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1.
Improving corrosion resistance
of Cu-Al-based anodes in KF-AlF3-Al2O3 melts / S. K. Padamata, A. Yasinskiy, A. Shabanov [et al.]> // Trans. Nonferrous Met. Soc. China. - 2022. -
Vol. 32
,
Is. 1
. - P. 354-363,
DOI
10.1016/S1003-6326(22)65800-X. - Cited References: 24. - The work is performed as a part of the State Assignment for the Science of Siberian Federal University, Russia (No. FSRZ-2020-0013) . Use of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS" is acknowledged . - ISSN 1003-6326. - ISSN 2210-3384
РУБ
Metallurgy & Metallurgical Engineering
Рубрики:
NI-FE
ALUMINUM ELECTROLYSIS
INERT ANODES
NICKEL FERRITE
BEHAVIOR
Кл.слова (ненормированные):
inert anodes
--
potassium cryolite
--
Cu-Al alloys
--
corrosion
--
aluminium electrolysis
--
oxygen-evolving electrodes
Аннотация:
The anodic behaviour of pre-oxidised and non-oxidised Cu−Al-based anodes (Cu−10Al and Cu−9.8Al−2Mn) in KF−AlF3−Al2O3 melts was studied through galvanostatic and potentiodynamic polarization techniques. The alloy compositions were oxidised for a short-term (8 h) at 700 °C, followed by galvanostatic polarization for 1 h at 800 °C with an applied current density of 0.4 A/cm2. The potentiodynamic curves were recorded with a sweep rate of 0.01 V/s. XRD analysis was conducted on frozen melt samples collected on the surface of the anode, and SEM observation was performed on the anode after the experiment to study the phases of the scales formed on the alloys. All the anode materials had a steady potential between 2.30 and 2.50 V(vs Al/AlF3). The corrosion rates of the anodes were calculated from the data acquired through potentiodynamic polarization. It was seen that pre-oxidised anodes possess a low corrosion rate compared to those without pre-oxidation treatment.
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Держатели документа:
Siberian Fed Univ, Lab Phys & Chem Met Proc & Mat, Krasnoyarsk, Russia.
Krasnoyarsk Sci Ctr SB RAS, Lab Mol Spect, Krasnoyarsk, Russia.
Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China.
Доп.точки доступа:
Padamata, Sai Krishna; Yasinskiy, A.; Shabanov, A. V.; Шабанов, Александр Васильевич; Bermeshev, T.; Yang, Y. J.; Wang, Z. W.; Cao, D.; Polyakov, P.; State Assignment for the Science of Siberian Federal University, Russia [FSRZ-2020-0013]
}
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2.
Interplay of magnetic
and superconducting subsystems in Ho-doped YBCO / D. M. Gokhfeld, S. V. Semenov, K. Y. Terentyev [et al.]> // J. Supercond. Nov. Magn. - 2021. -
Vol. 34
. Is. 10. - P. 2537-2543,
DOI
10.1007/s10948-021-05954-3. - Cited References: 26. - This work was supported by the Russian Foundation for Basic Research and the Government of the Krasnoyarsk Territory, Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project "Superconducting properties of YBCO incorporated by paramagnetic rare-earth elements" No. 20-42-240008 . - ISSN 1557-1939. - ISSN 1557-1947
РУБ
Physics, Applied + Physics, Condensed Matter
Рубрики:
TEMPERATURE
TRANSPORT
PEAK
DY
SUSCEPTIBILITY
TRANSITION
BEHAVIOR
Кл.слова (ненормированные):
Peak effect
--
Bulk superconductors
--
Critical current
--
Pinning
--
X-ray diffraction
--
YBCO
--
Doping
--
Paramagnetic magnetization
Аннотация:
Superconducting and paramagnetic contributions to the magnetization of polycrystalline Y1−xHoxBa2Cu3O7−δ samples were investigated. The superconductivity is responsible for a partial screening of magnetic ions from an external magnetic field and for a possible sinking of antiferromagnetic correlations between these ions. Magnetic moments of Ho ions influence on a peak effect induced by the order–disorder transition of the Abrikosov vortex lattice. The critical current density and the critical temperature of YBCO are not changed by the Ho doping.
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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Доп.точки доступа:
Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Semenov, S. V.; Семёнов, Сергей Васильевич; Terentyev, K. Yu.; Терентьев, Константин Юрьевич; Yakimov, I. S.; Balaev, D. A.; Балаев, Дмитрий Александрович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk Territory, Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project "Superconducting properties of YBCO incorporated by paramagnetic rare-earth elements" [20-42-240008]
}
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3.
Паршин, Александр Михайлович
.
