Phase transitions and electric properties of Pb2InNbO6and Pb2ScNbO6crystals with differing degree of ion ordering in the sites of the crystalline lattice

Bokov, Alexei A.; Raevski, I. P.; Prokopalo, O. I.; Fesenko, E. G.; Smotrakov, V. G.

doi:10.1080/00150198408215860

Cited by 42 publications

(6 citation statements)

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“…In other words, the OF sample shows a more diffuse phase transition as compared with the quenched sample. In the case of Pb-based relaxor materials such as Pb(Sc, Ta)O 3 (PST), 28) Pb(In, Nb)O 3 (PIN), 29) etc., the compositional order-disorder may greatly affect the dielectric and ferroelectric properties. For example, Setter and Cross 28) demonstrated that the degree of B-site order in PST can be controlled by heat treatment.…”

mentioning

confidence: 99%

Correlation between depolarization temperature and lattice distortion in quenched (Bi_1/2Na_1/2)TiO₃-based ceramics

Nagata

Takagi

Yoneda

et al. 2020

Appl. Phys. Express

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(Bi1/2Na1/2)TiO3 (BNT) is one of the candidates for lead-free piezoelectric ceramics. Recently, we found that the depolarization temperature T d of BNT could be increased by approximately 40 °C–80 °C with a quenching treatment after the sintering. To elucidate the mechanism, high-energy synchrotron X-ray powder diffraction data were collected in SPring-8 to analyze their crystal structures in detail. In the case of a quenched BNT-based sample, Bi ions displaced more to the off-center position of the A-site in a perovskite structure with a more ordered structure. The increase in rhombohedral distortion then affects the T d elevation in the quenched sample.

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mentioning

confidence: 99%

Correlation between depolarization temperature and lattice distortion in quenched (Bi_1/2Na_1/2)TiO₃-based ceramics

Nagata

Takagi

Yoneda

et al. 2020

Appl. Phys. Express

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“…At temperatures above 440 K the relative loss shoots up beyond the range of measurement. The dielectric transition at 440 K is broad and therefore may be termed as a diffused phase transition (DPT) [14,15]. Its Curie-Wiess exponent/diffusivity (ν) [16] in the post transition region is greater than 3, which is a characteristic of underdeveloped domains [17].…”

Section: Dielectric Constant Andmentioning

confidence: 99%

Dielectric Characterization of Ba(Fe_1/3Nb_2/3)O₃Perovskite

Salvi¹,

Ranade²,

Khandpekar³

2005

Ferroelectrics

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Ba(Fe 1/3 Nb 2/3 )O 3 has been prepared by well established ceramic technique at 1100 • C. It exists in disordered cubic phase with tetragonal superlattice structure. It exhibits single relaxation frequency at 533 KHz. The relaxation spectra imply the presence of interfacial polarization. The dielectric constant and relative loss have been determined as a function of temperature. It shows a diffused phase transition at 440 K. The measurements of Schottky barrier, bandgap and resistivity have also been carried out. On the basis of the observations the presence of dielectric microdomains is interpreted. The, observations are compared with Ba(Fe 1/2 Nb 1/2 )O 3 .

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“…This ordering degree averaged over the volume of the crystal is an essential parameter that affects their physical properties and, in particular, the character and the temperatures of structural and magnetic phase transitions occurring in them (Isupov, 2003;Sakhnenko & Ter-Oganesyan, 2003;Sakhnenko & Ter-Oganessian, 2005). As typical examples of pronounced influence of cationic order on the physical properties of perovskites one can cite PbSc 1/2 Nb 1/2 O 3 , PbSc 1/2 Ta 1/2 O 3 , PbIn 1/2 Nb 1/2 O 3 and PbYb 1/2 Nb 1/2 O 3 , which show qualitatively different dielectric properties of ordered and disordered samples (Zhu et al, 2008;Chu et al, 1995Chu et al, , 1993Bokov et al, 1984Bokov et al, , 1993Ohwada et al, 2008), and SrFe 1/2 Mo 1/2 O 3 , whose magnetic properties strongly depend on the ordering degree of Fe and Mo cations (Sarma et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Theory of order–disorder phase transitions of B-cations in AB′_1/2 B′′_1/2O₃ perovskites

Sakhnenko

Ter-Oganessian

2018

Acta Crystallogr Sect B

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Perovskite-like oxides AB'B''O with two different cations in the B-sublattice may experience cation order-disorder phase transitions. In many cases the degree of cation ordering can be varied by suitable synthesis conditions or subsequent sample treatment, which has a fundamental impact on the physical properties of such compounds. Therefore, understanding the mechanism of cation order-disorder phase transition and estimation of the phase transition temperature is of paramount importance for tuning of properties of such double perovskites. In this work, based on the earlier proposed cation-anion elastic bonds model, a theory of order-disorder phase transitions of B-cations in AB'B''O perovskites is presented, which allows reliable estimation of the phase transition temperatures and of the reduced lattice constants of such double perovskites.

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Phase transitions and electric properties of Pb₂InNbO₆and Pb₂ScNbO₆crystals with differing degree of ion ordering in the sites of the crystalline lattice

Cited by 42 publications

References 1 publication

Correlation between depolarization temperature and lattice distortion in quenched (Bi_1/2Na_1/2)TiO₃-based ceramics

Correlation between depolarization temperature and lattice distortion in quenched (Bi_1/2Na_1/2)TiO₃-based ceramics

Dielectric Characterization of Ba(Fe_1/3Nb_2/3)O₃Perovskite

Theory of order–disorder phase transitions of B-cations in AB′_1/2 B′′_1/2O₃ perovskites

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Phase transitions and electric properties of Pb2InNbO6and Pb2ScNbO6crystals with differing degree of ion ordering in the sites of the crystalline lattice

Cited by 42 publications

References 1 publication

Correlation between depolarization temperature and lattice distortion in quenched (Bi1/2Na1/2)TiO3-based ceramics

Correlation between depolarization temperature and lattice distortion in quenched (Bi1/2Na1/2)TiO3-based ceramics

Dielectric Characterization of Ba(Fe1/3Nb2/3)O3Perovskite

Theory of order–disorder phase transitions of B-cations in AB′1/2 B′′1/2O3 perovskites

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Phase transitions and electric properties of Pb₂InNbO₆and Pb₂ScNbO₆crystals with differing degree of ion ordering in the sites of the crystalline lattice

Correlation between depolarization temperature and lattice distortion in quenched (Bi_1/2Na_1/2)TiO₃-based ceramics

Correlation between depolarization temperature and lattice distortion in quenched (Bi_1/2Na_1/2)TiO₃-based ceramics

Dielectric Characterization of Ba(Fe_1/3Nb_2/3)O₃Perovskite

Theory of order–disorder phase transitions of B-cations in AB′_1/2 B′′_1/2O₃ perovskites