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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Бондарев, Виталий Сергеевич, Карташев, Андрей Васильевич, Горев, Михаил Васильевич, Флёров, Игорь Николаевич, Погорельцев, Евгений Ильич, Молокеев, Максим Сергеевич, Раевская С. И., Суздалев Д. В., Раевский И. П.
Заглавие : Теплофизические свойства керамики ниобата натрия в широкой области температур
Место публикации : Физ. тверд. тела. - 2013. - Т. 55, Вып. 4. - С. 752-758
Примечания : Работа выполнена при финансовой поддержке гранта Президента РФ по поддержке ведущих научных школ РФ (НШ-4828.2012.2) и гранта РФФИ N 12-02-31799\_мол\_а.
Аннотация: Выполнены исследования теплоемкости Cp(T) и коэффициента теплового расширения alpha(T) керамики NaNbO3 в области температур 2-800 K. Помимо аномалий, связанных с известными фазовыми переходами при T6~265 K, T5~638 K, T4~760 K и T3~793 K, обнаружены особенносaти поведения Cp(T) и alpha(T) вблизи T5''~500 K и T5'~600 K. Установлено, что все наблюдавшиеся структурные превращения в соответствии с величинами изменения энтропии не связаны с процессами упорядочения структурных элементов. Показано, что с ростом температуры объем ячейки при фазовых переходах вблизи 265, 515, 604 и 638 K убывает. Исследованы особенности перехода в фазу R3c . Проведен анализ двух возможных сценариев реализации последовательности фазовых превращений в интервале между T5 и T6.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bondarev V. S., Kartashev A. V., Gorev M. V., Flerov I. N., Pogoreltsev E. I., Molokeev M. S., Raevskaya S. I., Suzdalev D. V., Raevskii I. P.
Заглавие : Thermal and physical properties of sodium niobate ceramics over a wide temperature range
Место публикации : Phys. Solid State. - 2013. - Vol. 55, Is. 4. - P.821-828. - DOI 10.1134/S1063783413040045
Аннотация: The temperature dependences of the heat capacity C p (T) and thermal expansion coefficient α(T) of NaNbO3 ceramic samples have been investigated in the temperature range from 2 to 800 K. In addition to the anomalies associated with the known phase transitions at temperatures T 6 ≈ 265 K, T 5 ≈ 638 K, T 4 ≈ 760 K, and T 3 ≈ 793 K, anomalies in the behavior of C p (T) and α(T) have been observed near T 5″ ≈ 500 K and T 5′ ≈ 600 K. It has been found that all the observed structural transformations, according to the values of the entropy change, are not related to the ordering of structural elements. It has been shown that, with an increase in the temperature, the unit cell volume during the phase transitions near 265, 515, 604, and 638 K decreases. The specific features of the transition to the phase R3c have been examined. Two possible scenarios of the sequence of phase transformations in the temperature range between T 5 and T 6 have been analyzed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Atuchin V. V., Gavrilova T. A., Isaenko L. I., Kesler V. G., Molokeev M. S., Zhurkov S. A.
Заглавие : Synthesis and structural properties of cubic G0-Rb2KMoO3F3 oxyfluoride
Место публикации : Ceram. Int.: Elsevier, 2012. - Vol. 38, Is. 3. - P.2455-2459. - ISSN 0272-8842, DOI 10.1016/j.ceramint.2011.11.013
Примечания : Cited References: 23. - This study was partly supported by RFBR (Grant 09-02-00062) and SB RAS (Grant 34).
Предметные рубрики: PHASE-TRANSITIONS
FERROELECTRIC K3WO3F3
(NH4)(3)MOO3F3
TEMPERATURE
PEROVSKITE
ELPASOLITE
CRYSTALS
BEHAVIOR
High temperature
Melt solidification
Micromorphologies
Melt solidification
Microstructure-final
Oxyfluorides
Space Groups
Oxyfluorides
X ray methods
Ключевые слова (''Своб.индексиров.''): powders: solid state reaction--microstructure-final--x-ray methods--alkali oxides--halides
Аннотация: High-temperature G0 polymorph of Rb2KMoO3F3 has been prepared by melt solidification. Micromorphology and chemical properties of the final product were evaluated by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The elpasolite-related crystal structure of G0-Rb2KMoO3F3 has been refined by Rietveld method at T = 298 K (space group Fm-3m, a = 8.92446(8) Å, V = 710.76(1) Å3; RB = 3.55%). Ferroelectric G1-Rb2KMoO3F3 polymorph, earlier reported at T˂328 K, is not found at T = 298 K.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Edelman I. S., Ivanova O. S., Ivantsov R. D., Velikanov D. A., Zabluda V. N., Zubavichus Y., Veligzhanin A. A., Zaikovskiy V. I., Stepanov S., Artemenko A., Curely J., Kliava J.