Отклик гибридно-упорядоченного нематика с поверхностной линией дисклинации на импульс магнитного поля / А. М. Паршин> // Жидк. кристаллы и их практич. использ. - 2021. -
Т. 21
,
№ 3
. - С. 60-67 ; Liq. Cryst. Appl.,
DOI
10.18083/LCAppl.2021.3.60. - Библиогр.: 23 . - ISSN 1991-3966. - ISSN 2499-9644
Перевод заглавия:
Response of a hybrid-aligned nematic with a surface disclination line to a magnetic field pulse
РУБ
Crystallography
Рубрики:
LIQUID-CRYSTAL
DOMAIN-STRUCTURE
INTERFERENCE
DYNAMICS
BEHAVIOR
FILM
Кл.слова (ненормированные):
нематический жидкий кристалл
--
поликарбонат
--
гибридно-упорядоченный слой
--
интерференция света
--
рассеяние света
--
импульсное магнитное поле
--
nematic liquid crystal
--
polycarbonate
--
domain structure
--
light interference
--
light scattering
--
magnetic field
Аннотация:
Исследовано оптическое пропускание гибридно-упорядоченного нематического слоя с поверхностной линией дисклинации, деформированного импульсным магнитным полем. Получены выражения для времен реакции на полевое воздействие и релаксации жидкого кристалла к недеформированному состоянию. Время реакции оказалось существенно больше расчетного значения и сопоставимым с длительностью импульса магнитного поля. Выведены зависимости интенсивности света от разности фаз между обыкновенным и необыкновенным лучами с учетом рассеяния. Для процесса релаксации получено хорошее совпадение экспериментальной и расчетной временных зависимостей интенсивности лазерного излучения, прошедшего через весь слой жидкого кристалла, за исключением тонкого переходного приповерхностного слоя. Аномалия хода кривой релаксации в переходном слое рассмотрена в рамках известных модельных представлений.
The optical transmission of a hybrid-ordered nematic layer with a surface disclination line, strained by a pulsed magnetic field, is studied. The expressions for the reaction times to the field action and relaxation of a liquid crystal to an untrained state are obtained. The experimental reaction time turned out to be significantly longer than its calculated value and comparable to the magnetic field pulse duration. The light intensity dependences on the phase difference between the ordinary and extraordinary rays, taking into account scattering are derived. For the relaxation process, good agreement is obtained between the experimental and calculated time dependences of the laser radiation intensity transmitted through the entire liquid crystal layer, with the exception of a thin transitional near-surface layer. The anomaly in the course of the relaxation curve run in the transition layer is considered within the framework of the known model concepts.
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Держатели документа:
Институт физики им. Л. В. Киренского, ФИЦ «Красноярский научный центр Сибирского отделения РАН», Академгородок 50, 660036 Красноярск, Россия
Сибирский Федеральный университет, пр. Свободный, д. 79, 660041 Красноярск, Россия
Доп.точки доступа:
Parshin A.M.
}
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4.
Effect of multiplicity
fluctuation in cobalt ions on crystal structure, magnetic and electrical properties of NdCoO3 and SmCoO3 / V. A. Dudnikov, Y. S. Orlov, L. A. Solovyov [et al.]> // Molecules. - 2020. -
Vol. 25
,
Is. 6
. - Ст. 1301,
DOI
10.3390/molecules25061301. - Cited References: 56. - This work is supported by the Russian Science Foundation grant 18-02-00022. . - ISSN 1420-3049
РУБ
Biochemistry & Molecular Biology + Chemistry, Multidisciplinary
Рубрики:
SPIN-STATE TRANSITIONS
CO3+ ION
CONDUCTIVITY
TEMPERATURE
BEHAVIOR
Кл.слова (ненормированные):
rare-earth cobalt oxides
--
multiplicity fluctuations
--
structural
--
magnetic
--
electrical
--
and dilatation properties
Аннотация:
The structural, magnetic, electrical, and dilatation properties of the rare-earth NdCoO3 and SmCoO3 cobaltites were investigated. Their comparative analysis was carried out and the effect of multiplicity fluctuations on physical properties of the studied cobaltites was considered. Correlations between the spin state change of cobalt ions and the temperature dependence anomalies of the lattice parameters, magnetic susceptibility, volume thermal expansion coefficient, and electrical resistance have been revealed. A comparison of the results with well-studied GdCoO3 allows one to single out both the general tendencies inherent in all rare-earth cobaltites taking into account the lanthanide contraction and peculiar properties of the samples containing Nd and Sm.
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Держатели документа:
RAS, Kirensky Inst Phys, Fed Res Ctr KSC, SB, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
RAS, Fed Res Ctr KSC, Inst Chem & Chem Technol, SB, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Lebedev Phys Inst, Moscow 119991, Russia.
Russian Acad Sci, Ioffe Inst, St Petersburg 194021, Russia.
Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Solovyov, Leonid A.; Vereshchagin, Sergey N.; Gavrilkin, Sergey Yu.; Tsvetkov, Alexey Yu.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Gorev, M. V.; Горев, Михаил Васильевич; Novikov, Sergey V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Science FoundationRussian Science Foundation (RSF) [18-02-00022]
}
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5.
