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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Udod L. V., Sitnikov M. N.
Заглавие : Electronic transition, ferroelectric and thermoelectric properties of bismuth pyrostannate Bi2(Sn0.85Cr0.15)2O7
Место публикации : Ceram. Int. - 2018. - Vol. 44, Is. 2. - P.1614-1620. - ISSN 02728842 (ISSN), DOI 10.1016/j.ceramint.2017.10.082
Примечания : Cited References: 41. - The authors would like to thank M. Molokeev for the clarification of x-ray spectra. The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project № 16–52-00045 bel_a.
Ключевые слова (''Своб.индексиров.''): dielectric properties--ferroelectric properties--impedance--thermopower--electrical properties
Аннотация: The ferroelectric properties of bismuth pyrostannate Bi2(Sn0.85Cr0.15)2O7 in the high-temperature region are established. The linear thermal expansion coefficient, electrical resistance, impedance, I−V characteristics, capacitance, loss-angle tangent, charge, and thermopower of the investigated material are measured in the temperature range of 300−700 K at frequencies of 102−106 Hz. Anomalies of the thermal expansion coefficient and hodograph spectrum variation in the region of polymorphic phase transitions are observed. The high resistance and change of the hopping conductivity for the tunnel-emission are found. The hysteresis in the electric field dependence of polarization is established. The change in the thermopower sign with temperature is revealed. The obtained experimental data are explained in the framework of the model of migration polarization by charged chromium ions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Udod L. V., Sitnikov M. N., Shestakov N. P.
Заглавие : Bi2(Sn0.95Cr0.05)2O7: Structure, IR spectra, and dielectric properties
Место публикации : Ceram. Int.: Elsevier, 2016. - Vol. 42, Is. 4. - P.5177-5183. - ISSN 02728842 (ISSN), DOI 10.1016/j.ceramint.2015.12.040
Примечания : Cited References: 45. - This work was supported by the Russian Foundation for Basic Research Projects no. 15-42-04099 r_siberia_a, Siberian Branch of Science and NAS of Belarus “Electronic and magnetic phase transitions in materials with magnetoelectric affect” and government work no. 114090470016.
Предметные рубрики: BISMUTH PYROSTANNATE
PYROCHLORE STRUCTURE
MAGNETIC-PROPERTIES
PARTIAL OXIDATION
HIGH-TEMPERATURE
X-RAY
Bi2Sn2O7
SUBSTITUTION
CATALYSTS
DIFFRACTION
Ключевые слова (''Своб.индексиров.''): bismuth pyrostannate--infrared absorption spectra--structural transition--permittivity--debye model
Аннотация: Infrared absorption spectra of the bismuth pyrostannate Bi2(Sn0.95Cr0.05)2O7 were investigated in the frequency range 350-1100 cm-1 at temperatures of 110-525 K. Four frequency regions with split absorption lines are distinguished. Softening of frequencies at the structural transitions was observed. The maxima of permittivity measured in the frequency range 1-200 kHz at temperatures 100-400 K were determined. It was found that the magnetic susceptibility changes its sign in the low-temperature region. The correlation between anomalies in the magnetic susceptibility, permittivity, and absorption line intensity was established. Softening of frequencies is explained by the variation in the coefficient of thermal expansion of the lattice. The temperature behavior of permittivity is described using the Debye model. © 2015 Elsevier Ltd and Techna Group S.r.l.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Аплеснин, Сергей Степанович, Udod L. V., Sitnikov M. N., Eremin E. V., Molokeev M. S., Tarasova L. S., Yanushkevich K. I., Galyas A. I.
Заглавие : Correlation of the magnetic and transport properties with polymorphic transitions in bismuth pyrostannate Bi2(Sn1 − xCr x)2O7
Коллективы : Russian Foundation for Basic Research [15-02-01445-a], Ministry of Education and Science of the Russian Federation [114090470016]
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 57, Is. 8. - P.1627-1632. - ISSN 1063-7834, DOI 10.1134/S1063783415080028
Примечания : Cited References: 17. - This study was supported by the Russian Foundation for Basic Research (project no. 15-02-01445-a) and the Ministry of Education and Science of the Russian Federation (state task no. 114090470016).