Заглавие : Magnetic nanoparticles formed in glasses co-doped with iron and larger radius elements
Место публикации : J. Appl. Phys.: American Institute of Physics, 2012. - Vol. 112, Is. 8. - Ст.84331. - P. - ISSN 0021-8979, DOI 10.1063/1.4759244
Примечания : Cited References: 65. - This work was partly supported by the Russian Foundation for Basic Research, Grant Nos. 07-02-92174 RFBR-CNRS and 11-02-00972, and President of Russia Federation Grant No NSh 1044.2012.2. A. Artemenko acknowledges financial support from the Marie Curie International Incoming Fellowship within the 7th European Community Framework Programme (EPREXINA, GA 255662). The synchrotron measurements were supported via the Russian federal Contract No. 16.552.11.7003. The authors thank K. P. Polyakova for the preparation of thin films.
Предметные рубрики: SUPERPARAMAGNETIC RESONANCE
FERROMAGNETIC-RESONANCE
TEMPERATURE-DEPENDENCE
FERRITE NANOPARTICLES
OXIDE NANOPARTICLES
FARADAY-ROTATION
CERAMICS
ANISOTROPY
PARTICLES
SPECTRA
Аннотация: A new type of nanoparticle-containing glasses based on borate glasses co-doped with low contents of iron and larger radius elements, Dy, Tb, Gd, Ho, Er, Y, and Bi, is studied. Heat treatment of these glasses results in formation of magnetic nanoparticles, radically changing their physical properties. Transmission electron microscopy and synchrotron radiation-based techniques: x-ray diffraction, extended x-ray absorption fine structure, x-ray absorption near-edge structure, and small-angle x-ray scattering, show a broad distribution of nanoparticle sizes with characteristics depending on the treatment regime; a crystalline structure of these nanoparticles is detected in heat treated samples. Magnetic circular dichroism (MCD) studies of samples subjected to heat treatment as well as of maghemite, magnetite, and iron garnet allow to unambiguously assign the nanoparticle structure to maghemite, independently of co-dopant nature and of heat treatment regime used. Different features observed in the MCD spectra are related to different electron transitions in Fe3+ ions gathered in the nanoparticles. The static magnetization in heat treated samples has non-linear dependence on the magnetizing field with hysteresis. Zero-field cooled magnetization curves show that at higher temperatures the nanoparticles occur in superparamagnetic state with blocking temperatures above 100 K. Below ca. 20 K, a considerable contribution to both zero field-cooled and field-cooled magnetizations occurs from diluted paramagnetic ions. Variable-temperature electron magnetic resonance (EMR) studies unambiguously show that in as-prepared glasses paramagnetic ions are in diluted state and confirm the formation of magnetic nanoparticles already at earlier stages of heat treatment. Computer simulations of the EMR spectra corroborate the broad distribution of nanoparticle sizes found by "direct" techniques as well as superparamagnetic nanoparticle behaviour demonstrated in the magnetization studies. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4759244]
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Горев, Михаил Васильевич, Флёров, Игорь Николаевич, Карташев, Андрей Васильевич, Guillemet-Fritsch S.
Заглавие : Исследование теплового расширения и теплоемкости керамики CaCu[[d]]3[[/d]]Ti4O[[d]]12[[/d]]
Место публикации : Физ. тверд. тела. - 2012. - Т. 54, Вып. 9. - С. 1675-1679. - ISSN 0367-3294
Аннотация: Выполнены измерения теплового расширения керамики CaCu3Ti4O12 в широком интервале температур 120-1200 K. Качество исследованных образцов подтверждается хорошим согласием результатов измерений теплоемкости в интервале 2-300 K и в окрестности фазового перехода магнитной природы при 25 K с данными для монокристалла. Аномалий в тепловом расширении, которые могли бы быть связаны с предполагавшимся другими исследователями фазовым переходом при 726-732 K, обнаружено не было. Исследовано влияние на тепловое расширение термической обработки образца в атмосфере гелия и на воздухе. Работа выполнена при поддержке гранта президента РФ по поддержке ведущих научных школ РФ (НШ-4828.2012.2).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gorev M. V., Flerov I. N., Kartashev A. V., Guillemet-Fritsch S.
