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Dielectric and transport properties, electric polarization at the sequential structural phase transitions in iron-substituted bismuth pyrostannate / S. S. Aplesnin, L. V. Udod, M. N. Sitnikov, O. B. Romanova // Ceram. Int. - 2021. - Vol. 47, Is. 2. - P. 1704-1711, DOI 10.1016/j.ceramint.2020.08.287. - Cited References: 33. - The reported study was funded by Russian Foundation for Basic Research project № 20-52-00005 Bel_a . - ISSN 0272-8842
Кл.слова (ненормированные):
Dielectric properties -- Impedance -- Electrical conductivity -- Electric polarization -- Thermopower
Аннотация: The electrical characteristics including the electrical resistance, impedance, I–V characteristics, capacitance, dissipation factor, and thermoelectric power of the Bi2Sn2-хFeхO7 (х = 0.1, 0.2) stannates have been investigated in the temperature range of 100–600 K at frequencies of 102–106 Hz. The paramagnetic contribution of electrons to the dynamic magnetic susceptibility has been established. The conductivity mechanism of the compounds has been found from the I–V characteristics and the change in the carrier sign has been determined from the thermoelectric power. The hysteresis of the I–V curves, charge transfer currents and polarization current have been observed in the Bi2Sn1·8Fe0·2O7 compound. A nonlinear field dependence of the polarization in the orthorhombic phase has been found. The correlation between the obtained characteristics and the phase structure transitions has been established. Two relaxation channels and activation energy have been found using the Debye model. The hysteretic I–V characteristics have been explained using a model of the electronic structure and the dipole and migration polarization.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Udod, L. V.; Удод, Любовь Викторовна; Sitnikov, M. N.; Romanova, O. B.; Романова, Оксана Борисовна
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    Magnetodielectric effect and spin state of iron ions in iron-substituted bismuth pyrostannate / L. Udod, S. Aplesnin, M. Sitnikov [et al.] // Eur. Phys. J. Plus. - 2020. - Vol. 135, Is. 10. - Ст. 776, DOI 10.1140/epjp/s13360-020-00781-2. - Cited References: 38. - This study was supported in part by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk krai, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, Project No. 18-42-240001 r_a «Inversion of the Sign of the Magnetoelectric Tensor Components on Temperature in Neodymium-Substituted Bismuth Ferrite Garnet Films » and by the Russian Foundation for Basic Research, Project No. 20-52-00005 bel_a . - ISSN 2190-5444
   Перевод заглавия: Магнитодиэлектрический эффект и спиновое состояние ионов железа в железо-замещенном висмутовом пиростаните
Аннотация: The magnetic and magnetodielectric properties of bismuth pyrostannate Bi2(Sn1-xFex)2O7 (x= 0.1 and 0.2) have been examined. Using the Mossbauer spectroscopy and electron paramagnetic resonance, the high-spin state and crystallographic positions of iron ions have been established. The coexistence of triclinic symmetry domains in the Bi2(Sn1-xFex)2O7(x=0.1) compound with the monoclinic symmetry below 140 K has been found. For the Bi2(Sn1-xFex)2O7 composition with x= 0.2 , the nonlinear field dependence of magnetization in the paramagnetic region up to room temperatures has been observed. The electric polarization hysteresis and the magnetoelectric effect in the Bi2(Sn1-xFex)2O7 compound have been disclosed. The magnetic field-dependent anomalous behavior of magnetization has been explained by the magnetoelectric effect.

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Держатели документа:
Federal Research Center KSC SB RAS, Kirensky Institute of Physics, Akademgorodok 50, Krasnoyarsk, 660036, Russian Federation
Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Udod, L. V.; Удод, Любовь Викторовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Sitnikov, M.; Romanova, O. B.; Романова, Оксана Борисовна; Bayukov, O. A.; Баюков, Олег Артемьевич; Vorotinov, A. M.; Воротынов, Александр Михайлович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Patrin, G. S.; Патрин, Геннадий Семёнович
}
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Udod, L. V.
Magnetic properties of bismuth pyrostannate doped with 3D ions / L. V. Udod, S. S. Aplesnin, M. N. Sitnikov // Inorg. Mater.: Appl. Res. - 2020. - Vol. 11, Is. 4. - P. 809-814, DOI 10.1134/S2075113320040383. - Cited References: 11. - This study was supported by the Russian Foundation for Basic Research, project nos. 18-52-00009 Bel_a, 18-42-240001 r_a, and 18-32-00079 mol_a and state assignment no. 3.5743.2017/6.7 . - ISSN 2075-1133
Кл.слова (ненормированные):
crystal structure -- magnetic and dielectric properties -- I–V characteristic -- conductivity -- phase transitions
Аннотация: The effect of substitution of Cr3+ and Mn4+ ions for tin in bismuth pyrostannate on the magnetic properties of the compound has been investigated. The interrelation between the magnetic, dielectric, and electrical properties has been established. Qualitative dependences of the temperature behavior of the permittivity and magnetic susceptibility on the substituent ion have been obtained. A change in the conductivity type from hopping to tunneling has been found.