Experimental observation of
a symmetry-protected bound state in the continuum in a chain of dielectric disks / Z. F. Sadrieva [et al.]> // Phys. Rev. A. - 2019. -
Vol. 99
,
Is. 5
. - Ст. 053804,
DOI
10.1103/PhysRevA.99.053804. - Cited References:61. - The numerical simulations and experimental part of this work were supported by the Russian Science Foundation (Grant No. 17-12-01581), and the analytical calculations were supported by RFBR (Grant No. 18-32-20205) and the Ministry of Education and Science of the Russian Federation (3.1668.2017/4.6). The authors are thankful to Andrey Sayanskiy for assistance in the holder fabrication. A.A.B. and Z.F.S. acknowledge the Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS" for valuable financial support. . - ISSN 2469-9926. - ISSN 2469-9934
РУБ
Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
LIGHT
RESONANCES
RADIATION
MOMENTUM
BEHAVIOR
LAYER
Аннотация:
The existence of bound states in the continuum (BIC) manifests a general wave phenomenon first predicted in quantum mechanics by John von Neumann and Eugene Wigner [J. von Neumann and E. Wigner, Phys. Z. 30, 465 (1929)]. Today it is being actively explored in photonics, radiophysics, acoustics, and hydrodynamics. We report an experimental observation of an electromagnetic bound state in the radiation continuum in a one-dimensional array of dielectric particles. By measurement of the transmission spectra of the ceramic disk chain at GHz frequencies, we demonstrate how a resonant state in the vicinity of the center of the Brillouin zone turns into a symmetry-protected BIC with increase in the number of the disks. We estimate a number of the disks when the radiation losses become negligible in comparison to material absorption and, therefore, the chain could be considered practically as infinite. The presented analysis is supplemented by measurements of the near fields of the symmetry-protected BIC. All measurements are in a good agreement with the results of the numerical simulation and analytical model based on a tight-binding approximation. The obtained results provide useful guidelines for practical implementations of structures with bound states in the continuum that opens up horizons for the development of optical and radio-frequency metadevices.
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Держатели документа:
ITMO Univ, Dept Nanophoton & Metamat, St Petersburg 197101, Russia.
Ceram Co Ltd, Giricond Res Inst, St Petersburg 194223, Russia.
RAS, SB, KSC, Kirensky Inst Phys Fed Res Ctr, Krasnoyarsk 660036, Russia.
Ioffe Inst, St Petersburg 194021, Russia.
Доп.точки доступа:
Sadrieva, Z. F.; Belyakov, M. A.; Balezin, M. A.; Kapitanova, P. V.; Nenasheva, E. A.; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Bogdanov, A. A.; Russian Science Foundation [17-12-01581]; RFBR [18-32-20205]; Ministry of Education and Science of the Russian Federation [3.1668.2017/4.6]; Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS"
}
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6.
Thermal expansion and
polarization of (1-x)PNN-xPT solid solutions / M. V. Gorev [et al.]> // Integr. Ferroelectr. - 2019. -
Vol. 196
,
Is. 1
. - P. 60-63,
DOI
10.1080/10584587.2019.1591957. - Cited References: 6 . - ISSN 1058-4587. - ISSN 1607-8489
Перевод заглавия:
Тепловое расширение и поляризация твердых растворов (1-x)PNN-xPT
РУБ
Engineering, Electrical & Electronic + Physics, Applied + Physics, Condensed Matter
Рубрики:
BEHAVIOR
Кл.слова (ненормированные):
thermal expansion
--
polarization
--
relaxors
--
perovskites
Аннотация:
The paper presents the results of detailed studies of the thermal expansion of (1-x)he paper presents the results of detailed studies of the thermal expansion of (1-x)PbNi1/3Nb2/3O3-xPbTiO3 solid solutions with x = 0-0.8. The anomalous and lattice contributions to deformation and the thermal expansion coefficient are analyzed and the mean square polarization Pd is determined. The results obtained are discussed within the framework of the thermodynamic theory and the Landau 2-4-6 coefficients for solid solutions are estimated.
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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.
Siberian Fed Univ, Inst Phys & Radioelect, Krasnoyarsk, Russia.
Univ Latvia, Inst Solid State Phys, LV-1063 Riga, Latvia.
Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Bormanis, K.; Kalvane, A.; International Scientific Conference on Functional Materials and Nanotechnologies(12 ; 2018 ; Oct. 02-05 ; Riga, Latvia)
}
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7.
Markevich, I. A.
Impedance Spectroscopy Study of a Polymer Composite with Carbon Nanotubes in Contact with an Electrolyte / I. A. Markevich, N. A. Drokin, G. E. Selyutin> // Tech. Phys. - 2019. -
Vol. 64
,
Is. 9
. - P. 1324-1329,
DOI
10.1134/S1063784219090093. - Cited References: 14 . - ISSN 1063-7842. - ISSN 1090-6525
РУБ
Physics, Applied
Рубрики:
BEHAVIOR
CONDUCTIVITY
RELAXATION
Кл.слова (ненормированные):
impedance spectroscopy
--
nanotubes
--
electrolyte
Аннотация:
The measured frequency dependence of the electric impedance of a composite based on ultra-high molecular weight polyethylene reinforced with carbon nanotubes in contact with an electrolyte is presented. The
behavior
of the active and reactive impedance components, permittivity, and conductivity in the frequency range from 0.1 Hz to 120 MHz is analyzed. An equivalent electric circuit simulating the dispersion of the impedance of the polymer composite making contact with the electrolyte is proposed. The formation of a double electric layer at the interface between the polymer composite and electrolyte layer is demonstrated and the electrical characteristics of this layer are determined.
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Публикация на русском языке
Маркевич И. А. Исследование методом импедансной спектроскопии полимерного композита с углеродными нанотрубками в контакте с электролитом [Текст] / И. А. Маркевич, Н. А. Дрокин, Г. Е. Селютин // Журн. техн. физ. - 2019. - Т. 89 Вып. 9. - С. 1400-1405
Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Selyutin, G. E.
}
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8.
Bulgakov, E. N.
