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1.
Aplesnin, S. S.
Regulation of the
thermopower
and ultrasound by magnetic field in manganese sulfide doped with variable-valence ions / S. Aplesnin, A. Kharkov, M. Sitnikov> // Eur. Phys. J. Plus. - 2024. -
Vol. 139
,
Is. 3
. - Ст. 247,
DOI
10.1140/epjp/s13360-024-05032-2. - Cited References: 50. - The study was supported by a grant from the Russian Science Foundation N 23-22-10016, the Krasnoyarsk Regional Science Foundation. The investigation of microstructural properties of the samples was carried out using equipment’s (SEM and TEM) the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS». The authors are grateful to A.V. Shabanov for the scanning electron microscopy investigations . - ISSN 2190-5444
Аннотация:
The effect of cation nonstoichiometry and variable-valence samarium ions on the thermoelectric and structural characteristics of manganese sulfide is studed. Nonstoichiometry leads to a change in the
thermopower
sign in the antiferromagnetic region in a magnetic field and a decrease in the
thermopower
in the paramagnetic region. It is shown that the
thermopower
and Nernst–Ettingshausen coefficient of samarium-substituted manganese sulfide change their signs in the vicinity of structural and electronic transitions established from the thermal expansion coefficient. A decrease in the sound attenuation in a magnetic field is found. A correlation between the temperatures of the change of the sign of the Nernst–Ettingshausen effect and the change in electrosound in a magnetic field is established and explained within the model of carrier diffusion in the phase transition region. The conductivity control by the ultrasound is demonstrated.
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Держатели документа:
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russia
Доп.точки доступа:
Kharkov, A.; Sitnikov, M.; Аплеснин, Сергей Степанович
}
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2.
Kondo effects in
variable-valence manganese-substituted thulium selenide / O. B. Romanova, S. S. Aplesnin, M. N. Sitnikov [et al.]> // Ceram. Int. - 2024. -
Vol. 50
,
Is. 18
,
Pt. B
. - P. 33555-33561,
DOI
10.1016/j.ceramint.2024.06.171. - Cited References: 31. - The authors would like to express their deepest gratitude to the researcher A.I. Galyas from Scientific-Practical Materials Research Center NAS, Minsk for the synthesis of samples MnXTm1-XSe . - ISSN 0272-8842. - ISSN 1873-3956
Кл.слова (ненормированные):
Impedance
--
Magnetic properties
--
Thermopower
--
Kondo effect
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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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russia
Scientific-Practical Materials Research Center NAS, Minsk, 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; Shabanov, A. V.; Шабанов, Александр Васильевич; Goncharov, V.S.; Zhivulko, A.M.; Yanushkevich, K.I.
}
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3.
Aplesnin, S. S.
Electronic transition, ferroelectric and thermoelectric properties of bismuth pyrostannate Bi2(Sn0.85Cr0.15)2O7 / S. S. Aplesnin, L. V. Udod, M. N. Sitnikov> // Ceram. Int. - 2018. -
Vol. 44
,
Is. 2
. - P. 1614-1620,
DOI
10.1016/j.ceramint.2017.10.082. - 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. . - ISSN 0272-8842
Кл.слова (ненормированные):
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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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, Krasnoyarsk, Russian Federation
Siberian State Aerospace University M. F. Reshetnev, Krasnoyarsky Rabochy Av. 31, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Udod, L. V.; Удод, Любовь Викторовна; Sitnikov, M. N.; Аплеснин, Сергей Степанович
}
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4.
Electrical Conductivity and
Thermopower
in CoxMn1-xS Sulfides / G. I. Makovetskii [et al.]> // Phys. Solid State. - 2008. -
Vol. 50
,
Is. 10
. - P. 1826-1829,
DOI
10.1134/S1063783408100065. - Cited References: 6. - This study was supported by the Russian-Belarussian Foundation for Basic Research within the framework of the joint programs RFFI-BRFFI ( project no. RFFI-BRFFI 04-02-81018-Bel-2004a and project no. BRFFI-RFFIF04R-025). . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Аннотация:
This paper reports on the results of investigations into the structural, electrical, and thermoelectrical properties of sulfides CoxMn1-xS (0 0), whereas the compound with x = 0.4 exhibits metallic conduction (alpha 0). It is found that the band gap E-g of the compounds under investigation varies in the range from 1.46 eV for alpha-MnS (x
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Держатели документа:
[Makovetskii, G. I.
Galyas, A. I.
Demidenko, O. F.
Yanushkevich, K. I.] Natl Acad Sci, Joint Inst Solid State & Semicond Phys, Minsk 220072, Byelarus
[Ryabinkina, L. I.
Romanova, O. B.] Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Joint Institute of Solid-State and Semiconductor Physics, National Academy of Sciences of Belarus, ul. Petrusya Brovki 19, Minsk 220072, Belarus
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Makovetskii, G. I.; Galyas, A. I.; Demidenko, O. F.; Yanushkevich, K. I.; Ryabinkina, L. I.; Рябинкина, Людмила Ивановна; Romanova, O. B.; Романова, Оксана Борисовна
}
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5.
Effect of oxygen
nonstoichiometry on electrical conductivity and
thermopower
of Gd0.2Sr0.8FeO3-δ ferrite samples / V. Dudnikov [et al.]> // Materials. - 2019. -
Vol. 12
,
Is. 1
. - Ст. 74,
DOI
10.3390/ma12010074. - Cited References: 24 . - ISSN 1996-1944
Кл.слова (ненормированные):
Rare-earth-substituted cobalt oxides
--
Stability
--
Thermoelectric properties
Аннотация:
The behavior of the resistivity and
thermopower
of the Gd0.2Sr0.8FeO3−δ ferrite samples with a perovskite structure and the sample stability in an inert gas atmosphere in the temperature range of 300–800 K have been examined. It has been established that, in the investigated temperature range, the thermoelectric properties in the heating‒cooling mode are stabilized at δ ≥ 0.21. It is shown that the temperature dependencies of the resistivity obtained at different δ values obey the activation law up to the temperatures corresponding to the intense oxygen removal from a sample. The semiconductor‒semiconductor electronic transitions accompanied by a decrease in the activation energy have been observed with increasing temperature. It is demonstrated that the maximum thermoelectric power factor of 0.1 µW/(cm·K2) corresponds to a temperature of T = 800 K.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, 660036, Russian Federation
Ioffe Institute, St. Petersburg, 194021, Russian Federation
Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Fedorov, A. S.; Федоров, Александр Семенович; Solovyov, L.; Vereshchagin, S.; Burkov, A. T.; Novikov, S.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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6.
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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