Предметные рубрики: GAS SENSORS
Bi2Sn2O7
CRYSTAL
Аннотация: The correlation of the electrical, magnetic, and structural properties of Bi2(Sn1 − xCrx)2O7 solid solutions has been investigated for two compositions with x = 0.05 and 0.1. The temperatures of structural phase transitions and anomalies of the electrical resistance in the vicinity of these transitions at temperatures in the range 300 K ˂ T ˂ 1000 K have been determined using differential scanning calorimetry. It has been found that the thermoelectric power changes sign upon the polymorphic transition. The paramagnetic Curie temperature and the chromium-ion spin have been found from the temperature dependence of the magnetic susceptibility in the range 4 K ˂ T ˂ 1000 K and from the field dependence of the magnetic moment in magnetic fields of up to 6 T.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Udod L. V., Aplesnin S. S., Sitnikov M. N., Molokeev M. S.
Заглавие : Dielectric and electrical properties of polymorphic bismuth pyrostannate Bi2Sn2O7
Коллективы : Russian Foundation for Basic Research [09-02-00125-a, 14-02-92003 NNS_a, 14-02-90010_Bel_a, 14-12-00124]
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2014. - Vol. 56, Is. 7. - P.1315-1319. - ISSN 1063-7834, DOI 10.1134/S1063783414070336. - ISSN 1090-6460
Примечания : Cited References: 20. - This study was supported by the Russian Foundation for Basic Research (project nos. 09-02-00125-a, 14-02-92003 NNS_a, 14-02-90010_Bel_a, and 14-12-00124).
Предметные рубрики: STRONG MAGNETIC-FIELD
DOPED MANGANITES
MAGNETORESISTANCE
Bi2O3
Аннотация: The Bi2Sn2O7 compound existing simultaneously in two polymorphic modifications, namely, orthorhombic and cubic, has been synthesized for the first time by solid-phase synthesis. The dielectric and electrical properties of the compound have been studied in the temperature range 100 K ˂ T ˂ 500 K. Anomalies in the temperature dependences of the electrical resistivity and the permittivity (imaginary and real parts) have been found at both low and high temperatures. These features are explained in terms of the model of martensitic phase transitions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Udod L. V., Sitnikov M. N., Romanova O. B.
Заглавие : Dielectric and transport properties, electric polarization at the sequential structural phase transitions in iron-substituted bismuth pyrostannate
Место публикации : Ceram. Int. - 2021. - Vol. 47, Is. 2. - P.1704-1711. - ISSN 02728842 (ISSN), DOI 10.1016/j.ceramint.2020.08.287
Примечания : Cited References: 33. - The reported study was funded by Russian Foundation for Basic Research project № 20-52-00005 Bel_a
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Udod L. V., Sitnikov M. N., Kretinin V. V., Molokeev M. S., Mironova-Ulmane N.
Заглавие : Dipole glass in chromium-substituted bismuth pyrostannate
Коллективы : Russian Foundation for Basic Research [N 18-52-00009 Bel_a, 18-32-00079 mol_a, 3.5743.2017/6.7]
Место публикации : Mater. Res. Express. - 2018. - Vol. 5, Is. 11. - Ст.115202. - ISSN 2053-1591, DOI 10.1088/2053-1591/aaddd9
Примечания : Cited References: 33. - This study was supported by the Russian Foundation for Basic Research project N 18-52-00009 Bel_a, No 18-32-00079 mol_a, the state order No 3.5743.2017/6.7.
Предметные рубрики: BI4TI3O12 THIN-FILMS
NEUTRON-DIFFRACTION
RAMAN-SPECTROSCOPY
BI2SN2O7
Ключевые слова (''Своб.индексиров.''): dipole glass--permittivity--polarization--raman scattering spectra--structural transition
Аннотация: To establish the existence of dipole glass in the chromium-substituted bismuth pyrostannate solid solutions, the frequency and temperature dependences of the permittivity have been measured in the temperature range of 300–750 K. The field and dynamic dependences of polarization in the temperature range of 80–550 K have been determined. Using the Raman scattering spectra, the absence of inversion center has been established. The maximum of electrical resistance has been found in the vicinity of the dipole moment freezing point. The carrier type has been determined from the thermopower data. The polarization relaxation is shown to be nonexponential. The experimental data are explained within the model of dipole glass in the α- phase and the model of charged crystalline domain walls with the electron-polarization relaxation mechanism above the α–β structural transition.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Udod L. V., Aplesnin S. S., Eremin E. V., Sitnikov M. N., Molokeev M. S.
Заглавие : Effect of Mn doping on magnetic and dielectric properties of Bi2Sn2O7
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Moscow Int. Symp. on Magnet. (MISM-2014): Book of abstracts. - 2014. - Ст.1PO-J1-6. - P.513. - ISBN 978-5-91978-025-0
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Udod L. V., Aplesnin S. S., Sitnikov M. N., Eremin E. V., Molokeev M. S.
