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Воронов, Владимир Николаевич.
Исследование локальных парамагнитных центров перовскитоподобных кристаллов методом ЭПР / В. Н. Воронов, Э. А. Петраковская // Физ. тверд. тела. - 2013. - Т. 55, Вып. 4. - С. 671-677. - Работа поддержана проектом НШ 4828.2012.2
Аннотация: В монокристаллах ScF3 (чистого и допированного), а также в кристаллах Rb2KScF6, Rb2KDyF6 с перовскитоподобной структурой обнаружены и исследованы точечные нанодефекты (вакансии на месте трехвалентных катионов). Исследования локальных парамагнитных центров, которые не регистрируются рентгенографией, проводились методом ЭПР. Угловая зависимость спектров указывает на локальное искажение кубической симметрии кристаллов. Наличие дополнительной сверхтонкой структуры в наблюдаемых спектрах обусловлено делокализацией электронов по шести ионам F-, образующим первый координационный полиэдр вокруг вакансии. Изученные кристаллы характеризуются большой электронной подвижностью и высокой скоростью электронов, зависящей от примеси. Высокая подвижность электронов катионного центра может быть косвенной причиной структурного фазового перехода в кристалле ScF3 при воздействии одноосного давления.

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Переводная версия EPR investigation of local paramagnetic centers in perovskite-like crystals. - [Б. м. : б. и.]

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Петраковская, Элеонора Анатольевна; Petrakovskaya, E.A.; Voronov V.N.
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Voronov, V. N.
EPR investigation of local paramagnetic centers in perovskite-like crystals / V. N. Voronov, E. A. Petrakovskaya // Phys. Solid State. - 2013. - Vol. 55, Is. 4. - P. 730-736DOI 10.1134/S1063783413040367
Аннотация: In ScF3 single crystals (pure and doped) as well as in Rb2KScF6 and Rb2KDyF6 crystals with a perovskite-like structure, point nanodefects (vacancy in place of trivalent cations) have been found and studied. Electron paramagnetic resonance has been used to investigate local paramagnetic centers that are not detected using X-ray diffraction. The angular dependence of the spectra indicates a local distortion of the cubic symmetry of the crystals. An additional hyperfine structure in the observed spectra is due to the delocalization of electrons over six F− ions forming the first coordination polyhedron around the vacancy. The crystals studied are characterized by a high electron mobility and a high electron velocity, which depends on the impurity. The high mobility of electrons of the cation center can be indirectly responsible for the structural phase transition occurring in the ScF3 crystal under uniaxial pressure.

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Публикация на русском языке Воронов, Владимир Николаевич. Исследование локальных парамагнитных центров перовскитоподобных кристаллов методом ЭПР / В. Н. Воронов // Физика твердого тела. - 2013. - Т. 55, Вып. 4. - С. 671-677

Доп.точки доступа:
Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Воронов, Владимир Николаевич
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    Синтез, структура, ЭПР спектры и теплоемкость кубического оксифторида CsZnMoO3F3 / М. С. Молокеев [и др.] // Вестник СибГАУ. - 2013. - № 3. - С. 224-227. - Работа выполнена при финансовой поддержке ФЦП «Научные и научно-педагогические кадры инновационной России» на 2009–2013 гг., № 8379
   Перевод заглавия: Synthesis, structure, epr spectra and heat capacity of cubic CsZnMoO3F3 oxyfluoride
Кл.слова (ненормированные):
оксифторид -- рентгеноструктурный анализ -- ЭПР спектры -- теплоемкость -- oxyfluoride -- X-ray powder diffraction -- EPR -- heat capacity
Аннотация: Оксифторид CsZnMoO3F3 получен методом твердофазного синтеза. Установлено, что кристалл изоструктурен пирохлору и уточнена его кристаллическая структура при T = 298 K методом Ритвельда. Несмотря на то, что основным структурным элементом в этом соединении является искаженный полиэдр, реализовалась кубическая фаза. Стабильность кубической фазы подтверждена исследованием теплоемкости в температурном интервале T = 110–293 K. Проанализированы ЭПР спектры исследуемого соединения в диапазоне температур T = 77–295 K. Установлено наличие дефектов в структуре. Проведено сравнение исследуемого соединения с родственным оксифторидом CsMnMoO3F3. Отмечено лишь небольшое изменение тепловых параметров и параметров ячеек.
Oxyfluoride CsZnMoO3F3 has been prepared with the solid state synthesis. It was found that crystal is isostructural to pyrochlore and its crystal structure was defined with the Rietveld method more exactly. Despite the fact that the main structural element in this compound is distorted polyhedron, the cubic phase has been realized. The stability of the cubic phase over the temperature range T = 110–293 K was proved by the heat capacity measurement. The EPR spectra were analyzed over the range of 77–295 K. The presence of defects was revealed. The comparison between compound under investigation and CsMnMoO3F3 was implemented. Just a tiny change of the thermal parameters and the cell parameters was registered.

