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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ershov A. A., Oreshonkov A. S., Shestakov N. P., Aleksandrovsky A. S., Vtyurin A. N.
Заглавие : Absorption spectra of PrF3 crystal
Коллективы : Russia-China workshop on dielectric and ferroelectric materials, Российская академия наук, Воронежский государственный технический университет
Место публикации : The Second Rus.-China Workshop on Dielectic and Ferroel. Mater.: program. - 2015. - Ст.P6.3. - P.82: abstract book
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S.
Заглавие : Mechanisms of the ferroelectric and structural phase transitions. Structural distortions in perovskites
Коллективы : International meeting on ferroelectricity
Место публикации : Ferroelectrics. - 1978. - Vol. 20, Spesial issue. - P.61-67. - DOI 10.1080/00150197808239430
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Ivanov Y. N., Schafer A. D.
Заглавие : Spectroscopic investigation of phase transitions in CsLiMoO//4 crystals.
Коллективы : European Meeting on Ferroelectricity
Место публикации : European Meeting on Ferroelectricity (5 ; 1983 ; Sept. ; 26-30 ; Malaga, Sp). Ferroelectrics. - 1983. - Vol. 55, Is. 1. - P.671-674. - ISSN 0015-0193
Ключевые слова (''Своб.индексиров.''): crystals - structure--magnetic resonance--spectroscopy, raman--cesium lithium molybdate--phase transitions--ferroelectric materials
Аннотация: Raman and NMR spectra in cubic and two distorted phases of CsLiMoO//4 have been studied. Phase transitions in the crystal are shown to belong to order-disorder type.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S.
Заглавие : Structural aspects of phase transitions in crystals
Коллективы : European Meeting on Ferroelectricity
Место публикации : European Meeting on Ferroelectricity (5 ; 1983 ; Sept. ; 26-30 ; Malaga, Sp). Ferroelectrics. - 1983. - Vol. 53, Is. 1. - P.153-154. - ISSN 0015-0193, DOI 10.1080/00150198408245044
Ключевые слова (''Своб.индексиров.''): ferroelectric materials--lithium compounds - x-ray analysis--phase transitions--crystals
Аннотация: Modern X-ray methods obtain in a short time the complete set of structural amplitudes and solve a crystal structure at constant temperatures (or pressures) on both sides of phase transition. A review of structure investigations with the crystals having the common formula Me prime Me double prime BX//4 (Me prime , Me double prime equals Li, Na, K, Rb, Cs, NH//4 and H; BX//4**2** plus equals SO//4, SeO//4, BeF//4, ZnCl//4) is presented.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Kruglik A. I., Zinenko V. I.
Заглавие : Structural investigations of new families of crystals
Коллективы : Всесоюзный семинар по физике сегнетоэластиков
Место публикации : Bulletin of the Academy of Sciences of the U.S.S.R. Physical series: Proc of the 2nd All-Union Semin on the Phys of Ferroelastics. - 1982. - Vol. 47, Is. 3. - P.103-109. - ISSN 0001-432X
Ключевые слова (''Своб.индексиров.''): ferroelectric materials--disproportionate phases--ferroelastics--phase transitions--crystals
Аннотация: For the example of ferroelectrics and ferroelastics, the results of precision structural investigations performed above and below the phase-transition point are discussed. The structural features of some crystals with disproportionate phases are considered. Numerous examples have shown that anomalously high thermal factors of certain atoms may indicate potential instability of the structure of the given crystal and thereby also a tendency to distortion with change in thermodynamic conditions. This must be taken into account in further structural work.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrova I. P., Shemetov E. V., Serebrennikov V. L.
Заглавие : High-pressure nqr study of the ferroelectric phase-transition in Rb2ZnBr4
Место публикации : Fiz. Tverd. Tela. - 1987. - Vol. 29, Is. 9. - P.2651-2657. - ISSN 0367-3294
Примечания : Cited References: 13
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrova I. P., Yuzvak V. I., Shabanov V. F.