Заглавие : Effect of Mn doping on magnetic and dielectric properties of Bi2Sn2O7
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Solid State Phenom.: Selected, peer reviewed papers/ ed.: N. Perov, A. Semisalova: Trans Tech Publications Ltd, 2015. - Vol. 233-234: Achievements in Magnetism. - P.105-108. - ISSN 1662-9779, DOI 10.4028/www.scientific.net/SSP.233-234.105. - ISSN 978-3-03835-482-6
Предметные рубрики: Achievements in magnetism
Ключевые слова (''Своб.индексиров.''): crystallographic structure--cubic phase--dielectric permeability--electrical resistivity--magnetic moment--martensitic phase transitions--orthorhombic phases--polymorphic transformation
Аннотация: The Bi2(Sn0.95Mn0.05)2O7 compound existing simultaneously in two polymorphic modifications, namely, orthorhombic and cubic has been synthesized for the first time by solid-phase synthesis. The magnetic, dielectric and electrical properties of the compound have been studied. Anomalies in the temperature dependences of the electrical resistance and magnetic propoties have been found. These features are explained as martensitic phase transitions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrakovskii G. A., Sablina K. A., Udod L. V., Pankrats A. I., Velikanov D. A., Bondarenko G. V., Szymczak R. , Baran M.
Заглавие : Effect of Ni-substitution on magnetic phase transition in CuB 2O4
Место публикации : Journal of Magnetism and Magnetic Materials: Elsevier Science Publishing Company, Inc., 2006. - Т. 300, № 1. - P.e476-e478. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2005.10.198
Примечания : Библиогр.: 10. - Грант РФФИ 03-02-16701
ГРНТИ : 45.09
Аннотация: The single crystals Cu1 xNixB2O4 with x ¼ 0:002; 0.005; 0.009; 0.014 were grown by spontaneous crystallization and the magnetic properties of these crystals have been studied. The strong influence of substitution on the value of critical fields H?c at which the modulated states transform into a weak ferromagnetic one was observed in the temperature range 9.5–20 K. The essential change of temperature dependence of a paramagnetic susceptibility w for Ni-doped samples in comparison with pure CuB2O4 was revealed. The modulated state was not observed in the temperature range 9.5–20 K for Ni content more than x ¼ 0:009.
РИНЦ,
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Sablina K. A., Udod L. V., Pankrats A. I., Velikanov D. A., Vasiliev A. D., Bovina A. F., Bondarenko G. V.
Заглавие : Effect of substitution on magnetic properties of CuB2O4
Место публикации : Moscow International Symposium on Magnetism, Moscow, 2008, p.687
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Udod L. V., Sitnicov M. N., Aplesnin S. S., Molokeev M. S.
Заглавие : Electrical and dielectrical propeties of gas-sensor resistive type Bi2Sn2O7
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : Solid State Phenom.: Selected, peer reviewed papers/ ed.: S. G. Ovchinnikov, A. Samardak: Trans Tech Publications, 2014. - Vol. 215: Trends in Magnetism: Nanomagnetism (EASTMAG-2013). - P.503-506. - ISSN 978-303835054-5, DOI 10.4028/www.scientific.net/SSP.215.503. - ISSN 1662-9779
Примечания : Cited References: 14. - This work was supported by the Russian Foundation for Basic Research projects no. 12-02-00125-а
Ключевые слова (''Своб.индексиров.''): crystallographic structure--polymorphic transformations--electrical resistivity--dielectric permeability
Аннотация: Polycrystalline samples of Bi2Sn2O7 have been synthesized by conventional solid-state reaction method. According to the X-ray powder diffraction research, our sample co-existing of two polymorphs phases: cubic and rhombic, concurrently. The real dielectric permeability Re (ε) monotonic grows versus temperature and the imaginary dielectric permeability Im (ε) nonmonotonic is increased at the heating. There are maxima at Т=450 K on both temperature dependences Im (ε) and Re (ε) reveal. Anomalies in the temperature dependence of electrical resistivity at temperatures are found and to be correlated with the α → β structural phase transition temperature.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Romanova O. B., Kretinin V. V., Aplesnin S. S., Sitnikov M. N., Udod L. V., Yanushkevich K. I.