Propagating Bloch bound states with orbital angular momentum above the light line in the array of dielectric spheres / E. N. Bulgakov, A. F. Sadreev> // J. Opt. Soc. Am. A. - 2017. -
Vol. 34
,
Is. 6
. - P. 949-952,
DOI
10.1364/JOSAA.34.000949. - Cited References:37. - Ministry of Education and Science of the Russian Federation (Minobrnauka) (N 3.1845.2017); Russian Foundation for Basic Research (RFBR) (16-02-00314). . - ISSN 1084-7529. - ISSN 1520-8532
РУБ
Optics
Рубрики:
GUIDED-WAVES
CONTINUUM
BEHAVIOR
GRATINGS
Аннотация:
We present propagating Bloch bound states in the radiation continuum with orbital angular momentum in an infinite linear periodical array of dielectric spheres. The bound states in the continuum demonstrate a giant Poynting vector spiraling around the array. They can be excited by a plane wave with incident linear polarization with a small tilt relative to the axis of the array.
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Держатели документа:
RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia.
Siberian State Aerosp Univ, Krasnoyarsk, Russia.
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Ministry of Education and Science of the Russian Federation (Minobrnauka) [N 3.1845.2017]; Russian Foundation for Basic Research (RFBR) [16-02-00314]
}
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9.
Near-zero thermal expansion
and high ultraviolet transparency in a borate crystal of Zn4B6O13 / X. X. Jiang [et al.]> // Adv. Mater. - 2016. -
Vol. 28
,
Is. 36
. - P. 7936-7940,
DOI
10.1002/adma.201601816. - Cited References:38. - The authors acknowledge Zhuohong Yin for useful discussion and Dr. Siyang Luo for the help in crystal fabrication. This work was supported by the Special Foundation of the Director of Technical Institute of Physics and Chemistry (TIPC), the National Scientific Foundations of China (Grant 11474292 and 51401224), and China "863" project (No. 2015AA034203). . - ISSN 0935-9648. - ISSN 1521-4095
Перевод заглавия:
Нулевое тепловое расширение и высокая ультрафиолетовая прозрачность в борате Zn4B6O13
РУБ
Chemistry, Multidisciplinary + Chemistry, Physical + Nanoscience
Рубрики:
ZN4O(BO2)6
TETRAHEDRA
BEHAVIOR
RANGE
Аннотация:
Intrinsic isotropic near-zero thermal expansion is discovered in borate crystal Zn4B6O13 with high transparency in the ultraviolet region. First-principles calculations demonstrate that the very low thermal expansion originates mainly from the invariability of the solid [B24O48] truncated octahedra that are fixed by the [Zn4O13] clusters in the ZBO structure.
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Держатели документа:
Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Funct Crystals & Laser Technol, Ctr Crystal R&D, Beijing 100190, Peoples R China.
Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
RAS, Lab Crystal Phys, Kirensky Inst Phys, SB, Krasnoyarsk 660036, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing 100190, Peoples R China.
Chinese Acad Sci, Fujian Inst Res Struct Matter, Fuzhou 350002, Fujian, Peoples R China.
Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China.
Univ Sci & Technol Beijing, Dept Phys Chem, Beijing 100083, Peoples R China.
Доп.точки доступа:
Jiang, Xingxing; Molokeev, M. S.; Молокеев, Максим Сергеевич; Gong, Pifu; Yang, Y.i.; Wang, Wei; Wang, Shuaihua; Wu, Shaofan; Wang, Yingxia; Huang, Rongjin; Li, Laifeng; Wu, Yicheng; Xing, Xianran; Lin, Zheshuai; Special Foundation of the Director of Technical Institute of Physics and Chemistry (TIPC); National Scientific Foundations of China [11474292, 51401224]; China "863" project [2015AA034203]
}
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10.
Low-temperature structural and
magnetic phase transitions in multiferroic GdFe3(BO3)4 / K. V. Frolov [et al.]> // J. Alloys Compd. - 2016. -
Vol. 671
. - P. 545-551,
DOI
10.1016/j.jallcom.2016.02.083. - Cited References:36. - We thank Dr. A.P. Dudka for help in the low temperature XRD measurements. This study was supported in part by the Russian Foundation for Basic Research (projects # 14-02-00483a and 13-02-12442), and the Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools (grant # NSh-1130.2014.5 and # NSh-924.2014.2). This work was performed using the equipment of the Shared Research Center IC RAS and was supported by the Russian Ministry of Education and Science (project RFMEFI62114X0005). . - ISSN 0925-8388. - ISSN 1873-4669
Перевод заглавия:
Низкотемпературные структурные и магнитные фазовые переходы в мультиферроике GdFe3(BO3)4
РУБ
Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
IRON BORATE GDFE3(BO3)4
BIFEO3 THIN-FILMS
MAGNETOELASTIC PROPERTIES
RM3(BO3)4 CRYSTALS
TRIGONAL GDFE3(BO3)4
ENHANCED POLARIZATION
HIGH-PRESSURES
CRYSTALLIZATION
BEHAVIOR
GROWTH
Кл.слова (ненормированные):
Multiferroics
--
Rare earth compounds
--
X-ray diffraction
--
Mossbauer
--
spectroscopy
--
Crystal structure
--
Spin dynamics
Аннотация:
X-ray analysis revealed that at temperature decreasing from room temperature to Tstr = 155 K the crystal unit cell GdFe3(BO3)4 is reduced only along the c axis (at 0.01 Å), while the a and b axes are unchanged within the error limits. The volume of the crystal decreases uniformly in the direction of all three axes at 155–80 K. At 80–30 K the crystal volume is decreased only by reduction of the parameters a and b, while the parameter c increases conversely. In the paramagnetic region Mössbauer spectra do not distinguish between the two structural positions of iron ions Fe1 and Fe2, appearing at T < Tstr. Below the temperature of the magnetic phase transition at TN = 38.0(1) K the Mössbauer data indicate quasi-one-dimensional magnetic ordering of iron moments in the sublattice Fe2 and a two-dimensional one in the iron sublattice Fe1. The dynamics of spin reorientation in sublattices Fe1 and Fe2 is studied in detail.