Заглавие : Mechanisms of ferroelectric phase transition in crystals with reorientating structural groups
Коллективы : Congres Europeen de Ferroelectricite
Место публикации : J. Phys. Colloques: Supplement au Journal de Physique. - 1972. - Vol. 33, No. C2. - P.63-65. - ISSN 0449-1947, DOI https://doi.org/10.1051/jphyscol:1972217
Аннотация: Ferroelectric transition in NaNH4SeO4.2 H2O crystals was investigated by various spectroscopical methods. Characteristic features of polarization mechanism in crystals with reorientating polar groups are discussed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrova I. P., Shekmasova T. I.
Заглавие : The ferroelectric and pressure induced phase transitions in LiNH4SO4
Коллективы : International meeting on ferroelectricity
Место публикации : Ferroelectrics. - 1978. - Vol. 20, Spesial issue. - P.283-284. - DOI 10.1080/00150197808237237
Аннотация: The model and statistical description of the phase transitions in LiNH4SO4 were proposed. The nmr investigation of the high pressure phase was carried out.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Andryushin N. D., Pavlovskiy M. S., Zinenko V. I.
Заглавие : Lattice dynamics in improper ferroelectric YGaO3
Место публикации : Ferroelectrics. - 2020. - Vol. 567, Is. 1: Special Issue in Honor of Professor Stanislav A. Grindev on the Occasion of His 83rd Birthday. - P.28-36. - ISSN 00150193 (ISSN), DOI 10.1080/00150193.2020.1791584
Примечания : Cited References: 19. - This study was supported by the Russian Foundation for Basic Research and Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund by project No. 18-02-00130
Аннотация: The structural phase transition P63/mmc → P63cm in hexagonal YGaO3 crystal is studied by first-principles methods. From lattice dynamics calculations it was obtained that the mechanism of transition into polar phase is similar to the one in isostructural YMnO3 crystal. As a result of calculations the improper ferroelectricity and electrical polarization were revealed in YGaO3.
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Andryushin N. D., Pavlovski M. S., Zinenko V. I.
Заглавие : Pressure induced ferroelectric phase transition in GdFe3(BO3)4
Коллективы : Joint Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, Young scientists school on the spectroscopic, Физико-технический институт им. А.Ф. Иоффе РАН, Санкт-Петербургский политехнический университет им. Петра Великого
Место публикации : Joint 14th Rus./CIS/Baltic/Japan Symp. on Ferroelectricity (RCBJSF)/ Young sci. school on the spect. studies of critical dynamics at struct. phase trans.: Abstract book/ org. comm. A. N. Vtyurin ; progr. comm. I. N. Flerov. - 2018. - P.92. - ISBN 978-5-9651-1144-2
Примечания : Cited References:
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11.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Mikhaleva E. A., Gorev M. V., Molokeev M. S., Kartashev A. V., Flerov I. N.
Заглавие : Anisotropy of piezocaloric effect at ferroelectric phase transitions in ammonium hydrogen sulphate
Коллективы : Fall Meeting, European Materials Research Society, European Materials Research Society, Warsaw University of Technology
Место публикации : E-MRS fall meeting: conference programme. - 2019. - Ст.E.P.4
Примечания : This work was supported by the Russian Science Foundation (RSF) grant (No. 19-72-00023)
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mikhaleva E. A., Gorev M. V., Molokeev M. S., Kartashev A. V., Flerov I. N.
Заглавие : Anisotropy of piezocaloric effect at ferroelectric phase transitions in ammonium hydrogen sulphate
Место публикации : J. Alloys Compd. - 2020. - Vol. 839. - Ст.155085. - ISSN 09258388 (ISSN), DOI 10.1016/j.jallcom.2020.155085
Примечания : Cited References: 31. - The reported study was supported by the Russian Science Foundation (project no. 19-72-00023 ). X-ray and dilatometric data were obtained using the equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS"
Аннотация: The role of anisotropy of the thermal expansion in formation of piezocaloric effect (PCE) near ferroelectric phase transitions in NH4HSO4 was studied. Strong difference in linear baric coefficients and as a result in intensive and extensive PCE associated with the different crystallographic axes was found. PCE giving the main contribution to the barocaloric effect were determined at both phase transitions. Rather strong effect of the lattice dilatation on the tuning of PCE was observed. Comparative analysis of PCE at the phase transitions in different materials showed that NH4HSO4 can be considered as a promising solid-state refrigerant. A hypothetical cooling cycle based on alternate using uniaxial pressure along two axes was considered.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gridnev S. A., Safonova L. P., Ivanov O. N., Davydova T. N.