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Молокеев, Максим Сергеевич; Molokeev, M.S.; Петраковская, Элеонора Анатольевна; Petrakovskaya, E.A.; Бондарев, Виталий Сергеевич; Bondarev, V. S.; Колесникова, Евгения Михайловна; Kolesnikova, E. M.; Иванов, Н. А.
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Magneto-optical activity of crude oil and its heavy fractions / A. E. Sokolov [et al.] // Opt. Spectrosc. - 2012. - Vol. 112, Is. 5. - P. 755-762, DOI 10.1134/S0030400X12050165. - Cited References: 18. - This work was performed under Interdisciplinary Integration Project no. 118 of the Siberian Branch of the Russian Academy of Sciences (2009-2011). . - ISSN 0030-400X

РУБ Optics + Spectroscopy
Рубрики:
MAGNETIC CIRCULAR-DICHROISM
   SINGLE-CRYSTALS
   SPECTROSCOPY
   EPR
   ABSORBENCY
   PORPHYRIN
   SYSTEMS
Аннотация: We have experimentally studied optical and magneto-optical spectra of solutions of crude oils of different origin and their heavy fractions in the visible spectral range. Magnetic circular dichroism of oil in the wavelength range similar to 550 nm has been revealed. We show that the shape of the spectra of this dichroism depends on the origin of crude oil, with the magnetic dichroism magnitude being proportional to the concentration of the oil in the solution. A comparison of the data of magneto-optical spectroscopy with electron paramagnetic resonance spectra and chemical composition of samples has allowed us to conclude that the observed magneto-optical activity is determined by the occurrence of VO2+ complexes in the oil samples. The revealed magneto-optical activity of crude oil can form the basis of a unique method of analysis of the composition and properties of oils of different origin and heavy fractions thereof.

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Публикация на русском языке Магнитооптическая активность природной нефти и ее тяжелых фракций [Текст] / А. Э. Соколов [и др.] // Оптика и спектроскопия : Наука, 2012. - Т. 112 № 5. - С. 820-827

Держатели документа:
[Sokolov, A. E.
Edelman, I. S.
Zabluda, V. N.
Petrakovskaya, E. A.
Aleksandrovskii, A. S.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Shubin, A. A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Trukhan, S. N.
Mart'yanov, O. N.] Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia

Доп.точки доступа:
Sokolov, A. E.; Соколов, Алексей Эдуардович; Edelman, I. S.; Эдельман, Ирина Самсоновна; Zabluda, V. N.; Заблуда, Владимир Николаевич; Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Shubin, A. A.; Trukhan, S. N.; Mart'yanov, O. N.
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    EPR study of Gd3+ local structure in ScF3 crystal with negative thermal expansion coefficient / A. Antuzevics [et al.] // Phys. Scr. - 2015. - Vol. 90, Is. 11. - Ст. 115801, DOI 10.1088/0031-8949/90/11/115801. - Cited References: 32. - We are grateful to Professor S Ovchinnikov for providing ScFINF3/INF samples. This work was supported by L-KC-11-0005 project Nr.KC/2.1.2.1.1/10/01/006,5.3 . - ISSN 0031-8949
   Перевод заглавия: ЭПР исследование локальной структуры гадолиния в кристалле трехфтористого скандия с отрицательным коэффициентом теплового расширения

РУБ Physics, Multidisciplinary
Рубрики:
ELECTRON-PARAMAGNETIC-RESONANCE
   SPIN-HAMILTONIAN PARAMETERS
   SINGLE-CRYSTALS
   SUPERPOSITION-MODEL
   CENTERS
   SPECTRA
   PHASE
   TEMPERATURE
   SIMULATION
Кл.слова (ненормированные):
electron paramagnetic resonance -- Gd3+ -- ScF3 -- negative thermal expansion
Аннотация: Zero field splitting (ZFS) of Gd3+ impurity in ScF3 is studied by electron paramagnetic resonance at 77 and 295 K. ZFS parameter b4 values obtained from angular dependence simulations show that regardless of negative thermal expansion in ScF3 temperature dependence of |b4| is similar to other cubic fluoroperovskites. Our analysis of ZFS parameters indicates that the local structure of Gd3+ centres expands positively with temperature. © 2015 The Royal Swedish Academy of Sciences.

