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1.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Vtyurin A. N., Krylov A. S., Goryainov S. V., Krylova S. N., Oreshonkov A. S., Voronov V. N.
Заглавие
: A raman study of hydrostatic
pressure
induced phase transitions in Rb2KInF6 crystals
Место публикации
: Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 54, Is. 5. - P.934-936. - ISSN 1063-7834,
DOI
10.1134/S1063783412050472
Примечания
: Cited References: 16. - This study was supported by the Russian Foundation for Basic Research (project nos. 11-02-98002-r_sibir' and 09-02-00062), the Siberian Branch of the Russian Academy of Sciences (integration project no. 101), and the Council on Grants from the President of the Russian Federation (grant no. HSh-4645.2010.2).
Предметные рубрики:
LATTICE-DYNAMICS
ELPASOLITES
SPECTRA
Аннотация:
The Raman spectra of the elpasolite (Rb2KInF6) crystal have been studied in the
pressure
range from 0 to 5.3 GPa at a temperature of 295 K. A phase transition at a
pressure
of approximately 0.9 GPa has been found. An analysis of the variations in the spectral parameters has led to the conclusion that the phase transition to a distorted phase is accompanied by the doubling of the volume of the primitive cell of the initial cubic phase. Numerical calculations of the lattice dynamics in the Rb2KInF6 crystal have been performed. The numerical simulation has established that the phase transition at a
pressure
of 0.9 GPa is associated with condensation of the F (lg) mode. A probable high-
pressure
phase is the phase with space group C2/m.
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2.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Aleksandrov K. S., Beznosikov B. V.
Заглавие
: Crystal chemistry and prediction of compounds with a structure of skutterudite type
Место публикации
: Crystallogr. Rep. - 2007. - Vol. 52, Is. 1. - P.28-36. - ISSN 1063-7745,
DOI
10.1134/S106377450701004X
Примечания
: Cited References: 47
Предметные рубрики:
SUPERCONDUCTOR PROS4SB12
MAGNETIC-PROPERTIES
HIGH-
PRESSURE
RARE-EARTH
TRANSITION
LAFE4P12
Аннотация:
Crystallochemical analysis of skutterudite-type structures in the BX3, AB(4)X(12), and A B-3' B4O12 compositions (A and B are metals; X = P, As, Sb) has been performed. Probable regions of structure formation are determined, thereby indicating that more than 270 new compounds of the AB4X12 composition can be synthesized.(1)
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3.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Aleksandrov K. S., Beznosikov B. V.
Заглавие
: Hierarchies of perovskite-like crystals (Review)
Место публикации
: Phys. Solid State: AMER INST PHYSICS, 1997. - Vol. 39, Is. 5. - P.695-715. - ISSN 1063-7834,
DOI
10.1134/1.1130120
Примечания
: Cited References: 143
Предметные рубрики:
CU-O SYSTEM
HIGH-
PRESSURE
SYNTHESIS
SUPERCONDUCTING COPPER OXIDES
STRUCTURAL PHASE-TRANSITIONS
NEUTRON POWDER DIFFRACTION
SINGLE-CRYSTAL
X-RAY
CUPRATE SUPERCONDUCTORS
DIELECTRIC-PROPERTIES
HOMOLOGOUS SERIES
Аннотация:
A system of mutual relationships (a hierarchy) is constructed between various perovskite-like crystal structures based on available structural data. All the perovskite-like structures are characterized by a common indicator of their relationship-the presence of layers, stacks, or frameworks made up of BX6 octahedra linked at their vertices (where B is a cation, X is an anion) or fragments of octahedra in the form of BX5 pyramids or BX4 squares in anion-deficient compounds. In layered structures, these stacks are joined to each other by various intermediate blocks. It is well known that one homological series of compounds is constructed by increasing the number of layers in a stack while preserving the same kind of connecting block. Crystals of various series that contain identical stacks (but different blocks of one or two types) can also be related to one another via this feature. The hierarchical system includes compounds with small distortions in their structures for various reasons. (C) 1997 American Institute of Physics.
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4.
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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5.