Заглавие : Anomalous behavior of the elastic and inelastic properties in the ferroelectric phase of single-crystal (NH4)(2)SO4
Место публикации : Phys. Solid State: AMER INST PHYSICS, 1998. - Vol. 40, Is. 12. - P1998-2001. - ISSN 1063-7834, DOI 10.1134/1.1130702
Примечания : Cited References: 8
Аннотация: The anomalous changes of the low-frequency elastic and inelastic properties of single-crystal (NH4)(2)SO4 accompanying the phase transition from the paraelectric to the ferroelectric phase have been studied by the reverse torsion-pendulum method at 223 K and in the temperature region where the spontaneous polarization changes sign. (C) 1998 American Institute of Physics. [S1063-7834(98)01412-9].
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Udod L. V., Sitnikov M. N.
Заглавие : Electronic transition, ferroelectric and thermoelectric properties of bismuth pyrostannate Bi2(Sn0.85Cr0.15)2O7
Место публикации : Ceram. Int. - 2018. - Vol. 44, Is. 2. - P.1614-1620. - ISSN 02728842 (ISSN), DOI 10.1016/j.ceramint.2017.10.082
Примечания : Cited References: 41. - The authors would like to thank M. Molokeev for the clarification of x-ray spectra. The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project № 16–52-00045 bel_a.
Ключевые слова (''Своб.индексиров.''): dielectric properties--ferroelectric properties--impedance--thermopower--electrical properties
Аннотация: The ferroelectric properties of bismuth pyrostannate Bi2(Sn0.85Cr0.15)2O7 in the high-temperature region are established. The linear thermal expansion coefficient, electrical resistance, impedance, I−V characteristics, capacitance, loss-angle tangent, charge, and thermopower of the investigated material are measured in the temperature range of 300−700 K at frequencies of 102−106 Hz. Anomalies of the thermal expansion coefficient and hodograph spectrum variation in the region of polymorphic phase transitions are observed. The high resistance and change of the hopping conductivity for the tunnel-emission are found. The hysteresis in the electric field dependence of polarization is established. The change in the thermopower sign with temperature is revealed. The obtained experimental data are explained in the framework of the model of migration polarization by charged chromium ions.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aver'yanov E. M.
Заглавие : Anisotropy of dipole-dipole interactions in ferroelectric langmuir films of poly(vinylidene fluoride-trifluoroethylene)
Место публикации : JETP Letters. - 2014. - Vol. 99, Is. 10. - P.590-593. - ISSN 0021-3640, DOI 10.1134/S0021364014100026. - ISSN 1090-6487
Примечания : Cited References: 12
Предметные рубрики: LOCAL-FIELD
BLODGETT-FILMS
COPOLYMER
Аннотация: The Lorentz tensor components L (j) for poly(vinylidene fluoride-trifluoroethylene, 70/30) Langmuir-Blodgett films in the ferroelectric phase are determined experimentally. The results indicate that intralayer dipole-dipole interaction between the segments of the polymer is stronger than interlayer interaction. This conclusion agrees with the absence of the critical film thickness below which ferroelectricity would cease to exist.
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Flerov I.N., Gorev M.V.
Заглавие : Barocaloric and piezocaloric effects in some ferroelectric and fer- roelastic oxyfluorides
Коллективы : European Meeting on Ferroelectricity
Место публикации : 12th European Meeting on Ferroelectricity: Abstracts. - 2011. - Ст.9A-20
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mikhaleva E. A., Flerov I. N., Gorev M. V., Molokeev M. S., Cherepakhin A. V., Kartashev A. V., Mikhashenok N. V., Sablina K. A.
Заглавие : Caloric characteristics of PbTiO3 in the temperature range of the ferroelectric phase transition
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 54, Is. 9. - P.1832-1840. - ISSN 1063-7834, DOI 10.1134/S1063783412090181
Примечания : Cited References: 31. - This study was supported by the Russian Foundation for Basic Research (project no. 12-08-00079) and the Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools of the Russian Federation (grant no. NSh-4828.2012.2).