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Держатели документа:
Institute of Solid State Physics, University of Latvia, Kengaraga Str. 8, Riga, Latvia
L. V. Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Antuzevics, A.; Rogulis, U.; Fedotovs, A.; Berzins, D.; Voronov, V. N.; Воронов, Владимир Николаевич; Purans, J.
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Magnetic circular dichroism analysis of crude oil / I. S. Edelman [et al.] // J. Struct. Chem. - 2016. - Vol. 57, Is. 2. - P. 382-389, DOI 10.1134/S0022476616020207. - Cited References:33. - The work was carried out with the partial support of the grant of the President of the Russian Federation (NSh-2886.2014.2), and in the frameworks of the base budget financing of Kirensky Institute of Physics and Boreskov Institute of Catalysis (Siberian Branch, Russian Academy of Sciences) (V.44.1.15.). . - ISSN 0022-4766. - ISSN 1573-8779

РУБ Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
Near-UV/visible spectroscopy
   Electron-spin-resonance
   Asphaltene dispersions
   Single-crystals
   Absorption
   VO2+
   EPR
   FLuorescence
   Aggregation
   Absorbency
Кл.слова (ненормированные):
magnetic circular dichroism (MCD) -- MCD spectroscopy -- absorption spectroscopy of oil
Аннотация: Optical and magneto-optical properties of solutions of crude oil of different origin (i.e., taken from different fields) are studied in the visible and near-UV region of optical emission. Magnetic circular dichroism (MCD) spectra of oil are obtained in the vicinity of wavelengths of ~410 nm, 533 nm, and 576 nm. It is demonstrated that the intensity of the MCD signal depends on the origin of crude oil, and it is proportional to the oil concentration in the solution. The comparison of the magneto-optical spectroscopy data with the chemical composition of samples allows us to conclude that the observed magneto-optical activity is determined by the presence of VO2+ complexes in the oil samples studied. The revealed magneto-optical activity of conventional oil can form a basis of a new method for the analysis of the composition and properties of oil of different origin.

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Публикация на русском языке Исследование природной нефти с помощью спектроскопии магнитного кругового дихроизма [Текст] / И. С. Эдельман [и др.] // Журн. структ. химии. - 2016. - Т. 57 № 2. - С. 394-401

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk, Russia.

Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Sokolov, A. E.; Соколов, Алексей Эдуардович; Zabluda, V. N.; Заблуда, Владимир Николаевич; Shubin, A. A.; Martyanov, O. N.; Russian Federation [NSh-2886.2014.2]; Kirensky Institute of Physics (Siberian Branch, Russian Academy of Sciences) [V.44.1.15]; Boreskov Institute of Catalysis (Siberian Branch, Russian Academy of Sciences) [V.44.1.15]
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Magnetic and EPR studies of the EuFe3(BO3)(4) single crystal / V. P. Dyakonov [et al.] // Eur. Phys. J. B. - 2010. - Vol. 78, Is. 3. - P. 291-298, DOI 10.1140/epjb/e2010-10059-3. - Cited References: 23. - A.A. Prokhorov is grateful to Mianowski Fund for financial support. . - ISSN 1434-6028

РУБ Physics, Condensed Matter
Рубрики:
EARTH
GDFE3(BO3)(4)
MULTIFERROICS
Кл.слова (ненормированные):
Absorption lines -- Antiferromagnetic orderings -- Applied magnetic fields -- Basal planes -- Easy direction of magnetizations -- Electron paramagnetic resonance -- EPR measurements -- EPR spectra -- EPR studies -- Europium ions -- Exchange fields -- G factors -- Lorentz -- Magnetic measurements -- Magnetic subsystems -- Orientation dependence -- Sub-lattices -- Temperature dependence -- Temperature range -- Trigonal symmetry -- Zeeman effect -- Antiferromagnetism -- Crystal orientation -- Europium -- Magnetic fields -- Magnetic moments -- Magnetic variables measurement -- Magnetization -- Paramagnetic resonance -- Paramagnetism -- Single crystals -- Spectroscopy -- Electron spin resonance spectroscopy
Аннотация: Magnetic and electron paramagnetic resonance (EPR) properties of EuFe3(BO3)(4) single crystals have been studied over the temperature range of 300-4.2 K and in a magnetic field up to 5 T. The temperature, field and orientation dependences of susceptibility, magnetization and EPR spectra are presented. An antiferromagnetic ordering of the Fe subsystem occurs at about 37 K. The easy direction of magnetization perpendicular to the c axis is determined by magnetic measurements. Below 10 K, we observe an increase of susceptibility connected with the polarization of the Eu sublattice by an effective exchange field of the ordered Fe magnetic subsystem. In a magnetic field perpendicular to the c axis, we have observed an increase of magnetization at T < 10 K in the applied magnetic field, which can be attributed to the appearance of the magnetic moment induced by the magnetic field applied in the basal plane. According to EPR measurements, the distance between the maximum and minimum of derivative of absorption line of the Lorentz type is equal to 319 Gs. The anisotropy of g-factor and linewidth is due to the influence of crystalline field of trigonal symmetry. The peculiarities of temperature dependence of both intensity and linewidth are caused by the influence of excited states of europium ion (Eu3+). It is supposed that the difference between the g-factors from EPR and the magnetic measurements is caused by exchange interaction between rare earth and Fe subsystems via anomalous Zeeman effect.