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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6.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Bataleva Y. V., Palyanov Y. N., Borzdov Y. M., Novoselov I. D., Bayukov O. A.
Заглавие
: An effect of reduced S-rich fluids on diamond formation under mantle-slab interaction
Место публикации
: Lithos. - 2019. - Vol. 336-337. - P.27-39. - ISSN 00244937 (ISSN),
DOI
10.1016/j.lithos.2019.03.027
Примечания
: Cited References: 73. - This work was supported by the Russian Science Foundation under Grant No. 14-27-00054 and a state assignment of IGM SB RAS. The authors thank S. Ovchinnikov for his assistance in implementation of the Mossbauer spectroscopy measurements.
Аннотация:
Experimental study, dedicated to understanding the effect of S-rich reduced fluids on the diamond-forming processes under subduction settings, was performed using a multi-anvil high-
pressure
split-sphere apparatus in Fe3C-(Mg,Ca)CO3-S and Fe0-(Mg,Ca)CO3-S systems at the
pressure
of 6.3 GPa, temperatures in the range of 900–1600 °C and run time of 18–60 h. At the temperatures of 900 and 1000 °C in the carbide-carbonate-sulfur system, extraction of carbon from cohenite through the interaction with S-rich reduced fluid, as well as C0-producing redox reactions of carbonate with carbide were realized. As a result, graphite formation in assemblage with magnesiowüstite, cohenite and pyrrhotite (±aragonite) was established. At higher temperatures (≥1100 °C) formation of assemblage of Fe3+-magnesiowüstite and graphite was accompanied by generation of fO2-contrasting melts - metal-sulfide with dissolved carbon (Fe-S-C) and sulfide-oxide (Fe-S-O). In the temperature range of 1400–1600 °C spontaneous diamond nucleation was found to occur via redox interactions of carbide or iron with carbonate. It was established, that interactions of Fe-S-C and Fe-S-O melts as well as of Fe-S-C melt and magnesiowüstite, were С0-forming processes, accompanied by disproportionation of Fe. These resulted in the crystallization of Fe3+-magnesiowüstite+graphite assemblage and growth of diamond. We show that a participation of sulfur in subduction-related elemental carbon-forming processes results in sharp decrease of partial melting temperatures (~300 °C), reducting the reactivity of the Fe-S-C melt relatively to FeC melt with respect to graphite and diamond crystallization and decrease of diamond growth rate.
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7.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Ivanova N. B., Kazak N. V., Markov V. V., Ovchinnikov S. G., Rudenko V. V., Abd-Elmeguid M. M.
Заглавие
: Analysis of the electrical and optical properties of VBO3 single crystals and Fe1-xVxBO3 solid solutions on the basis of a many-electron model of energy band structure
Место публикации
: Phys. Solid State: AMER INST PHYSICS, 2004. - Vol. 46, Is. 8. - P1462-1468. - ISSN 1063-7834,
DOI
10.1134/1.1788779
Примечания
: Cited References: 32. - One of the authors (M.M.A.) would like to thank the Deutsche Forschungsgemeinschaft (SFB608) for financial support. This study was supported by the Russian Foundation for Basic Research (project no. 03-02-16286), the program "Integration" (project no. B0017), and the program of the Division of Physical Sciences of the Russian Academy of Sciences "Strongly Correlated Electrons"
Предметные рубрики:
MAGNETIC-PROPERTIES
CALCITE STRUCTURE
PHASE-TRANSITION
FERRIC BORATE
HIGH-
PRESSURE
FEBO3
FE1-XCRXBO3
FERROMAGNET
MOSSBAUER
SPECTRA
Аннотация:
A many-electron model of the energy band structure of VBO3 and of Fe1 - xVxBO3 solid solutions is proposed with strong electron correlations taken into account. Experimental optical absorption spectra and data on the resistivity are discussed in the framework of the suggested model. Variation in the magnetic and electronic properties of VBO3 and Fe1 - xVxBO3 under high
pressure
is predicted. For VBO3, a Mott-Hubbard (insulator-metal) transition is expected in the high-
pressure
phase. In Fe1 - xVxBO3 solid solutions, a nontrivial variation in the properties is predicted, leading to the appearance of a different magnetic state. (C) 2004 MAIK "Nauka / Interperiodica".