Предметные рубрики: SINGLE-CRYSTALS
LEAD TITANATE
DIELECTRIC PROPERTIES
SOLID-SOLUTIONS
PRESSURE
PEROVSKITES
DEPENDENCE
BEHAVIOR
HEAT
Аннотация: The heat capacity and thermal expansion of the PbTiO3 ceramic sample have been measured in the temperature range 80–970 K. The electrocaloric and barocaloric efficiencies of lead titanate in the ferroelectric phase transition range have been investigated by analyzing the experimental data in terms of the thermodynamic theory of phase transitions, the electrical equation of state P(T, E), the Pippard equation, and the S(T, p) diagram.
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18.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Mikhaleva E. A., Kartashev A. V., Gorev M. V., Cherepakhin A. V., Sablina K. A., Mikhashenok N. V., Flerov I. N.
Заглавие : Caloric effects and phase transitions in ferroelectric-ferromagnetic composites (x) La0.7Pb0.3MnO3 – (1-x) PbTiO3
Коллективы : Functional Materials and Nanotechnologies
Место публикации : International Conference “Functional materials and nanotechnologies” FM&NT 2012. - 2012. - P.82
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mikhaleva E. A., Flerov I. N., Kartashev A. V., Gorev M. V., Cherepakhin A. V., Sablina K. A., Mikhashenok N. V., Volkov N. V., Shabanov A. V.
Заглавие : Caloric effects and phase transitions in ferromagnetic-ferroelectric composites xLa(0.7)Pb(0.3)MnO(3)-(1-x)PbTiO3
Коллективы : Russian Foundation for Basic Research [12-02-31253-mol-a]; Federal Special Program "Scientific and scientific-pedagogical staff of innovative Russia" [N 8379]; Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools [NSh-4828.2012.2]
Место публикации : J. Mater. Res. - 2013. - Vol. 28, Is. 24. - P.3322-3331. - ISSN 0884-2914, DOI 10.1557/jmr.2013.360. - ISSN 2044-5326
Примечания : Cited References: 24. - This study was supported in parts by The Russian Foundation for Basic Research (Grant No. 12-02-31253-mol-a), Federal Special Program "Scientific and scientific-pedagogical staff of innovative Russia" (N 8379), and Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools (Grant NO. NSh-4828.2012.2). Dr. Maxim S. Molokeev is acknowledged for the x-ray characterization of the samples.
Предметные рубрики: PRESSURE
TEMPERATURE
Аннотация: Ceramic volumetric composites xLa(0.7)Pb(0.3)MnO(3)-(1-x)PbTiO3 (x = 0.18 and 0.85) were prepared. X-ray investigations have shown that rather low sintering temperature (800 degrees C) has allowed us to avoid the reaction and interdiffusion between two initial phases. Heat capacity, thermal expansion, and intensive magnetocaloric effect were measured in a wide temperature range. The sample composition has a low influence on temperatures of the ferromagnetic and ferroelectric phase transitions in composites. Electro- and barocaloric effects were determined by analysis in the framework of thermodynamic theory, electric equation of state, Maxwell relationships, and entropy-temperature-pressure phase diagram. Multicaloric efficiency of composites is discussed and compared with that of initial La0.7Pb0.3MnO3 and PbTiO3 compounds. Variation of a relationship between components can significantly increase both barocaloric and magnetocaloric efficiency of compositional material due to the mechanical stress appearing between grains of different ferroic phases under magnetic field.
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20.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Flerov I. N., Gorev M. V., Mikhaleva E. A., Kartashev A. V., Bondarev V. S.
Заглавие : Caloric Effects in Some Ferroelectric and Ferroelastic Fluorides, Oxyfluorides and Oxides
Коллективы : Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, International Workshop on Relaxor Ferroelectrics
Место публикации : Joint 13th Russia/CIS/Baltic/Japan Symp. on Ferroelectricity and Int. Workshop on Relaxor Ferroelectrics (RCBJSF-IWRF 2016): book of abstracts. - 2016. - Ст.Invite-6
Примечания : References: 4. - The reported study was partially supported by RFBR, research project No. 15-02-02009 a
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