Заглавие : Investigation of the thermal expansion and heat capacity of the CaCu[[d]]3[[/d]]Ti[[d]]4[[/d]]O[[d]]12[[/d]] ceramics
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 54, Is. 9. - P.1785-1789. - ISSN 1063-7834, DOI 10.1134/S1063783412090120
Примечания : Cited References: 22. - This study was supported by 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: GIANT DIELECTRIC-CONSTANT
HIGH-TEMPERATURES
Аннотация: The thermal expansion of the CaCu3Ti4O12 ceramics has been measured over a wide temperature range 120–1200 K. The high quality of the samples under study has been confirmed by good agreement of the results of measurements of the heat capacity in the range 2–300 K and in the vicinity of the phase transition of magnetic nature at 25 K with the data for the single crystal. No anomalies in the thermal expansion that can be associated with the phase transition at 726–732 K assumed by other investigators have been found. The influence exerted on the thermal expansion by the heat treatment of the sample in a helium atmosphere and in air has been investigated.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Raevski I. P., Titov V. V., Malitskaya M. A., Eremin E. V., Kubrin S. P., Blazhevich A. V., Chen H., Chou C.-C., Raevskaya S. I., Zakharchenko I. N., Sarychev D. A., Shevtsova S. I.
Заглавие : Studies of ferroelectric and magnetic phase transitions in multiferroic PbFe0.5Ta0.5O3-PbTiO3 solid solution ceramics
Коллективы : Russian Foundation for Basic Research (RFBR) [12-08-00887_a]; Research Committee of the University of Macau
Место публикации : J. Mater. Sci.: Springer, 2014. - Vol. 49, Is. 18. - P.6459-6466. - ISSN 0022-2461, DOI 10.1007/s10853-014-8376-z. - ISSN 1573-4803
Примечания : Cited References: 35. - This study is partially supported by the Russian Foundation for Basic Research (RFBR) Project 12-08-00887_a and Research Committee of the University of Macau under Research and Development Grant for Chair Professor.
Предметные рубрики: MOSSBAUER
CRYSTALS
BEHAVIOR
NIOBATE
Аннотация: Dielectric, X-ray, Mossbauer and magnetization studies of (1 − x)PbFe0.5Ta0.5O3–(x)PbTiO3 ceramics with 0 ≤ x ≤ 0.3 have been carried out to determine the compositional evolution of ferroelectric and magnetic phase transition temperatures. Addition of PbTiO3 to PbFe0.5Ta0.5O3 increases the temperature T m of the dielectric permittivity maximum, decreases both the diffusion of this maximum and its frequency dependence. However, the Curie–Weiss temperature exceeds T m for all the compositions studied, indicating that the phase transition still remains diffused. Dilution of the (Fe, Ta)-sublattice by Ti lowers the Neel temperature T N but above a certain compositional threshold (x ≈ 0.1) fast lowering of T N stops and a new magnetic state stable in a rather wide compositional range appears. Large difference between the zero-field-cooled (ZFC) and FC magnetization–temperature curves as well as between the temperatures of magnetic phase transition determined from Mossbauer and magnetization studies for compositions with x 0.1 implies that this state is a spin-glass phase.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Atuchin V. V., Yelisseyev A. P., Galashov E. N., Molokeev M. S.
Заглавие : Synthesis and luminescence properties of Li2O–Y2O3–TeO2:Eu3+ tellurite glass
Коллективы : Ministry of Education and Science of the Russian Federation
Место публикации : Mater. Chem. Phys.: Elsevier Science, 2014. - Vol. 147, Is. 3. - P.1191-1194. - ISSN 0254-0584, DOI 10.1016/j.matchemphys.2014.07.003. - ISSN 1879-3312
Примечания : Cited References: 26. - This study is partly supported by the Ministry of Education and Science of the Russian Federation.