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8.
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:
Материалы конференции
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9.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Pugachev A. M., Zaytseva I. V., Surovtsev N. V., Krylov A. S.
Заглавие
: Anharmonicity and local noncentrosymmetric regions in BaTiO3 pressed powder studied by the Raman line temperature dependence
Место публикации
: Ceram. Int. - 2020. - Vol. 46, Is. 14. - P.22619-22623. - ISSN 02728842 (ISSN),
DOI
10.1016/j.ceramint.2020.06.024
Примечания
: Cited References: 26. - The reported study was funded by RFBR , according to the research project No. 18-02-00399 and 19-42-543-016 , Government of Novosibirsk region No. 19-42-543-016 and State assignment No AAAA-A17-117052410033-9. The experiments were performed in the multiple-access center “High-Resolution Spectroscopy of Gases and Condensed Matter” in IA&E SB RAS (Novosibirsk, Russia) and Center for Common Use of the Krasnoyarsk Scientific Center, SB RAS (Krasnoyarsk, Russia)
Аннотация:
The temperature dependencies of position, width, and integral amplitude the E(TO) line near 307 cm−1 in Raman spectra in barium titanate powders with different non-hydrostatic
pressure
and temperature treatment were studied. It was found that parameters of the E(TO) line near 307 cm−1 are different in the crystal, the untreated powder, the powder treated by the non-hydrostatic
pressure
, and the powder annealed after the
pressure
treatment. The line width (FWHM) increase with temperature according to Klemens model. It indicates that the origin of the line broadening is the anharmonicity of the E(TO) phonons. The
pressure
treatment changes the anharmonicity of the phonon potential. It was found that the temperature dependence of the integral intensity of the E(TO) line is similar to that of the second optical harmonic signal and reflects the presence of the local polar regions. Thus, the E(TO) line in the Raman spectrum allows one to characterize the average polarity of local regions and their anharmonicity depending on non-hydrostatic pressures and thermal treatment.
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10.
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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11.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Bogdanov E. V., Kartashev A. V., Pogoreltsev E. I., Gorev M. V., Laptash N. M., Flerov I. N.
Заглавие
: Anomalous behaviour of thermodynamic properties at successive phase transitions in (NH4)3GeF7
Место публикации
: J. Solid State Chem. - 2017. - Vol. 256. - P.162-167. - ISSN 00224596 (ISSN),
DOI
10.1016/j.jssc.2017.09.010
Примечания
: Cited References: 23. - The reported study was partially supported by the Russian Foundation for Basic Research, research project no. 15-02-02009 a.
Ключевые слова
(''Своб.индексиров.''): phase transition--fluorides--heat capacity--entropy--thermal expansion--high
pressure
Аннотация:
Heat capacity, thermal dilatation, susceptibility to hydrostatic
pressure
and dielectric properties associated with succession of three phase transitions below room temperature in double fluoride salt (NH4)3GeF7 were studied. A possible transformation into the parent Pm-3m cubic phase was not observed up to the decomposition of compound. Nonferroelectric nature of structural distortions was confirmed. The DTA under
pressure
studies revealed a high temperature stability of two phases: P4/mbm and Pbam. The entropies of the phase transitions agree well with the model of structural distortions. Analysis of the thermal properties associated with the individual phase transitions in the framework of thermodynamic equations has shown a high reliability of the data obtained. © 2017 Elsevier Inc.
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12.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Jiang X., Molokeev M. S., Dong L., Dong Z., Wang N., Kang L., Li X., Li Y., Tian C., Peng S., Li W., Lin Z.