Заглавие : Electrical properties of the polycrystalline BiFe0.95Co0.05O3 films
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Belarusian Republican Foundation for Basic Research [20-52-00005]
Место публикации : Phys. Solid State. - 2021. - Vol. 63. Is. 6. - P.897-903. - ISSN 1063-7834, DOI 10.1134/S1063783421060184. - ISSN 1090-6460(eISSN)
Примечания : Cited References: 34. - This study was supported by the Russian Foundation for Basic Research and the Belarusian Republican Foundation for Basic Research, project no. 20-52-00005
Предметные рубрики: BiFeO3 THIN-FILMS
PHASE-SEPARATION
CRYSTAL
MODEL
Аннотация: Semiconductor BiFe0.95Co0.05O3 thin-film compounds have been synthesized by a burst technique. The film surface morphology and the effect of electronic doping via substitution of cobalt ions for trivalent iron on the optical, magnetic, and kinetic properties have been investigated in the temperature range of 77-600 K in magnetic fields of up to 12 kOe. Two electron relaxation channels have been found in the impedance spectrum in the frequency range of 0.1-1000 kHz. The negative magnetoresistance in the anomalous magnetization region and the maximum magnetoimpedance in the vicinity of the surface phase transition have been established. Using the Hall measurements, carrier types dominating in the magnetoresistance and magnetoimpedance effects have been determined. The magnetization anomalies have been explained in the model of superparamagnetic clusters and the magnetoresistance, by the carrier scattering by spin fluctuations.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Udod L. V., Sitnikov M. N., Velikanov D. A., Molokeev M. S., Romanova O. B., Shabanov A. V.
Заглавие : Enhancement of ferromagnetism and ferroelectricity by oxygen vacancies in mullite Bi2Fe4O9 in the Bi2(Sn0.7Fe0.3)2O7-x matrix
Место публикации : J. Magn. Magn. Mater. - 2022. - Vol. 559. - Ст.169530. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2022.169530
Примечания : Cited References: 47
Аннотация: A new bismuth pyrostannate-based composite Bi2(Sn0.7Fe0.3)2O7-x/Bi2Fe4O9 (BSFO/BFO) has been obtained by the solid-state synthesis. Temperature dependences of the magnetic hysteresis and remanent magnetization and the nonlinear field dependence of the magnetization for the Bi2Fe4O9 antiferromagnet have been established. A temperature of the formation of canted sublattices in the antiferromagnet with the occurrence of a spontaneous moment in mullite has been determined. The mechanism of the electric polarization hysteresis and the temperature dependence of the remanent polarization have been established. It has been shown, that, below the Néel temperature, the dipole polarization is induced by a lone electron pair of bismuth ions. At T TN, the migration polarization is caused by the charge carrier density at the chemical potential. A significant increase in the remanent magnetization of mullite in the bismuth pyrostannate matrix with oxygen vacancies over a value typical of polycrystalline mullite has been established. Remanent magnetization is explained in terms of ferron model.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Udod L. V., Aplesnin S. S., Zelenov F. V., Sitnikov M. N., Molokeev M. S., Romanova O. B.
Заглавие : Enhancement of the magnetoelectric effect in the Bi2Fe4O9/BiFeO3 composite as a result of dipole and migration polarization in mullite
Колич.характеристики :13 с
Место публикации : J. Mater. Sci. - 2024. - Vol. 59, Is. 24. - P.10763-10775. - ISSN 00222461 (ISSN), DOI 10.1007/s10853-024-09885-x. - ISSN 15734803 (eISSN)
Примечания : Cited References: 55
Аннотация: The effect of the size of Bi2Fe4O9 and BiFeO3 nanoparticles on the magnetoelectric interaction in the Bi2Fe4O9/BiFeO3 composite with a percentage ratio of 67/33 has been studied. The electrostriction and electric polarization on electric and magnetic field in wide temperature range has been measured. The hysteresis of the polarization and I?V characteristics has been found. Temperature ranges with activation and hopping types of conductivity have been found. The mechanism of electric polarization and the crossover temperature from dipole polarization to migration polarization at 260 K have been established. Linear and quadratic contributions to the magnetoelectric effect have been found. Below 120 K the linear contribution is an order of magnitude greater than the quadratic contribution and above 240 K the quadratic contribution to the ME effect prevails. Models have been proposed to explain the enhancement of the magnetoelectric effect as a result of the migration polarization in mullite and linear magnetoelectric effect in bismuth ferrite. The correlation of temperatures of the extremum of the temperature coefficient of the electrical resistance and the magnetic phase transition in mullite at 260 K indicates a polaron-type conductivity and a strong electron?phonon interaction. A change in the sign of the electrostriction coefficient upon heating and the compression temperature of the composite in an electric field was found.
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15.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aplesnin S. S., Udod L. V., Sitnikov M. N., Velikanov D. A., Romanova O. B.
