Journal ArticleDOI
Phenomenological description of the diffuse phase transition in ferroelectrics
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TLDR
In this paper, a new empirical equation for a phenomenological description of the temperature dependence of the dielectric permittivity (e') peak is proposed, which provides an excellent fitting of the experimental curves at temperatures into and above the dispersion region, enabling us to calculate some characteristic parameters of the phase transitions in ferroelectric materials.Abstract:
Features of the diffuse phase transition in lead magnesium niobate and strontium barium niobate, typical relaxor ferroelectric materials, were studied as a function of temperature and frequency. A new empirical equation for a phenomenological description of the temperature dependence of the dielectric permittivity (e') peak is proposed. In fact, the proposed equation provides an excellent fitting of the experimental curves at temperatures into and above the dielectric dispersion region, enabling us to calculate some characteristic parameters of the phase transitions in ferroelectric materials.read more
Citations
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Journal ArticleDOI
Lead-Free Relaxor Ferroelectrics
TL;DR: In this paper, the authors outline how lead-free relaxors can offer a route to an environmentally safer option in this outstanding material class and discuss properties of uniaxial, planar, and volumetric relaxor compositions.
Journal ArticleDOI
Dielectric relaxation in relaxor ferroelectrics
TL;DR: In this paper, a comprehensive definition of relaxors is proposed: relaxors are defined as ferroelectrics in which the maximum in the temperature dependence of static susceptibility occurs within the temperature range of dielectric relaxation, but does not coincide with the temperature of singularity of relaxation time or soft mode frequency.
Journal ArticleDOI
Empirical scaling of the dielectric permittivity peak in relaxor ferroelectrics
Alexei A. Bokov,Y. Bing,W. Chen,Zuo-Guang Ye,S. A. Bogatina,I. P. Raevski,S. I. Raevskaya,E. V. Sahkar +7 more
TL;DR: In this paper, it was shown that the data taken from the high-temperature slopes of diffused permittivity peaks of all the materials studied can be collapsed onto a single scaling line derived from the formula.
Journal ArticleDOI
Structure and electrical properties of (1 − x)Bi0.5Na0.5TiO3–xBi0.5K0.5TiO3 ceramics near morphotropic phase boundary
TL;DR: In this article, the binary lead-free piezoelectric ceramics with the composition of (1 − ǫ x )Bi 0.5 K 0.3 Na 0.4 O 3, x Bi 0.1 O 3 O 4, x 0.20 O 4 O 3 were synthesized by conventional mixed-oxide method.
Journal ArticleDOI
Diffuse phase transition in BaTi1−xSnxO3 ceramics: An intermediate state between ferroelectric and relaxor behavior
TL;DR: In this paper, a transition regime between normal ferroelectric and relaxor behaviors is encountered in BaTi1−xSnxO3 ceramics, x=0.10−0.20, by means of dielectric spectroscopy and piezoresponse force microscopy.
References
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Journal ArticleDOI
Random-Field Instability of the Ordered State of Continuous Symmetry
Yoseph Imry,Shang-keng Ma +1 more
TL;DR: In this article, it was shown that when the order parameter has a continuous symmetry, the ordered state is unstable against an arbitrarily weak random field in less than four dimensions and the borderline dimensionality above which mean-field-theory results hold is six.
Book
Ferroelectric materials and their applications
TL;DR: Ferroelectric tungsten - bronze type niobate crystals as discussed by the authors is a type of ferroelectric crystal material that can be used to construct piezoelectric composites.
Journal ArticleDOI
Fabrication of perovskite lead magnesium niobate
S. L. Swartz,Thomas R. Shrout +1 more
TL;DR: The perovskite relaxor ferroelectric lead magnesium niobate (PbMg 1 3 Nb 2 3 O 3 ) is an important material because of its high dielectric constant and correspondingly large electrostrictive strains as mentioned in this paper.
Journal ArticleDOI
Deviation from Curie-Weiss behavior in relaxor ferroelectrics.
TL;DR: It is proposed that this deviation arises due to short-range correlations between polar regions, and that these correlations at high temperatures are the precursor to a freezing of the polarization fluctuations into a glassy state.
Journal ArticleDOI
Relaxation polarization of PbMg 1/3Nb2/3O3(PMN)-A ferroelectric with a diffused phase transition
V. V. Kirillov,V. A. Isupov +1 more
TL;DR: In this article, a model has been proposed, in accordance with which the features of the dielectric properties PMN are explained by the relaxation of the polar regions surrounded with a non polar phase, with the number of relaxing regions dependent on temperature.
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