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Публикация на русском языке Удод, Любовь Викторовна. Магнитные свойства пиростанната висмута, допированного 3d-ионами [Текст] / Л. В. Удод, С. С. Аплеснин, М. Н. Ситников // Материаловедение. - 2019. - № 10. - С. 19-24

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Sitnikov, M. N.; Удод, Любовь Викторовна
}
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    Bismuth activated full spectral double perovskite luminescence materials by excitation and valence control for future intelligent LED lighting / Y. Wei, H. Yang, Z. Y. Gao [et al.] // Chem. Commun. - 2020. - Vol. 56, Is. 64. - P. 9170-9173, DOI 10.1039/d0cc03975f. - Cited References: 27. - This work was supported by the National Natural Science Foundation of China (Grant No. 51672259) and the Fundamental Research Funds for the National Universities, China University of Geosciences (Wuhan) (No. 1910491T02) . - ISSN 1359-7345. - ISSN 1364-548X
   Перевод заглавия: Активированные висмутом люминесцентные материалы двойных перовскитов, с полным спектром излучения, который получается за счет управления возбуждением и валентностью, для интеллектуального светодиодного освещения в будущем

РУБ Chemistry, Multidisciplinary
Рубрики:
PHOTOLUMINESCENCE
   PHOSPHORS
   Bi3+
   MODULATION
   CRYSTAL
Аннотация: A novel La2Mg1.14Zr0.86O6:Bi3+ double perovskite phosphor with excitation-induced blue/green photoluminescence tuning is reported. By designing Bi3+ → Eu3+ energy transfer, single-composition white light with wide-scale adjustable corrected color temperatures (CCTs) is successfully achieved. This work initiates a new insight to explore phosphors with excitation-induced photoluminescence tuning and wide CCT control for future intelligent LED lighting.

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Держатели документа:
China Univ Geosci, Engn Res Ctr Nanogeomat, Minist Educ, Fac Mat Sci & Chem, Wuhan 430074, Hubei, Peoples R China.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.