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Держатели документа:
[Dyakonov, V. P.
Szymczak, R.
Berkowski, M.
Szymczak, H.] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
[Dyakonov, V. P.
Prokhorov, A. D.
Zubov, E.
Prokhorov, A. A.
Varyukhin, V.] NANU, AA Galkin Donetsk Physicotech Inst, UA-83114 Donetsk, Ukraine
[Petrakovskii, G.
Bezmaternikh, L.] RAS, SB, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Institute of Physics, PAS, Al. Lotnikyw 32/46, Warsaw 02-668, Poland
A.A. Galkin Donetsk Physico-Technical Institute, NANU, R. Luxembourg str. 72, Donetsk 83114, Ukraine
L.V. Kirenski Institute of Physics, SB of RAS, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Dyakonov, V. P.; Szymczak, R.; Prokhorov, A. D.; Zubov, E.; Prokhorov, A. A.; Petrakovskii, G. A.; Петраковский, Герман Антонович; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Berkowski, M.; Varyukhin, V.; Szymczak, H.
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EPR study of the Jahn-Teller effect of Cu2+ ions in ZnGa2O4 / A. M. Vorotynov [et al.] // Phys. Solid State. - 2010. - Vol. 52, Is. 11. - P. 2415-2418, DOI 10.1134/S1063783410110314. - Cited References: 12 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
MAGNETIC-PROPERTIES
PARTICLES
CUFE2O4
Аннотация: The Jahn-Teller effect in the ZnGa2O4 spinel single crystal has been investigated using electron paramagnetic resonance of Cu2+ ions in the temperature range 110-560 K. It has been shown that copper ions occupy octahedral sites 16d in the ZnGa2O4 crystal with cubic symmetry O (h) (7) (Fd-3m). At T 560 K, the octahedra undergo tetragonal distortions (predominantly tension) and rotation around the fourfold axes by the angle theta a parts per thousand 2.6A degrees. The parameters of the spin Hamiltonian, which characterize the prolate (g (aEuro-)

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Держатели документа:
[Vorotynov, A. M.
Petrakovskii, G. A.
Sablina, K. A.
Bovina, A. F.
Vasil'ev, A. D.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Vorotynov, A. M.; Воротынов, Александр Михайлович; Petrakovskii, G. A.; Петраковский, Герман Антонович; Sablina, K. A.; Саблина, Клара Александровна; Bovina, A. F.; Бовина, Ася Федоровна; Vasil'ev, A. D.; Васильев, Александр Дмитриевич
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Two-phase paramagnetic-ferromagnetic state of La0.7Pb0.3MnO3 single-crystal lanthanum manganite / N. V. Volkov [et al.] // Phys. Solid State. - 2002. - Vol. 44, Is. 7. - P. 1350-1354, DOI 10.1134/1.1494635. - Cited References: 17 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
COLOSSAL MAGNETORESISTANCE
   MAGNETIC-RESONANCE
   DOPED MANGANITES
   LA1-XCAXMNO3
   SEPARATION
   TRANSITION
   RELAXATION
   EPR
Аннотация: Two phases, paramagnetic and ferromagnetic, were shown by the magnetic resonance method to coexist below the temperature T-C in La0.7Pb0.3MnO3 single crystals exhibiting colossal magnetoresistance. The magnetic resonance spectra were studied in the frequency range 10-78 GHz. The specific features in the behavior of the spectral parameters were observed to be the strongest at the temperatures corresponding to the maximum magnetoresistance in the crystals. The concentration ratios of the paramagnetic and ferromagnetic phases in the samples were found to be sensitive to variations in temperature and external magnetic field. This behavior suggests realization of the electronic phase separation mechanism in the system under study. (C) 2002 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Volkov, N. V.; Волков, Никита Валентинович; Petrakovskii, G. A.; Петраковский, Герман Антонович; Vasil'ev, V. N.; Sablina, K. A.; Саблина, Клара Александровна
}
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10.

