ (SBN61:Ce) are examined by dielectric spectroscopy, linear birefringence (LB) and optical second harmonic generation (SHG) as a function of frequency and temperature before and after poling.
P. Lehnen +4 more
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Ferroelectrics, 2019
The simple stochastic model of temperature diffusing of the phase transition is presented, which takes into account the structural disorder of the material by introducing a random function – the ph...
V. N. Nechaev, A. V. Shuba
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The simple stochastic model of temperature diffusing of the phase transition is presented, which takes into account the structural disorder of the material by introducing a random function – the ph...
V. N. Nechaev, A. V. Shuba
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Relaxor ferroelectric polymers
ISAF 1998. Proceedings of the Eleventh IEEE International Symposium on Applications of Ferroelectrics (Cat. No.98CH36245), 2002An exceptionally high electrostrictive response was observed in electron irradiated polyvinylidene fluoride-trifluoroethylene (P(VDF-TrFE)) copolymer. Moreover, the transverse strain of the material can be tuned over a large range by different sample treatment conditions.
Q.M. Zhang +3 more
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The Order Parameter in Relaxors
Integrated Ferroelectrics, 2003A lamellar structure consisted of dielectric and ferroelectric slabs is considered within the continuous media theory. It is shown that, at the ferroelectric phase transition, in the ferroelectric slabs, there appears an alternating domain structure which resembles the structure studied earlier in a ferroelectric thin film with dead layers and in a ...
S. A. Prosandeev +3 more
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Applied Physics Letters, 2000
BaTiO 3 shows relaxation effects when minute concentrations of Bi+3 and Fe+3 are added in varying molar ratios. Addition of Bi+3 at the A site reduces the transition maximum (Tm), whereas Fe+3 addition at the B site reduces the value of dielectric constant.
M. Mahesh Kumar +2 more
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BaTiO 3 shows relaxation effects when minute concentrations of Bi+3 and Fe+3 are added in varying molar ratios. Addition of Bi+3 at the A site reduces the transition maximum (Tm), whereas Fe+3 addition at the B site reduces the value of dielectric constant.
M. Mahesh Kumar +2 more
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Relaxor ferroelectric materials
IEEE Symposium on Ultrasonics, 2002The authors review relaxor ferroelectrics and associated phenomena. It is noted that the anomalously large dielectric constants (K) of relaxor ferroelectrics make them ideal for multilayer capacitors, electrostrictive actuators, and E-field-induced piezoelectrics for low-frequency sonar and high-frequency biomedical transducers.
T.R. Shrout, J. Fielding
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2008
So-called ferroelectric materials may be divided into two classes: ferroelectrics and relaxors (Table 30.1) [1].
Simon, Annie, Ravez, Jean
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So-called ferroelectric materials may be divided into two classes: ferroelectrics and relaxors (Table 30.1) [1].
Simon, Annie, Ravez, Jean
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2016 IEEE International Conference on Dielectrics (ICD), 2016
AbstractThe transition from a ferroelectric to a relaxor is described. Asymmetric double-well potentials for fluctuating charges, dipoles or polar nanoregions and a feedback between these double we...
Andreas Leschhorn, Herbert Kliem
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AbstractThe transition from a ferroelectric to a relaxor is described. Asymmetric double-well potentials for fluctuating charges, dipoles or polar nanoregions and a feedback between these double we...
Andreas Leschhorn, Herbert Kliem
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Relaxor ferroelectric transducers
IEEE Symposium on Ultrasonics, 2002Novel ultrasonic transducers whose sensitivity can be controlled with a DC bias field have been developed by utilizing relaxor ferroelectrics as a transducer material in place of conventional piezoelectrics. Relaxor ferroelectrics have a large bias-field-induced piezoelectricity as well as a giant electrostrictive effect due to their extremely large ...
H. Takeuchi +3 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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