Доп.точки доступа:
Wei, Y.i.; Yang, Hang; Gao, Zhiyu; Xing, Gongcheng; Molokeev, M. S.; Молокеев, Максим Сергеевич; Li, Guogang
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    Study of structural properties of bismuth pyrostannate by Raman and IR spectroscopy / L. V. Udod, O. B. Romanova, S. S. Aplesnin, V. V. Kretinin // Sib. J. Sci. Technol. - 2020. - Vol. 21, Is. 4. - P. 556-564 ; Сибирский журнал науки и технологий, DOI 10.31772/2587-6066-2020-21-4-556-564. - Cited References: 19. - The reported study was funded by RFBR according to the research project № 20-52-00005 Bel_a . - ISSN 2587-6066
   Перевод заглавия: Исследование структурных свойств пиростанната висмута методом Раман и ИК спектроскопии
Кл.слова (ненормированные):
bismuth pyrostannate -- crystal structure -- phase transitions -- IR spectroscopy -- Raman spectroscopy -- X-ray structural analysis -- пиростаннат висмута -- кристаллическая структура -- фазовые переходы -- ИК спектроскопия -- Раман спектроскопия -- рентгеноструктурный анализ
Аннотация: Chromium-substituted bismuth pyrostannates with a pyrochlore structure were synthesized by the solid-phase reaction method. The X-ray structural analysis performed at room temperature showed that the samples Bi2(Sn1-xCrx)2O7, x = 0; 0.05, 0.1 are single-phase and belong to the Pc monoclinic structure. Polymorphic transformations of the synthesized samples were studied by Raman and IR spectroscopy. IR spectra were obtained at the temperature range 110–525 K and frequencies 350–1100 cm–1. Raman spectra were measured at room temperature at frequencies of 100–3000 cm–1. Heterovalent substitution of Sn4+ for Cr3+ modifies the spectra of pure Bi2Sn2O7. The crystal structure of Bi2Sn2O7 consists of two oxygen sublattices: SnO6 and Bi2O'. Chromium ions substituted tin ions in the SnO6 oxygen octahedra, distorting the local structure in the vicinity of bismuth ions. Phonon modes are softening in the vicinity of phase transitions. А shift of the phase boundaries of polymorphic transitions is observed for Bi2(Sn1-хCrх)2O7, x = 0.05, 0.1. The frequencies of stretching vibration modes were determined from IR and Raman spectra. The substitution of chromium for tin ions resulted in the appearance of two new modes at frequencies of 581 and 822 cm–1 in the Raman spectra. The absence of an inversion center in the crystal structure of Bi2(Sn1-xCrx)2O7 is confirmed by Raman spectroscopy. IR spectra of chromium-substituted samples consist of complex lines, which decompose into 2 and 3 Lorentzian lines. The softening and broadening of optical absorption modes are associated with the electronic contribution. Impurity states of electrons form polarons.
Методом твердофазной реакции синтезированы хромзамещенные пиростаннаты висмута со структурой пирохлора. Рентгеноструктурный анализ, выполненный при комнатной температуре, показал, что образцы Bi2(Sn1-хCrх)2O7, х = 0; 0,05, 0,1 однофазные и принадлежит к моноклинной структуре Pc. Полиморфные превращения синтезированных образцов изучались методами Раман и ИК спектроскопии. ИК-спектры получены в температурном диапазоне 110-525 К, интервале частот 350-1100 см-1. Спектры Рамановского рассеяния измерялись при комнатной температуре на частотах 100-3000 см-1. Гетеровалентное замещение Sn4+ на Cr3+ видоизменяет спектры чистого Bi2Sn2O7. Кристаллическая структура Bi2Sn2O7 состоит из двух кислородных подрешеток: SnO6 и Bi2O′. Ионы хрома замещают ионы олова в кислородных октаэдрах SnO6, искажая локальную структуру в окрестности ионов висмута. Вблизи фазовых переходов происходит смягчение фононных мод. Для Bi2(Sn1-хCrх)2O7, 0,05, 0,1 наблюдается смещение фазовых границ полиморфных переходов. Из ИК и Раман спектров определены частоты мод валентных колебаний. В Рамановских спектрах замещение ионов олова хромом привело к появлению двух новых мод на частотах 581 и 822 см-1. Отсутствие центра инверсии в кристаллической структуре Bi2(Sn1-хCrх)2O7 подтверждается Раман спектроскопией. ИК спектры хромзамещенных образцов состоят из сложных линий, которые разлагаются на 2 и 3 линии Лоренцовой формы. Смягчение и уширение спектров поглощения связывается с электронным вкладом. Примесные состояния электронов образуют поляроны.

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Держатели документа:
Reshetnev Siberian State University of Science and Technology, 31, Krasnoyarskii rabochii prospect, Krasnoyarsk, 660037, Russian Federation
Kirensky Institute of Physics, Federal Researh Center KSC SB RAS, 50-38, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Udod, L. V.; Удод, Любовь Викторовна; Romanova, O. B.; Романова, Оксана Борисовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Kretinin, V. V.

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Synthesis, crystal structure, and physicochemical properties of Bi4-xPrxTi3O12 (x=0.4, 0.8, 1.2, 1.6) solid solutions / L. T. Denisova, M. S. Molokeev, Y. F. Kargin [et al.] // Inorg. Mater. - 2021. - Vol. 57, Is. 9. - P. 919-928, DOI 10.1134/S002016852109003X. - Cited References: 40 . - ISSN 0020-1685. - ISSN 1608-3172

РУБ Materials Science, Multidisciplinary
Рубрики:
BI4-XRXTI3O12 R-X
   HEAT-CAPACITY
   AURIVILLIUS PHASES
   PR
   ND
   BI4TI3O12
Кл.слова (ненормированные):
bismuth titanates -- solid-state synthesis -- crystal structure -- luminescence -- high-temperature heat capacity -- phase transition
Аннотация: Bi4–xPrxTi3O12 (x = 0.4, 0.8, 1.2, 1.6) solid solutions have been prepared by solid-state reactions, via multistep firing of stoichiometric mixtures of their constituent oxides in air at temperatures from 1003 to 1323 K. Their crystal structure has been determined using X-ray diffraction, and their luminescence spectra have been measured at room temperature. High-temperature heat capacity of polycrystalline substituted bismuth titanate samples has been determined by differential scanning calorimetry. The Cp(T) curves of the solid solutions with x = 0.4 and 0.8 have extrema related to phase transitions. Experimental data have been used to calculate the main thermodynamic functions of the solid solutions.