Заглавие : Ferromagnetism induced by oxygen vacancies in mullite Bi2Fe4O9
Коллективы : Российская академия наук, Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН, Казанский (Приволжский) федеральный университет, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022): Book of abstracts/ program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 1, Sect.: Low dimensional magnetism. - Ст.C.O1. - P.327-328. - ISBN 978-5-94469-051-7
Примечания : Cited References: 3
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Romanova O. B., Aplesnin S. S., Udod L. V., Yanushkevich K. I., Zhivulko A. M.
Заглавие : Impedance and Hall effect in TmXMn1-XSe
Коллективы : "Actual problems of solid state physics" , International scientific conference, Научно-практический центр по материаловедению НАН Беларуси
Место публикации : IX International scientific conference “Actual problems of solid state physics": Book of abstracts / int. sci. com. S. S. Aplesnin [et al]. - Minsk, 2021. - P.174
Примечания : Cited References: 3. - The reported study was funded by RFBR according to the research project №20-52-00005 Bel_a. The reported study was funded by BRFBR according to the research project № Т20Р-052
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17.

Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Aplesnin S. S., Udod L. V., Loginov Y. Y., Kretinin V. V., Masyugin A. N.
Заглавие : Influence of cation substitution on dielectric and electric properties of bismuth stannates Bi2Sn1.9Meo.1O7 (Me=Cr, Mn)
Коллективы : International Scientific Conference Reshetnev Readings 2017
Место публикации : 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
Примечания : 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.
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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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Udod L. V., Aplesnin S. S., Sitnikov M. N., Romanova O. B.
Заглавие : Investigation of the magnetoelectric effect and thermoelectric power of the composite of iron-substituted bismuth pyrostannate Bi2(Sn0.7Fe0.3)2O7/Bi2Fe4O9
Колич.характеристики :7 с
Место публикации : Phys. Solid State. - 2023. - Vol. 65, Is. 8. - P.1305-1311. - ISSN 10637834 (ISSN), DOI 10.21883/PSS.2023.08.56576.83. - ISSN 10906460 (eISSN)
Примечания : Cited References: 45
Аннотация: The composite compound Bi2(Sn0.7Fe0.3)2O7/Bi2Fe4O9 in the ratio 91/9% was synthesized by the solid-phase reaction method. The current-voltage characteristics were studied in the temperature range 800–400 K. The hysteresis of the current-voltage characteristics was found. The magnetoelectric interaction and thermoelectric power have been studied. The temperatures of predominance of the even and linear functions of the magnetoelectric effect are established. The sign change of the thermopower has been found.
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Romanova O. B., Aplesnin S. S., Udod L. V., Galyas A. I., Zhivulko A. M., Yanushkevich K. I.
Заглавие : Kinetic effects in thulium manganese selenides
Коллективы : "Actual problems of solid state physics", International scientific conference, "Актуальные проблемы физики твердого тела", международная научная конференция, Научно-практический центр по материаловедению НАН Беларуси
Место публикации : X International scientific conference “Actual problems of solid state physics": Book of abstracts/ int. sci. com. S. S. Aplesnin [et al]. - Minsk, 2023. - Sect.: Functional materials and applications. - P.154. - ISBN 978-985-7299-65-2
Примечания : Cited References: 1
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Romanova O. B., Aplesnin S. S., Sitnikov M.N., Udod L. V., Shabanov A. V., Goncharov V.S., Zhivulko A.M., Yanushkevich K.I.
Заглавие : Kondo effects in variable-valence manganese-substituted thulium selenide
Колич.характеристики :7 с
Место публикации : Ceram. Int. - 2024. - Article in press. - ISSN 02728842 (ISSN), DOI 10.1016/j.ceramint.2024.06.171. - ISSN 18733956 (eISSN)
Примечания : Cited References: 31
Аннотация: The MnXTm1‒XSe (0 ≤ Х ≤ 0.2) solid solutions have been first synthesized and their structural, magnetic, and transport properties have been studied in the temperature range of 80–1000 K and magnetic fields of up to 12 kOe. The surface morphology of the samples has been examined and the chemical analysis has been carried out. It is shown that the valence change with the increasing substitution concentration is accompanied by a change in the lattice parameter and a decrease in the magnetic moment of the samples. The Kondo temperatures caused by the manganese and thulium subsystem have been found in the low- and room-temperature regions. The temperature of localization of small-radius polarons has been determined. A drastic decrease in the relaxation time in the range of the manganese ion percolation through the lattice in the MnXTm1‒XSe system has been established. The change of the current carrier type upon variation in the temperature and substitution concentration was determined from the Seebeck coefficient. A high-temperature extremum of thermopower was revealed, which is explained within the framework of the Anderson model.
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