Peculiarities of ferro-antiferro-electric phase transitions. 3. Phenomenological approach to the problem of fe and afe phases coexistence. Nonuniform state

Ishchuk, V. M.

doi:10.1080/00150199708228341

Cited by 17 publications

(27 citation statements)

References 7 publications

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“…Our results [4,7,15] allow to propose a mechanism of "pressing out" paraelectric PT towards the low-temperature region with its simultaneous diffuseness. The decisive factor which defines the said PT behavior is the above-considered mechanism of ions separation at the interphase FE-AFE boundary inside the two-phase domains.…”

Section: Peculiarities Of "Composition-temperature" Phase Diagrams Ofmentioning

confidence: 78%

Peculiarities of Ferro-Antiferroelectric Phase Transitions 9. Can the Substances with Coexisting Ferroelectric and Antiferroelectric Phases Mimic the Dipole-Glass Behavior?

Ishchuk¹,

Sobolev

2011

Ferroelectrics

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We demonstrate that the substances with coexisting ferroelectric and antiferroelectric phases possess properties characteristic for the "dipole glasses". Possible phase diagrams of such substances are discussed. Main attention is paid to the long-time relaxation of physical characteristics of these compounds after their thermodynamic equilibrium was disturbed by external influences. The long-time relaxation and the pronounced frequency dependence of parameters (for example, dependence of characteristics on the frequency of measuring field) are the main features due to which these systems are classified as dipole glasses. Our main purpose is to call attention to the fact that one has to be cautious during the interpretation of experimental results in substances with inhomogeneous states of coexisting domains of ferroelectric and antiferroelectric phases.

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Section: Peculiarities Of "Composition-temperature" Phase Diagrams Ofmentioning

confidence: 78%

Peculiarities of Ferro-Antiferroelectric Phase Transitions 9. Can the Substances with Coexisting Ferroelectric and Antiferroelectric Phases Mimic the Dipole-Glass Behavior?

Ishchuk¹,

Sobolev

2011

Ferroelectrics

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“…(1) is discussed in Ref. 13. The order parameters P 1 and 1 correspond to the domain of the FE phase while P 2 and 2 are the order parameters of the AFE phase, 1 and 2 are the shares of the FE and AFE phases in the crystal volume.…”

Section: Diffuseness Of the Phase Transition From Paraelectric To Ordmentioning

confidence: 99%

“…In the simplest case of the equal stability of these phases (here the equality of the free energies of these phases is meant), in the frames of the phenomenological Landau-Ginsburg theory the energy describing this interaction can be represented in the following form 13,14,16 :…”

Section: Diffuseness Of the Phase Transition From Paraelectric To Ordmentioning

confidence: 99%

“…Due to this, the interaction is essential in the vicinity of the boundaries and its influence decreases when the distance from the boundary increases. This interaction gives the energy gain for the zone in the vicinity of the boundary (this zone is determined by the region where coefficients C 1 and D 2 have nonzero values) 13,16 :…”

Section: Diffuseness Of the Phase Transition From Paraelectric To Ordmentioning

confidence: 99%

“…[13][14][15][16] The goal of our study has been the search and investigation of such effects in the PZT-based solid solutions with the compositions from the MPB region of the \composition-temperature" phase diagram. In no case, we try to assert the absence of the monoclinic phase in the PZT solid solutions.…”

Section: Introductionmentioning

confidence: 99%

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Effects caused by antiferroelectric nanodomains in PZT-based coarse-grained ceramics with compositions from the morphotropic boundary region

2017

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Presented results demonstrate importance of taking into account such a phenomenon as the solid solution decomposition at the boundaries separating coexisting phases in lead zirconate-titanate-based solid solutions with compositions belonging to the morphotropic boundary region of the \temperature-composition" phase diagram. It is shown that in the local decomposition of solid solutions in the vicinity of the boundaries separating the tetragonal and rhombohedral phases in lead zirconate-titanate-based solid solutions lead to the changes of the solid solution's chemical composition and to the formation of segregates. It is also shown that the proper thermoelectric treatment of samples containing these segregates can give substantially higher values of piezoelectric parameters in the lead zirconate-titanate-based compounds.

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Dielectric and Electrooptic Properties of the DMAMeS (Me = Al, Ga) Crystals in the Region of Low Temperature Phases

Kapustianik

Sveleba

Stasyuk

et al. 2001

phys. stat. sol. (b)

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This paper presents the results of investigations of the dielectric, birefringent and electrooptic properties of NH 2 (CH 3 ) 2 Me(SO 4 ) 2 Á 6H 2 O (Me ¼ Al, Ga) crystals. The data obtained are compared with the predictions of a phenomenological theory. In particular, the temperature behaviour of the dielectric susceptibility components and their anomalies in the vicinity of phase transition points were investigated in details. The specific behaviour of the studied parameters in the low temperature region was related to the coexistence of ferroelectric and antiferroelectric ordering of the dimethylammonium groups carrying a dipole moment. phys. stat. sol. (b) 228, No. 3, 785-798 (2001) # WILEY-

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Peculiarities of ferro-antiferro-electric phase transitions. 3. Phenomenological approach to the problem of fe and afe phases coexistence. Nonuniform state

Cited by 17 publications

References 7 publications

Peculiarities of Ferro-Antiferroelectric Phase Transitions 9. Can the Substances with Coexisting Ferroelectric and Antiferroelectric Phases Mimic the Dipole-Glass Behavior?

Peculiarities of Ferro-Antiferroelectric Phase Transitions 9. Can the Substances with Coexisting Ferroelectric and Antiferroelectric Phases Mimic the Dipole-Glass Behavior?

Effects caused by antiferroelectric nanodomains in PZT-based coarse-grained ceramics with compositions from the morphotropic boundary region

Dielectric and Electrooptic Properties of the DMAMeS (Me = Al, Ga) Crystals in the Region of Low Temperature Phases

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