Предметные рубрики: LIGHT-EMITTING-DIODES
SPECTROSCOPIC PROPERTIES
OPTICAL-PROPERTIES
ENERGY-TRANSFER
CERAMICS
Eu3+
PHOTOLUMINESCENCE
TEMPERATURE
EMISSION
PHOSPHOR
Ключевые слова (''Своб.индексиров.''): glasses--heat treatment--photoluminescence spectroscopy--optical properties
Аннотация: The Eu3+-doped red-orange emitting phosphor of tellurite glass 0.25Li2O–0.20Y2O3–0.5TeO2–0.05Eu2O3 has been synthesized by the melt quenching method. The amorphous nature of the glass has been verified by XRD measurements. The photoluminescence excitation and emission spectra, the luminescence decay curves have been investigated for the composition. The phosphor can be efficiently excited by the near UV light to realize the intense narrow red emission line (611 nm) corresponding to forced electric dipole transition 5D0 → 7F2 of Eu3+ ions. The Li2O–Y2O3–TeO2:Eu3+glass phosphor is a potential red-orange emitting candidate for the application in WLEDs.
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Edelman I. S., Ivanova O. S., Zubavichus Y., Trofimova N. N., Zaikovskiy V. I., Artemenko A., Curely J., Kliava J.
Заглавие : Magnetic nanoparticles in borate glasses: Identification and sizing
Коллективы : Russian Foundation for Basic Research, Russian Foundation for Basic Research, International Conference on Optimization of Electrical and Electronic Equipmen (22 May - 24 May 2014; Bran, Romania)
Место публикации : International Conference on Optimization of Electrical and Electronic Equipment (OPTIM 2014): IEEE Computer Society, 2014. - P.95-104. - ISBN 978-1-4799-5183-3, DOI 10.1109/OPTIM.2014.6850939
Примечания : Cited References: 60
Предметные рубрики: Engineering, Electrical and Electronic
Ключевые слова (''Своб.индексиров.''): superparamagnetic resonance--ferromagnetic-resonance--ferrite nanoparticles--oxide nanoparticles--faraday-rotation--ceramics--iron--crystallization--anisotropy--particles
Аннотация: Heat treatment of borate glasses co-doped with low contents of iron and larger radius elements: Dy, Tb, Gd, Ho, Er, Y and Bi results in formation of magnetic nanoparticles, radically changing their physical properties. Transmission electron microscopy and synchrotron radiation-based techniques: XRD, EXAFS, XANES and SAXS, show a broad distribution of nanoparticle sizes with characteristic depending on the treatment regime; a crystalline structure of these nanoparticles is detected in heat treated samples. Magnetic circular dichroism (MCD) studies of samples subjected to heat treatment as well as of maghemite, magnetite and iron garnet allow to unambiguously assigning the nanoparticle structure to maghemite. Different features observed in the MCD spectra are related to different electron transitions in Fe3+ ions gathered in the nanoparticles. Variable-temperature electron magnetic resonance (EMR) studies confirm the formation of magnetic nanoparticles and the identification of their nature. Computer simulations of the EMR spectra corroborate the broad distribution of nanoparticle sizes found by 'direct' techniques. © 2014 IEEE.
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11.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Raevski I. P., Kubrin S. P., Blazhevich A. V., Molokeev M. S., Misjul S. V., Eremin E. V., Chen H., Chou C.-C., Sitalo E. I., Raevskaya S. I., Titov V. V., Sarychev D. A., Malitskaya M. A., Zakharchenko I. N.
Заглавие : Studies of ferroelectric and magnetic phase transitions in multiferroic PbFe0.5 B 0.5O3–PbTiO3 (B = Nb, Ta) solid solution ceramics
Коллективы : International Symposium on Physics and Mechanics of New Materials and Underwater Applications (5-8 June 2013; Kaohsiung, Taiwan)
Место публикации : Advanced materials: Physics, mechanics and applications: Springer, 2014. - Part II. - P.109-120. - (Springer Proceedings in Physics; Vol. 152). - ISBN 0930-8989, DOI 10.1007/978-3-319-03749-3_9. - ISBN 978-3-319-03748-6. - ISBN 978-3-319-03749-3 (eIBSN)
Примечания : Cited References: 35
Аннотация: Dielectric, X-ray, Mössbauer and magnetization studies of (1−x)PbFe0.5 B 0.5O3–(x)PbTiO3 (B = Nb, Ta) ceramics from the 0 x 0.3 range have been carried out. Addition of PbTiO3 to PbFe0.5 B 0.5O3 increases the temperature T m of the permittivity maximum, decreases the diffusion of this maximum and lowers the Neél temperature T N . However above a certain compositional threshold (x ≈ 0.1) fast lowering of T N stops and a new magnetic state stable in a rather wide compositional range appears. Large difference between the zero-field cooled and field-cooled magnetization-temperature curves as well as between the temperatures of magnetic phase transition determined from Mössbauer and magnetization studies for compositions with x 0.1 implies that this state is a spin glass phase.