Рентгеновский анализ показал, что при уменьшении температуры от комнатной до Tstr = 155 K изменение параметра элементарной ячейки кристалла GdFe3(BO3)4 происходит лишь вдоль оси с (при 0,01 Å), в то время как а и b оси остаются неизменными в пределах погрешности измерений. Объем кристалла уменьшается равномерно в направлении всех трех осей при 155-80 K. При 80-30 K объем кристалла уменьшается только уменьшением параметров a и b, в то время как параметр с наоборот увеличивается. В парамагнитной области Мессбауэровские спектры не различают двух структурных позиций ионов железа Fe1 и Fe2, появляющиеся при Т˂Tstr. Ниже температуры магнитного фазового перехода при TN = 38,0(1) К Мёссбауэрские данные указывают на квази-одномерный магнитное упорядочение моментов железа в подрешетке Fe2 и двумерное в железной подрешетке Fe1. Динамика спиновой переориентации в подрешетках Fe1 и Fe2 подробно изучается.
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Держатели документа:
Russian Acad Sci, AV Shubnikov Crystallog Inst, Moscow 119333, Russia.
Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA.
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Frolov, K. V.; Lyubutin, I. S.; Smirnova, E. S.; Alekseeva, O. A.; Verin, I. A.; Artemov, V. V.; Kharlamova, S. A.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Russian Foundation for Basic Research [14-02-00483a, 13-02-12442]; Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools [NSh-1130.2014.5, NSh-924.2014.2]; Russian Ministry of Education and Science [RFMEFI62114X0005]
}
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11.
Lundin, A. A.
Order dependence of the profile of the intensities of multiple-quantum coherences / A. A. Lundin, V. E. Zobov> // J. Exp. Theor. Phys. - 2015. -
Vol. 120
,
Is. 5
. - P. 762-771,
DOI
10.1134/S1063776115040093. - Cited References:62 . - ISSN 1063. - ISSN 1090-6509. -
РУБ
Physics, Multidisciplinary
Рубрики:
PARAMAGNETIC SPIN SYSTEMS
FREE-INDUCTION DECAY
NMR-SPECTRA
AUTOCORRELATION FUNCTIONS
FLUCTUATION SPECTRUM
TEMPERATURE DYNAMICS
LINE-SHAPE
SOLIDS
IRREVERSIBILITY
BEHAVIOR
Аннотация:
A modification of the widespread phenomenological model theory of multiple-quantum (MQ) nuclear magnetic resonance spectra of a single cluster of correlated spins has been developed. In contrast to the mentioned theory, the size distribution of such clusters has been consistently taken into account. To obtain the distribution, solutions for the amplitudes of the expansion in the complete set of orthogonal operators are used. Expressions specifying the dependence of the profile of the intensities of MQ coherences on their number n (order) have been obtained. The total form of the dependence has been evaluated by means of the numerical implementation of the resulting expressions. The asymptotic expressions for large n values (wings of the spectrum) have been obtained analytically by the saddle-point method. It has been shown that the dependence under study has a Gaussian central part and exponential wings. The results obtained are in agreement with the previous calculations for some model systems and existing experimental data.
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Публикация на русском языке
Лундин, Андрей Арнольдович. Зависимость профиля интенсивностей многоквантовых когерентностей от порядков [Текст] / А. А. Лундин, В. Е. Зобов // Журн. эксперим. и теор. физ. : Наука, 2015. - Т. 147 Вып. 5. - С. 885-895
Держатели документа:
Russian Acad Sci, Semenov Inst Chem Phys, Moscow 117977, Russia.
Russian Acad Sci, Akademgorodok, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Zobov, V. E.; Зобов, Владимир Евгеньевич
}
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12.
Aver'yanov, E. M.
New features of a smectic-A-crystal-B phase transition in a homologous series of liquid crystals / E. M. Aver'yanov> // JETP Letters. - 2014. -
Vol. 99
,
Is. 3
. - P. 158-163,
DOI
10.1134/S0021364014030047. - Cited References: 21 . - ISSN 0021-3640. - ISSN 1090-6487
РУБ
Physics, Multidisciplinary
Рубрики:
POLARIZABILITY
POLYMORPHISM
ANISOTROPY
MOLECULES
BEHAVIOR
Аннотация:
The components L j of the Lorentz tensor and the polarizability density of molecules G in the smectic-A and crystalline-B phases have been determined for homologues of the series of alkyl-p-(4-alkoxybenzylideneamino-)cinnamates. The quantity L j (G) in both phases is a linear (quadratic) function of the orientational order parameter of molecules S, which is invariant (noninvariant) with respect to the A-B transition, which is manifested in the form of jumps δL j and δG and enhancement of the G(S) dependence. An increase in the length of terminal molecular chains and weakening of interlayer correlation of molecules are accompanied by strengthening of the A-B transition of the first order and G(S) dependences in both phases together with an increase in δL j and δG. Change δG and dependence G(S) in the B phase are related to change in the conformation (flattening) of aromatic molecular cores.
