Relaxor behaviour of (1 −x) [0.7PbZrO3–0.3(K0.5Bi0.5)TiO3]–xSrTiO3solid solutions

Коротков, Л. Н.; Гриднев, С. А.; Rogova, S. P.; Pavlova, N. G.; Belousov, M. A.

doi:10.1088/0022-3727/38/19/021

Cited by 7 publications

(1 citation statement)

References 27 publications

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“…It should be noted that the temperature dependence of the dipolar glass order parameter q can also be extracted from the experimental ϵ ( T ) curve by using the following relationship :

q (T) = 1 - \frac{T ϵ (T)}{C_{CW} + J_{normalo} ϵ (T)} .

…”

Section: Resultsmentioning

confidence: 99%

Elastic and anelastic properties of the 0.55SrTiO₃–0.45BiScO₃ ceramics characteristic for relaxor ferroelectric behavior

Ivanov

Danshina

2013

Physica Status Solidi (b)

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The low‐frequency elastic and anelastic properties of the ceramic 0.55SrTiO3–0.45BiScO3 sample have been studied. Anomalous changes of the Young's modulus and the internal friction characteristic for the ferroelectric relaxors were observed at cooling below the Burns temperature at ∼585 K. The relaxor properties of this system are confirmed by dielectric measurements and attributed to the coexistence of the polar tetragonal P4mm phase and the nonpolar cubic Pm3m phase. Elastic anomaly is assumed to be due to electrostriction relationship between spontaneous polarization of polar tetragonal domains and strain of the sample. Using the special internal friction mechanism for the first order phase transition, the size of the polar phase nuclei arising at the Burns temperature was estimated to be equal to ∼20 nm.

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“…It should be noted that the temperature dependence of the dipolar glass order parameter q can also be extracted from the experimental ϵ ( T ) curve by using the following relationship :

q (T) = 1 - \frac{T ϵ (T)}{C_{CW} + J_{normalo} ϵ (T)} .

…”

Section: Resultsmentioning

confidence: 99%

Elastic and anelastic properties of the 0.55SrTiO₃–0.45BiScO₃ ceramics characteristic for relaxor ferroelectric behavior

Ivanov

Danshina

2013

Physica Status Solidi (b)

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FeTiTaO₆: A Lead‐Free Relaxor Ferroelectric Based on the Rutile Structure

et al. 2008

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Several materials properties of rutile TiO 2 (together with its other polymorphs) have been widely investigated in view of both fundamental and practical interest. It is a wide band gap (E g ¼ 3.05 eV) semiconductor that finds application, among others, as a photocatalyst for splitting water [1] into H 2 and O 2 and remediation of organic pollutants. [2] Among the lesswell-known properties of TiO 2 is its abnormally large static dielectric permittivity that shows strong frequency dependence as well as the associated soft A 2u mode that decreases with decreasing temperature. [3,4] The latter, however, never becomes completely soft, even at 0 K. Accordingly, rutile is classified as an incipient ferroelectric. We prepared M 0 TiTaO 6 (M 0 ¼ Al, Cr, Fe) oxides by conventional solid-state synthesis starting from pure binary oxides. Powder X-ray diffraction (XRD) showed formation of rutile structure for all three M 0 TiTaO 6 compounds. All the reflections in the patterns (Fig. 1) could be indexed to the tetragonal rutile structure. The structural parameters derived from Rietveld refinement of the powder XRD data are given in Table 1. We see that while the c/a ratio remains nearly the same as in the parent rutile TiO 2 , the a and c parameters of M 0 TiTaO 6 show variations that are consistent with the average ionic radii of the metal atoms. We find that the average M-O distances in FeTiTaO 6 are slightly larger than those in rutile, consisting of 4 short and 2 long M-O bonds (elongated MO 6 octahedron); curiously, for M 0 ¼ Al and Cr oxides we find 4 long and 2 short M-O bonds (compressed MO 6 octahedron).We have recorded neutron diffraction (ND) patterns of M 0 ¼ Cr, Fe at T ¼ 300, 150, and 12 K, in an attempt to characterize further the structure of these oxides. We see no evidence for a long-range magnetic ordering down to 12 K in

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Perovskite ferroelectric nanomaterials

2013

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In this review, the main concept of ferroelectricity of perovskite oxides and related materials at nanometer scale and existing difficulties in the synthesis of those nanocrystals are discussed. Important effects, such as depolarization field and size effect, on the existence of ferroelectricity in perovskite nanocrystals are deliberated. In the discussion of modeling works, different theoretical calculations are pinpointed focusing on their studies of lattice dynamics, phase transitions, new origin of ferroelectricity in nanostructures, etc. As the major part of this review, recent research progress in the facile synthesis, characterization and various applications of perovskite ferroelectric nanomaterials, such as BaTiO₃, PbTiO₃, PbZrO₃, and BiFeO₃, are also scrutinized. Perspectives concerning the future direction of ferroelectric nanomaterials research and its potential applications in renewable energy, etc., are presented. This review provides an overview in this area and guidance for further studies in perovskite ferroelectric nanomaterials and their applications.

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Relaxor behaviour of (1 −x) [0.7PbZrO₃–0.3(K_0.5Bi_0.5)TiO₃]–xSrTiO₃solid solutions

Cited by 7 publications

References 27 publications

Elastic and anelastic properties of the 0.55SrTiO₃–0.45BiScO₃ ceramics characteristic for relaxor ferroelectric behavior

Elastic and anelastic properties of the 0.55SrTiO₃–0.45BiScO₃ ceramics characteristic for relaxor ferroelectric behavior

FeTiTaO₆: A Lead‐Free Relaxor Ferroelectric Based on the Rutile Structure

Perovskite ferroelectric nanomaterials

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Relaxor behaviour of (1 −x) [0.7PbZrO3–0.3(K0.5Bi0.5)TiO3]–xSrTiO3solid solutions

Cited by 7 publications

References 27 publications

Elastic and anelastic properties of the 0.55SrTiO3–0.45BiScO3 ceramics characteristic for relaxor ferroelectric behavior

Elastic and anelastic properties of the 0.55SrTiO3–0.45BiScO3 ceramics characteristic for relaxor ferroelectric behavior

FeTiTaO6: A Lead‐Free Relaxor Ferroelectric Based on the Rutile Structure

Perovskite ferroelectric nanomaterials

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Relaxor behaviour of (1 −x) [0.7PbZrO₃–0.3(K_0.5Bi_0.5)TiO₃]–xSrTiO₃solid solutions

Elastic and anelastic properties of the 0.55SrTiO₃–0.45BiScO₃ ceramics characteristic for relaxor ferroelectric behavior

Elastic and anelastic properties of the 0.55SrTiO₃–0.45BiScO₃ ceramics characteristic for relaxor ferroelectric behavior

FeTiTaO₆: A Lead‐Free Relaxor Ferroelectric Based on the Rutile Structure