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12.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Volkov N. V., Tarasov A. S., Gustaitsev A. O., Volkova O. N., Varnakov S. N., Ovchinnikov S. G.
Заглавие : Giant magnetoresistance in Fe/SiO2/p-Si hybrid structure under non-equilibrium conditions
Коллективы : China-Russia Symposium on Advaced Materials and Technologies (12; 2013 ; Nov. 18-22; Kunming, China)
Место публикации : Adv. metals, ceramics and composites: 12th China-Russia Symposium on Advaced Materials and Technologies. - 2013. - Pt. 2. - P.216-219: Proceedings. - ISBN 978-7-5415-7650-5
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13.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Krylov A. S., Adamczyk M., Kozielski L., Oreshonkov A. S., Shabanov A. V., Pugachev A., Krylova S. N.
Заглавие : Temperature Structural Changes in Relaxor Ferroelectric BBN Ceramics
Коллективы : Уральский Федеральный университет им. Первого Президента России Б.Н. Ельцина, "Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials", International conference (2014 ; 14-17 July; Ekaterinburg, Russa)
Место публикации : International conference «Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials» (PFM-2014). - 2014. - Ст.P-39. - P.126
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14.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Turchin P. P., Parfenov A. A., Beletsky Jun V. V., Volzhentcev A. A., Ruzanov V. M., Aleksandrov K. S.
Заглавие : The examination of frequency dependences of elastic waves velocities and their attenuation in heterogeneous mediums
Коллективы : IEEE International Ultrasonics symposium
Место публикации : Proceedings - IEEE Ultrasonics Symposium. - 2007. - Ст.4409985. - P.1637-1640. - ISBN 1051, DOI 10.1109/ULTSYM.2007.412. - ISBN 1424413834; 9781424413836
Ключевые слова (''Своб.индексиров.''): automation of measurings--ceramics--composites--elastic properties--physical acoustics--sound signal attenuation--elastic waves--elasticity--waves--automation of measurings--ceramics--composites--elastic properties--frequency dependences--frequency ranging--physical acoustics--sound signal attenuation--ultrasonics
Аннотация: The pulse - phase method for examination of ultrasonic waves propagation in materials, including mediums with high attenuation of a sound was designed. By automation methods of measurings the opportunity of determination the elastic waves velocities with an frequency range 100 kHz - 30 MHz with the resolution on frequency of 10-6 Hz is implemented. The phase method and a method of the frequency strobing for recording impulses are realized. These methods allow to define with precision not worse than 10-9 second the time of ultrasonic waves propagation. Requirements to the minimum linear dimensions of samples are restricted by the method sensitivity only. Velocities of elastic waves and their signal attenuation in ceramic and composites are measured. В© 2007 IEEE.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Vasilyev A. D., Zwegintsev S. A., Петров, Михаил Иванович, Khrustalev B. P.
Заглавие : Peculiarities of the resistive state of the (Y,Lu)1Ba2Cu3O7-δ superconducting ceramics
Место публикации : Physica C. - 1988. - Vol. 156, Is. 2. - P.249-250. - ISSN 0921-4534
Ключевые слова (''Своб.индексиров.''): ceramic materials--oxides--current voltage characteristics--yttrium barium copper oxides--superconducting materials
Аннотация: The resistive state of the high-Tc superconducting ceramics (Y, Lu)1Ba2Cu3O7-δ has been investigated, a hysteresis instability has been discovered in the current-voltage characteristics (CVC) under a current density j ≈ 1.7 kA cm-2. © 1988.
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Drokina T. V., Petrakovskii G. A.
Заглавие : Spin glasses state in zirconolites LnFeTi207 (Ln = Sm, Gd, Dy)
Коллективы : China-Russia Symposium on Advaced Materials and Technologies (12; 2013 ; Nov. 18-22; Kunming, China)
Место публикации : Adv. metals, ceramics and composites: 12th China-Russia Symposium on Advaced Materials and Technologies. - 2013. - Pt. 1. - P.143-146: Proceedings. - ISBN 978-7-5415-7650-5
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17.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Petrakovskii G. A.