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Публикация на русском языке
Аверьянов, Евгений Михайлович. Новые особенности фазового перехода смектик-A-кристалл-B в гомологическом ряду жидких кристаллов [Текст] / Е. М. Аверьянов // Письма в Журн. эксперим. и теор. физ. : Наука, 2014. - Т. 99 Вып. 3-4. - С. 179-184
Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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13.
Synthesis and magnetic
states of cobalt in three-layer Co/Ge/Co films / G. S. Patrin [et al.]> // Phys. Solid State. - 2014. -
Vol. 56
,
Is. 2
. - P. 302-309,
DOI
10.1134/S1063783414020255. - Cited References: 13. - This study was supported by the Russian Foundation for Basic Research (project no. 11-02-00675-a). . - ISSN 1063-7834. - ISSN 1090-6460
РУБ
Physics, Condensed Matter
Рубрики:
FERROMAGNETIC LAYER THICKNESS
NANOSTRUCTURES
BEHAVIOR
SPACER
Аннотация:
The magnetic properties of three-layer Co-Ge magnetic films have been studied experimentally as a function of technological conditions of their deposition. It has been found that the films deposited at a high deposition rate have a granular structure, and the films obtained at a low deposition rate have an X-ray amorphous structure. Electron microscopy and nuclear magnetic resonance studies have demonstrated that, at the same cobalt layer thickness, the semiconductor granule sizes depend on the average semiconductor layer thickness and correlate with the formation of different cobalt phases (amorphous, cubic, and hexagonal). The thermomagnetic properties of the films have been investigated. © 2014 Pleiades Publishing, Ltd.
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Публикация на русском языке
Синтез и магнитные состояния кобальта в трехслойных пленках Co/Ge/Co [] / Г. С. Патрин [и др.] // Физ. тверд. тела : ФТИ РАН, 2014. - Т. 56 Вып. 2. - С. 301-307
Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660074, Russia
Доп.точки доступа:
Patrin, G. S.; Патрин, Геннадий Семёнович; Turpanov, I. A.; Турпанов, Игорь Александрович; Kobyakov, A. V.; Кобяков, Александр Васильевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Patrin, K. G.; Патрин, Константин Геннадьевич; Li, L. A.; Ли, Людмила Алексеевна; Maltsev, V. K.; Мальцев, Вадим Константинович; Zharkov, S. M.; Жарков, Сергей Михайлович; Yushkov, V. I.; Юшков, Василий Иванович
}
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14.
Balaev, D. A.
Correlation between magnetoresistance and magnetization hysteresis in a granular high-T C superconductor: Impact of flux compression in the intergrain medium / D. A. Balaev, S. V. Semenov, M. I. Petrov> // J. Supercond. Nov. Magn. - 2014. -
Vol. 27
,
Is. 6
. - P. 1425-1429,
DOI
10.1007/s10948-014-2491-6. - Cited References: 27 . - ISSN 1557-1939. - ISSN 1557-1947
РУБ
Physics, Applied + Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTOR
JOSEPHSON MEDIUM
CRITICAL-STATE
YBA2CU3O7-DELTA
FIELDS
BEHAVIOR
HTSC
COMPOSITES
RESISTANCE
MOTION
Кл.слова (ненормированные):
Granular superconductor
--
Josephson medium
--
Effective field
--
Magnetoresistance
--
Magnetization hysteresis
Аннотация:
The correlation between experimental magnetic field dependences of magnetoresistance and magnetization hysteresis in granular YBa2Cu3O7 is established. Within the proposed approach, magnetoresistance is assumed to be determined by the effective field in the intergrain boundaries the ensemble of which is considered to be a Josephson medium. The effective field in the intergrain medium can be written in the form B (eff)(H)=H-4 pi M(H)x alpha, where alpha is the parameter of averaged demagnetizing factors of grains and the degree of flux compression. A comparison of experimental magnetoresistance R(H) and magnetization M(H) hysteresis dependences obtained at different external magnetic field sweep rates yields the value alpha similar to 10, which is caused by the flux compression between grains. The proposed model describes well most of the features of the magnetoresistance hysteresis in granular high-T (C) superconductors.
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Доп.точки доступа:
Semenov, S. V.; Семёнов, Сергей Васильевич; Petrov, M. I.; Петров, Михаил Иванович; Балаев, Дмитрий Александрович
}
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15.