Заглавие
: Anomalous mechanical materials squeezing three-dimensional volume compressibility into one dimension
Место публикации
: Nat. Commun. - 2020. - Vol. 11, Is. 1. - Ст.5593. - ISSN 20411723 (ISSN),
DOI
10.1038/s41467-020-19219-5
Примечания
: Cited References: 49. - The authors acknowledge Zhuohong Yin for useful discussions and the experimental time provided by the 4W2 beam line of Beijing Synchrotron Radiation Facility (BSRF). This work was supported by the National Scientific Foundations of China (Grants 51702330, 11974360, 51872297, 51890864, 21975132, and 21991143), the Youth Innovation Promotion Association in CAS (Grant 2017035 for X.J.), Young Elite Scientist Sponsorship Program by CAST (YESS), and Fujian Institute of Innovation (FJCXY18010201) in CAS
Аннотация:
Anomalous mechanical materials, with counterintuitive stress-strain responding behaviors, have emerged as novel type of functional materials with highly enhanced performances. Here we demonstrate that the materials with coexisting negative, zero and positive linear compressibilities can squeeze three-dimensional volume compressibility into one dimension, and provide a general and effective way to precisely stabilize the transmission processes under high
pressure
. We propose a “corrugated-graphite-like” structural model and discover lithium metaborate (LiBO2) to be the first material with such a mechanical behavior. The capability to keep the flux density stability under
pressure
in LiBO2 is at least two orders higher than that in conventional materials. Our study opens a way to the design and search of ultrastable transmission materials under extreme conditions.
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13.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Bulina N. V., Lopatin V. A., Vnukova N. G., Osipova I. V., Churilov G. N., Krtschmer W.
Заглавие
: Arc synthesis of silicon-doped heterofullerenes in plasma at atmospheric
pressure
Место публикации
: Fullerenes Nanotubes and Carbon Nanostructures: Marcel Dekker Inc., 2007. - Т. 15, № 5. - С. 395-400. - ISSN 1536-383X,
DOI
10.1080/15363830701512229. - ISSN 1536-4046(eissn)
ГРНТИ
: 31
РИНЦ
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14.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Barinov G. I., Babkin Y. V.
Заглавие
: Influence of high-
pressure
thermal-treatment on the phase compound and phase-transformation kinetics of a system magnetite-wustite
Место публикации
: Izvestiya vysshikh uchebnykh zavedenii Fizika. - 1990. - Vol. 33, Is. 5. - P.95-96. - ISSN 0021-3411; \b Russian Physics Journal; \b Известия высших учебных заведений. Физика
Примечания
: Cited References: 4
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15.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Gorev M. V., Flerov I. N., Bogdanov E. V., Voronov V. N., Laptash N. M.
Заглавие
: Barocaloric effect near the structural phase transition in the Rb2KTiOF5 oxyfluoride
Коллективы
:
Место публикации
: Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2010. - Vol. 52, Is. 2. - P377-383. - ISSN 1063-7834,
DOI
10.1134/S1063783410020253
Примечания
: Cited References: 21. - This study was supported by the Siberian Branch of the Russian Academy of Sciences (Interdisciplinary Integration Project no. 34), the Russian Foundation for Basic Research and the Krasnoyarsk Regional Scientific Foundation within the framework of the "Sibir'" Project (project no. 09-02-98001), and the Council on Grants from the President of the Russian Federation for Support of the Leading Scientific Schools of the Russian Federation (grant no. NSh-1011.2008.2).
Предметные рубрики:
HEAT-CAPACITY
PRESSURE
Аннотация:
The barocaloric effect (BCE) in the oxyfluoride Rb2KTiOF5 has been studied in the vicinity of the structural phase transition at a temperature of 215 K in the
pressure
range 0-0.6 GPa. It has been established that the extensive and intensive barocaloric effects are Delta S-BCE similar to -46 J/kg K and Delta T (AD) similar to 18 K, respectively, over a wide temperature range 215-280 K. The studies performed have shown that the external hydrostatic
pressure
is a very effective tool for changing the entropy and temperature of the crystals which undergo structural phase transitions accompanied by a large change in the entropy.
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16.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Begunovich L. V., Korshunov M. M., Ovchinnikov S. G.