Заглавие : Materials of spintronics
Коллективы : China-Russia Symposium on Advaced Materials and Technologies (12; 2013 ; Nov. 18-22; Kunming, China)
Место публикации : Adv. metals, ceramics and composites: 12th China-Russia Symposium on Advaced Materials and Technologies. - 2013. - Pt. 1. - P.155-159: Proceedings. - ISBN 978-7-5415-7650-5
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mikhaleva E. A., Eremin E. V., Flerov I. N., Kartashev A. V., Sablina K. A., Mikhashenok N. V.
Заглавие : Magnetization and magnetocaloric effect in La0.7Pb0.3MnO3 ceramics and 0.85(La0.7Pb0.3MnO3)–0.15(PbTiO3) composite
Коллективы : Council on Grants from the President of the Russian Federation forSupport of Leading Scientific Schools [NSh-924.2014.2]
Место публикации : J. Mater. Res. - 2015. - Vol. 30, Is. 2. - P.278-285. - ISSN 0884, DOI 10.1557/jmr.2014.369. - ISSN 20445326(eISSN)
Примечания : Cited References:29. - This work was supported by Council on Grants from the President of theRussian Federation for Support of Leading Scientific Schools (Grant No.NSh-924.2014.2).
Предметные рубрики: PHASE-TRANSITIONS
ELECTROCALORIC MATERIALS
Аннотация: The magnetization behavior under temperature and magnetic field variation was investigated for La0.7Pb0.3MnO3 ceramics and ferromagnetic-ferroelectric 0.85(La0.7Pb0.3MnO3)-0.15(PbTiO3) composite. The second-order ferromagnetic phase transition in manganite is shifted to the tricritical point in composite material. Comparison of the intensive caloric effect and the difference between relative cooling powers (RCP) in both materials proves a significant role of intrinsic pressure in elevating caloric efficiency in composite induced by elastic coupling between the grains of LPM and PT components. No temperature change in composite under an electric field of 2 kV/cm associated with electrocaloric effect or indirect magnetoelectric coupling was observed. The effect of magnetic field on some peculiar temperatures is considered. A contribution from pressure generated by magnetic field to baric coefficient dT/dp of ferromagnetic transformation temperature in composite was suggested. The results obtained were analyzed in the framework of the magnetic equation of state and compared with the experimentally measured heat capacity.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Flerov I. N., Mikhaleva E. A., Gorev M. V., Kartashev A. V.
Заглавие : Caloric and multicaloric effects in oxygen ferroics and multiferroics
Коллективы : Всероссийская конференция по физике сегнетоэлектриков
Место публикации : Phys. Solid State/ Всероссийская конференция по физике сегнетоэлектриков (20 ; 2014 ; 18-22 авг. ; Красноярск): MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 57, Is. 3. - P.429-441. - ISSN 1063, DOI 10.1134/S1063783415030075. - ISSN 10906460(eISSN)
Примечания : Cited References:53. - This study was supported by the Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools of the Russian Federation (grant no. NSh-924.2014.2).
Предметные рубрики: PHASE-TRANSITIONS
MAGNETOCALORIC MATERIALS
ELECTROCALORIC MATERIALS
REFRIGERATION
CERAMICS
OXYFLUORIDES
Аннотация: The main problems of the current state-of-the-art research into the caloric effects observed in oxygen ferroics, multiferroics, and composites, as well as the influence of different factors (anisotropy, dimensional parameters, direct and indirect interferroic interactions) on these effects, have been considered. Possible ways to increase the caloric efficiency of materials have been analyzed.
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20.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Gorev M. V., Bondarev V. S., Raevskaya S. I., Titov V. V., Raevskii I. P., Flerov I. N.
Заглавие : Studies of Heat Capacity and Thermal Expansion of Na1-xKxNbO3 and Na1-xLixNbO3 Solid Solution Ceramics
Коллективы : International Workshop on Phase Transitions and Inhomogeneous States in Oxides, "Фазовые переходы и неоднородные состояния в оксидах", международный семинар
Место публикации : Int. Workshop on Phase Transit. and Inhomogeneous States in Oxides: book of abstracts. - Kazan, 2015. - P.23
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