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Публикация на русском языке Синтез, кристаллическая структура и физико-химические свойства твердых растворов Bi4-xPrxTi3O12 (x = 0.4, 0.8, 1.2, 1.6) [Текст] / Л. Т. Денисова, М. С. Молокеев, Ю. Ф. Каргин [и др.] // Неорган. матер. - 2021. - Т. 57 № 9. - С. 968-977

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Fed Res Ctr, Siberian Branch, Kirensky Inst Phys,Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Baikov Inst Met & Mat Sci, Moscow 119991, Russia.

Доп.точки доступа:
Denisova, L. T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Kargin, Yu F.; Gerasimov, V. P.; Герасимов, Виктор Петрович; Krylov, A. S.; Крылов, Александр Сергеевич; Aleksandrovskii, A. S.; Александровский, Александр Сергеевич; Chumilina, L. G.; Denisov, V. M.; Vasil'ev, G. V.; Васильев Г. В.
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Synthesis, Structure, and Thermophysical Properties of Pb10 – xBix(GeO4)2 + xVO4)4 – x (x = 0–3) in the Temperature Range of 350–950 K / L. T. Denisova, M. S. Molokeev, V. M. Denisov [et al.] // Phys. Solid State. - 2020. - Vol. 62, Is. 11. - P. 2045-2051, DOI 10.1134/S1063783420110116. - Cited References: 26. - The study was carried out under the state assignment for science for the Siberian Federal University, project no. FSRZ-2020-0013 . - ISSN 1063-7834
Кл.слова (ненормированные):
bismuth-doped lead vanadate germanates -- apatites -- structure -- high-temperature specific heat -- thermodynamic properties
Аннотация: The Pb10 – xBix(GeO4)2 + x(VO4)4 – x (x = 0–3) compounds with an apatite structure have been obtained for the first time from the initial PbO, Bi2O3, GeO2, and V2O5 oxides by the solid-state synthesis in the temperature range of 773–1073 K. The structure of the compounds has been determined by X-ray diffraction analysis. The effect of temperature on specific heat of the synthesized compounds has been investigated by differential scanning calorimetry. The thermodynamic properties of the compounds have been calculated from the experimental Cp = f(T) data.

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Публикация на русском языке Синтез, структура и теплофизические свойства апатитов Pb10-xBix(GeO4)2+xVO4)4-x (x=0-3) в области 350-950 K [Текст] / Л. Т. Денисова, М. С. Молокеев, В. М. Денисов [и др.] // Физ. тверд. тела. - 2020. - Т. 62 Вып. 11. - С. 1828-1833

Держатели документа:
Siberian Federal University, Institute of Metallurgy and Materials Science, Krasnoyarsk, 660041, Russian Federation
Siberian Federal University, Institute of Engineering Physics and Radio Electronics, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Denisova, L. T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Denisov, V. M.; Golubeva, E. O.; Galiakhmetova, N. A.
}
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Coexistence of the electric polarization and conductive current in the bismuth–neodymium ferrite garnet films / S. S. Aplesnin, A. N. Masyugin, M. N. Volochaev, T. Ishibashi // J. Mater. Sci. Mater. Electron. - 2021. - Vol. 32. - P. 3766-3781, DOI 10.1007/s10854-020-05121-9. - Cited References: 42 . - ISSN 0957-4522
Кл.слова (ненормированные):
Bismuth -- Bismuth compounds -- Dielectric materials -- Epitaxial films -- Ferroelectricity -- Gallium compounds -- Garnets -- Hysteresis -- Iron compounds -- Neodymium -- Neodymium compounds -- Piezoelectricity -- Single crystals -- Substrates
Аннотация: The Nd1Bi2Fe5O12/Nd2Bi1Fe4Ga1O12 polycrystalline films on the glass substrate and the Nd0.5Bi2.5Fe5O12 epitaxial films on the single-crystal gadolinium gallium garnet substrate have been investigated by impedance and dielectric spectroscopy. The inductive contribution to the impedance and two relaxation channels related to ferroelectric domains and migration polarization have been established. The magnetocapacitance and magnetoimpedance have been determined. The conductive and polarization currents and the phase difference between them for the films of two types have been determined. The critical temperatures of the polarization disappearance and hysteresis I–V have been found. A model of the polarization caused by the piezoelectric effect and flexoelectric interaction has been proposed. I–V hysteresis is explained by the presence of ferroelectric domains near the interface and is associated with the hysteresis of the electric polarization.