Заглавие
: Magnetic collapse in Fe3Se4 under high
pressure
Место публикации
: Materials. - 2022. - Vol. 15, Is. 13. - Ст.4583. - ISSN 19961944 (ISSN),
DOI
10.3390/ma15134583
Примечания
: Cited References: 27. - L.V.B. and S.G.O. acknowledge the support of the Russian Science Foundation (Project 18-12-00022Π). We acknowledge the useful discussions with M.A. Vysotin. L.V.B. would like to thank the Information Technology Center, Novosibirsk State University, for providing access to their supercomputer facilities
Аннотация:
Electronic structure and magnetic properties of Fe3Se4 are calculated using the density functional approach. Due to the metallic properties, magnetic moments of the iron atoms in two nonequivalent positions in the unit cell are different from ionic values for Fe3+ and Fe2+ and are equal to M1=2.071μB and M2=−2.042μB, making the system ferrimagnetic. The total magnetic moment for the unit cell is 2.135μB. Under isotropic compression, the total magnetic moment decreases non-monotonically and correlates with the non-monotonic dependence of the density of states at the Fermi level N(EF). For 7% compression, the magnetic order changes from the ferrimagnetic to the ferromagnetic. At 14% compression, the magnetic order disappears and the total magnetic moment becomes zero, leaving the system in a paramagnetic state. This compression corresponds to the
pressure
of 114 GPa. The magnetic ordering changes faster upon application of an isotropic external
pressure
due to the sizeable anisotropy of the chemical bondings in Fe3Se4. The ferrimagnetic and paramagnetic states occur under pressures of 5.0 and 8.0 GPa, respectively. The system remains in the metallic state for all values of compression.
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17.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Bulgakov E. N., Pichugin K. N., Sadreev A. F.
Заглавие
: Resonant binding of dielectric particles to a metal surface without plasmonics
Коллективы
: Russian Foundation for Basic Research ProjectRussian Foundation for Basic Research (RFBR) [19-02-00055]
Место публикации
: Phys. Rev. A. - 2021. - Vol. 103, Is. 5. - Ст.L051501. - ISSN 2469-9926,
DOI
10.1103/PhysRevA.103.L051501. - ISSN 2469-9934(eISSN)
Примечания
: Cited References: 36. - The work was supported by Russian Foundation for Basic Research Project No. 19-02-00055
Предметные рубрики:
RADIATION
PRESSURE
OPTICAL BINDING
FORCES
MANIPULATION
Аннотация:
A high index dielectric spherical particle supports the high-Q resonant Mie modes that result in a regular series of sharp resonances in the radiation
pressure
. The presence of a perfectly conducting metal surface transforms the Mie modes into extremely high-Q magnetic bonding or electric antibonding modes for the close approach of a sphere to a surface. We show that an electromagnetic plane wave with normal incidence results in repulsive or attractive resonant optical forces relative to a metal for the excitation of electric bonding or magnetic antibonding resonant modes, respectively. A magnitude of resonant optical forces reaches the order of 1 nN of magnitude for micron-sized silicon particles and a power of light 1mW/μm2 that exceeds the gravitational force by four orders. However, what is the most remarkable is there are steady positions for a sphere between the pulling and pushing forces that give rise to the resonant binding of the sphere to a metal surface.
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18.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Aleksandrov K. S., Turchin P. P., Sorokin B. P., Karpovich A. A., Nefedov V. A.
Заглавие
: Bulk acoustic waves propagation in Li2B4O7 piezoelectric crystals under the static uniaxial mechanical
pressure
Коллективы
: Annual frequency control symposium
Место публикации
: Proceedings of the Annual IEEE International Frequency Control Symposium/ Annual frequency control symposium (54 ; 2000 ; Jun. ; 7-9 ; Kansas, MO). - 2000. - P.214-217. - ISBN 01616404
Примечания
: Cited References: 8
Ключевые слова
(''Своб.индексиров.''): acoustic wave transmission--acoustic wave velocity--elasticity--lithium compounds--mathematical models--permittivity--piezoelectricity--
pressure
effects--single crystals--electromechanical constants--piezoelectric crystal--piezoelectric materials
Аннотация:
The influence of uniaxial mechanical stresses on bulk acoustic waves velocity in piezoelectric crystals Li2B4O7 has been investigated. Electromechanical constants have determined.
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19.
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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20.
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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