Studies of ferroelectric
and magnetic phase transitions in multiferroic PbFe0.5Ta0.5O3-PbTiO3 solid solution ceramics / I. P. Raevski [et al.]> // J. Mater. Sci. - 2014. -
Vol. 49
,
Is. 18
. - P. 6459-6466,
DOI
10.1007/s10853-014-8376-z. - 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. . - ISSN 0022-2461. - ISSN 1573-4803
РУБ
Materials Science, Multidisciplinary
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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Держатели документа:
Southern Fed Univ, Fac Phys, Rostov Na Donu 344090, Russia
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
Univ Macau, Fac Sci & Technol, Taipa, Peoples R China
Natl Taiwan Univ Sci & Technol, Taipei 106, Taiwan
Доп.точки доступа:
Raevski, I. P.; Titov, V. V.; Malitskaya, M. A.; Eremin, E. V.; Еремин, Евгений Владимирович; Kubrin, S. P.; Blazhevich, A. V.; Chen, H.; Chou, C.-C.; Raevskaya, S. I.; Zakharchenko, I. N.; Sarychev, D. A.; Shevtsova, S. I.; Russian Foundation for Basic Research (RFBR) [12-08-00887_a]; Research Committee of the University of Macau
}
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16.
Direct and inverse
magnetoelectric effects in HoAl3(BO3)4 single crystal / A. L. Freydman [et al.]> // J. Appl. Phys. - 2014. -
Vol. 115
,
Is. 17
. - Ст. 174103,
DOI
10.1063/1.4874270. - Cited References: 34. - This work was supported by Russian Foundation for Basic Research (Project Nos. 13-02-12442ofi_m2 and 14-02-00307). The authors are grateful to V. N. Ilyushchenko for the help in preparing of this manuscript. . - ISSN 0021-8979. - ISSN 1089-7550
РУБ
Physics, Applied
Рубрики:
POLARIZATION
BEHAVIOR
ORDER
Аннотация:
The direct (MEH-) and inverse (MEE-) magnetoelectric effects in the HoAl3(BO3)4 single crystal are studied. Temperature and magnetic field dependences of permittivity of the crystal are investigated. A relation between the investigated effects was established. It was found that the magnetoelectric effect can exist in crystals without magnetic order or spontaneous polarization. It was shown that the phenomena investigated are due to magnetostriction or magnetoelastic effect. The thermodynamic potential was considered for describing magnetoelectric effect at low magnetic fields. The results obtained are explained within a proposed qualitative microscopic model, based on interplay of configuration of 4f- electron subshell of the rare-earth element and applied magnetic or electric field.
Изучаются прямой (MEH-) и обратный (МЭА-) магнитоэлектрические эффекты в монокристалле HoAl3(BO3)4 . Зависимости диэлектрической проницаемости кристалла от температуры и магнитного поля исследованы. Была создана связь между исследованными эффектами. Было обнаружено, что магнитоэлектрический эффект может существовать в кристаллах без магнитного порядка или спонтанной поляризации. Было показано, что исследуемые явления происходят из-за магнитострикции или магнитоупругого эффекта. Термодинамический потенциал рассчитывался для описания магнитоэлектрический эффект в слабых магнитных полях. Полученные результаты объясняются в рамках предложенной качественной микроскопической модели, основанной на взаимодействии конфигурации 4f-электронов в подоболочке редкоземельного элемента и внешнего магнитного или электрического поля.
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Доп.точки доступа:
Freydman, A. L.; Фрейдман, Александр Леонидович; Balaev, A. D.; Балаев, Александр Дмитриевич; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Eremin, E. V.; Еремин, Евгений Владимирович; Temerov, V. L.; Темеров, Владислав Леонидович; Gudim, I. A.; Гудим, Ирина Анатольевна; Russian Foundation for Basic Research [13-02-12442ofi_m2, 14-02-00307]
}
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17.
Golovnev, N. N.
Enrofloxacinium citrate monohydrate: Preparation, crystal structure, thermal stability and IR-characterization / N. N. Golovnev, A. D. Vasiliev, S. D. Kirik> // J. Mol. Struct. - 2012. -
Vol. 1021
. - P. 112-117,
DOI
10.1016/j.molstruc.2012.04.059. - Cited References: 22. - The authors are grateful to the Ministry of Education and Science (Government Contracts # 02.740.11.0629) for the financial support of the investigation. . - ISSN 0022-2860
РУБ
Chemistry, Physical
Рубрики:
COCRYSTAL
ANTIBACTERIAL
BEHAVIOR
STATE
ACID
Кл.слова (ненормированные):
Enrofloxacin
--
Citric acid
--
Crystal structure
--
IR spectra
--
Thermal analysis
Аннотация:
Enrofloxacinium citrate monohydrate (I), C19H 23FN3O3+В·C6H7O7- В·H2O, [C19H22FN3O3 - enrofloxacin, EnrH] has been crystallized from the mutual solution of citric acid and enrofloxacin in ambient conditions. The colorless crystals have been investigated using X-ray single crystal and powder techniques, and characterized by differential scanning calorimetry, thermogravimetry and infrared spectroscopy. The obtained compound can be considered as a salt with enrofloxacinium in the role of a cation and citrate as an anion. The ions ratio equals to 1:1. The compound crystallizes in the triclinic lattice with a = 9.0489(8) A, b = 9.6531(8) A, c = 14.913(1) A, ? = 98.813(1)В°, ? = 92.029(1)В°, ? = 91.013(1)В°, Z = 2, V = 1286.1(2) A3, S.G. P1?. The crystal structure determination reveals the importance of inter- and intramolecular interactions in the crystal formation. The EnrH2+andH3Cit- molecular ions are packed in alternating layers with water molecules inserted into the citrate layers. A citrate ion in the layer is linked via H-bondings with two adjacent ones and three water molecules. Enrofloxacinium cations are packaged by means of a benched mode and every cation is linked by three intermolecular thymus type H-bondings with nitrogens of adjacent cations and by two links with the oxygen of the citrate ions. The infrared spectra gave the evidence of H-bonding formation in the obtained salt. The ?-stacking interactions are observed between the aromatic cycles of the adjacent cations which are located in an antiparallel style in a layer. В© 2012 Elsevier B.V. All rights reserved.