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Держатели документа:
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Department of Materials Science and Technology, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

Доп.точки доступа:
Aplesnin, S. S.; Masyugin, A. N.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Ishibashi, T.
}
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Magnetoresistive effect in the cobalt-doped bismuth ferrite films / O. B. Romanova, S. S. Aplesnin, M. N. Sitnikov [et al.] // J. Mater. Sci.: Mater. Electron. - 2020. - Vol. 31, Is. 10. - P. 7946-7952, DOI 10.1007/s10854-020-03333-7. - Cited References: 39 . - ISSN 0957-4522. - ISSN 1573-482X

РУБ Engineering, Electrical & Electronic + Materials Science, Multidisciplinary + Physics, Applied + Physics, Condensed Matter
Рубрики:
BIFEO3 THIN-FILMS
   ELECTRICAL-PROPERTIES
   COFE/CU MULTILAYERS
   GIANT MAGNETORESISTANCE
Аннотация: Bismuth ferrite films have been synthesized by the burst-mode deposition of the BiFe0.8Co0.2O3 solid solutions onto object glasses. The surface morphology of the BiFe0.8Co0.2O3 films has been examined. The effect of electron doping implemented by substitution of cobalt for iron in the BiFe0.8Co0.2O3 films on their magnetic, electrical, and galvanomagnetic properties has been investigated at temperatures of 77-600 K in magnetic fields of up to 12 kOe. The negative magnetoresistance has been observed, which changes its sign in the region of formation of magnetically heterogeneous states and attain its maximum value above room temperature. It has been established that the magnetoresistance is caused by the competition of electron hoppings and localization of electrons in a magnetic field. Using the Hall measurements, the carrier type has been determined. A model of the change in the curriers sign upon heating due to the shift of the chemical potential relative to the impurity subband has been proposed.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian State Univ Sci & Technol, Krasnoyarsk 660014, Russia.
Natl Acad Sci Belarus, Sci Pract Mat Res Ctr, Minsk 220072, BELARUS.

Доп.точки доступа:
Romanova, O. B.; Романова, Оксана Борисовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Sitnikov, M. N.; Udod, L. V.; Удод, Любовь Викторовна; Begisheva, O. B.; Demidenko, O. F.
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10.

Influence of cation substitution on dielectric and electric properties of bismuth stannates Bi2Sn1.9Meo.1O7 (Me=Cr, Mn) / S. S. Aplesnin [et al.] // IOP Conf. Ser.: Mater. Sci. Eng. : IOP, 2019. - Vol. 467: 21st International Scientific Conference Reshetnev Readings 2017 (8 November 2018 through 8 November 2018) Conference code: 144163, Is. 1, DOI 10.1088/1757-899X/467/1/012014. - Cited References: 9. - This study was supported by the Russian Foundation for Basic Research project N 17-32-50080, the state order № 3.5743.2017/6.7.
Кл.слова (ненормированные):
Activation energy -- Capacitance -- Chromium -- Current voltage characteristics -- Dielectric losses -- Ions -- Manganese
Аннотация: The article studies effect of nonstoichiometric substitution of the tin ions by chromium and manganese ions on the dielectric and electrical properties of bismuth pyrostannate. The research performs measurements of the current-voltage characteristics, capacitance and tangent of the dielectric loss angle in the temperature range from 300 to 800 K; it finds a qualitative difference in the temperature behavior of the permittivity of bismuth pyrostannate with chromium and manganese ions. A change in the type of conductivity from hopping to tunneling emission is established. The change in the activation energy as a function of the ion radius is found.

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Держатели документа:
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation
Federal Research Center Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Udod, L. V.; Удод, Любовь Викторовна; Loginov, Y. Y.; Kretinin, V. V.; Masyugin, A. N.; International Scientific Conference Reshetnev Readings 2017(21st ; 8 November 2018 ; Krasnoyarsk, Russian Federation)
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