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Держатели документа:
Siberian Federal University, Svobodny Ave. 79, Krasnoyarsk 660041, Russian Federation
Kirensky Institute of Physics SB RAS, Krasnoyarsk 660036, Russian Federation
Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Vasiliev, A. D.; Васильев, Александр Дмитриевич; Kirik, S. D.; Головнёв, Николай Николаевич
}
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18.
Synthesis and structural
properties of cubic G0-Rb2KMoO3F3 oxyfluoride / V. V. Atuchin [et al.]> // Ceram. Int. - 2012. -
Vol. 38
,
Is. 3
. - P. 2455-2459,
DOI
10.1016/j.ceramint.2011.11.013. - Cited References: 23. - This study was partly supported by RFBR (Grant 09-02-00062) and SB RAS (Grant 34). . - ISSN 0272-8842
РУБ
Materials Science, Ceramics
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
Кл.слова (ненормированные):
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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Держатели документа:
[Atuchin, V. V.] SB RAS, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090 90, Russia
[Gavrilova, T. A.] SB RAS, Inst Semicond Phys, Lab Nanolithog & Nanodiagnost, Novosibirsk 630090 90, Russia
[Isaenko, L. I.
Zhurkov, S. A.] SB RAS, Inst Geol & Mineral, Lab Crystal Growth, Novosibirsk 530090 90, Russia
[Kesler, V. G.] SB RAS, Inst Semicond Phys, Lab Phys Principles Integrated Microelect, Novosibirsk 630090 90, Russia
[Molokeev, M. S.] SB RAS, Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036 36, Russia
Доп.точки доступа:
Atuchin, V. V.; Gavrilova, T. A.; Isaenko, L. I.; Kesler, V. G.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhurkov, S. A.
}
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19.
Determination of the
magnetic structure of SmFe3(BO3)4 by neutron diffraction: comparison with other RFe3(BO3)4 iron borates / C. Ritter [et al.]> // J. Phys.: Condens. Matter. - 2012. -
Vol. 24
,
Is. 38
. - Ст. 386002,
DOI
10.1088/0953-8984/24/38/386002. - Cited References: 40. - This work was supported by RFBR, grant No. 10-02-00765. . - ISSN 0953-8984
РУБ
Physics, Condensed Matter
Рубрики:
SPIN REORIENTATION
EARTH
GDFE3(BO3)4
BEHAVIOR
Аннотация:
Temperature dependent neutron diffraction studies were performed on SmFe3(BO3)4. The crystallographic structure was determined to stay as R32 over the whole studied temperature range of 2 K ‹ T ‹ 300 K. A magnetic phase transition characterized by the magnetic propagation vector κ = [0 0 3/2] takes place at TN = 34 K. The magnetic structure sees an easy-plane arrangement within the trigonal basal a–b-plane of ferromagnetic layers of iron and samarium having a canting angle of about 70° relative to each other. Neighbouring layers in the c-direction are antiferromagnetically coupled; at 2 K the magnetic moment values amount to μFe = 4.2(1) μB and μSm = 0.8(2) μB. The non-Brillouin type increase of the iron magnetic moment below TN points to a strong Fe–Sm exchange and to the simultaneous appearance of long range magnetic order on both sublattices.
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Держатели документа:
[Ritter, C.] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
[Pankrats, A.
Gudim, I.
Vorotynov, A.] RAS, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Ritter, C.; Pankrats, A.I.; Панкрац, Анатолий Иванович; Gudim, I. A.; Гудим, Ирина Анатольевна; Vorotynov, A.M.; Воротынов, Александр Михайлович
}
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20.
Caloric characteristics of
PbTiO3 in the temperature range of the ferroelectric phase transition / E. A. Mikhaleva [et al.]> // Phys. Solid State. - 2012. -
Vol. 54
,
Is. 9
. - P. 1832-1840,
DOI
10.1134/S1063783412090181. - 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). . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
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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Публикация на русском языке
Калорические характеристики PbTiO3 в области сегнетоэлектрического фазового перехода [Текст] / Е. А. Михалева [и др.] // Физ. тверд. тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54 Вып. 9. - С. 1719-1726
Держатели документа:
[Mikhaleva, E. A.
Flerov, I. N.
Gorev, M. V.] Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660074, Russia
[Mikhaleva, E. A.
Flerov, I. N.
Gorev, M. V.
Molokeev, M. S.
Cherepakhin, A. V.
Kartashev, A. V.
Mikhashenok, N. V.
Sablina, K. A.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Mikhaleva, E. A.; Михалева, Екатерина Андреевна; Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Cherepakhin, A. V.; Черепахин, Александр Владимирович; Kartashev, A. V.; Карташев, Андрей Васильевич; Mikhashenok, N. V.; Михашенок, Наталья Владимировна; Sablina, K. A.; Саблина, Клара Александровна
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