Density-functional model cluster studies of EPR g tensors of F-s(+) centers on the surface of MgO / C. . Di Valentin [et al.] // J. Chem. Phys. - 2006. - Vol. 124, Is. 4. - Ст. 44708, DOI 10.1063/1.2161190. - Cited References: 37 . - ISSN 0021-9606

РУБ Physics, Atomic, Molecular & Chemical
Рубрики:
ELECTRONIC G-TENSORS
   CORRELATION-ENERGY
   MGO(001) SURFACE
   OXYGEN VACANCIES
   SPIN-ORBIT
   G-VALUES
   ATOMS
   APPROXIMATION
   COMPLEXES
   MOLECULES
Кл.слова (ненормированные):
Density-functional model cluster -- Single-crystalline thin films -- Spin-orbit interaction -- Anisotropy -- Paramagnetic resonance -- Single crystals -- Tensors -- Thin films -- Magnesium compounds
Аннотация: We report g tensors of surface color centers, so-called F-s(+) centers, of MgO calculated with two density-functional approaches using accurately embedded cluster models. In line with recent UHV measurements on single-crystalline MgO film, we determined only small g-tensor anisotropies and negative shifts Delta g equivalent to g-g(e) for all F-s(+) sites considered, namely, (001)-terrace, step, edge, and corner sites. The g values are very sensitive to the local structure of the defect: relaxation reverses the sign of Delta g. However, accounting for the spin-orbit interaction either self-consistently or perturbatively yields very similar results. In addition to the values of the tensor components, their direction with respect to the surface was determined. In contrast to edges, significant deviations from ideal C-2v symmetry were found for F-s(+) centers at steps. Recent data on single-crystalline thin films are reevaluated in the light of these results. (c) 2006 American Institute of Physics.

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Держатели документа:
ICREA, Barcelona 08010, Spain
Univ Barcelona & Parc Cientif Barcelona, Dept Quim Fis, Barcelona 08028, Spain
Univ Barcelona & Parc Cientif Barcelona, Ctr Especial Recerca Quim Teor, Barcelona 08028, Spain
Max Planck Gesell, Fritz Haber Inst, Dept Phys Chem, D-14195 Berlin, Germany
Russian Acad Sci, Inst Chem & Chem Technol, Krasnoyarsk 660049, Russia
Univ Milan Bicocca, Dipartimento Sci Mat, I-20125 Milan, Italy
Tech Univ Munich, Dept Chem Theoret Chem, D-85747 Garching, Germany
ИХХТ СО РАН
Dipartimento di Scienza dei Materiali, Universit? degli Studi Milano-Bicocca, 20125 Milano, Italy
Institucio Catalana de Recerca i Estudis Avanats (ICREA), 08010 Barcelona, Spain
Departament de Quimica Fisisca, Centre Especial de Recerca en Quimica Teorica, Parc Cientific de Barcelona, 08028 Barcelona, Spain
Fritz-Haber Institut, Max-Planck Gesellschaft, Department of Chemical Physics, Faradayweg 4-6, D-14195 Berlin, Germany
Institute of Chemistry and Chemical Technology, Russian Academy of Sciences, 660049 Krasnoyarsk, Russian Federation
Department Chemie, Theoretische Chemie, Technische Universitat Munchen, 85747 Garching, Germany

Доп.точки доступа:
Di Valentin, C.; Neyman, K. M.; Risse, T.; Sterrer, M.; Fischbach, E.; Freund, H. J.; Nasluzov, V. A.; Pacchioni, G.; Rosch, N.
}
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11.

Berzhansky, V. N.
Magnetic-field effect on the critical epr-dynamics of the cubic ferromagnets CDCR2SE4 and CDCR2S4 / V. N. Berzhansky, V. I. Ivanov, A. V. Lazuta // Solid State Commun. - 1982. - Vol. 44, Is. 6. - P. 771-775, DOI 10.1016/0038-1098(82)90271-X. - Cited References: 9 . - ISSN 0038-1098

РУБ Physics, Condensed Matter

WOS,
Scopus
Держатели документа:
LV KIRENSKII PHYS INST,KRASNOYARSK 660036,USSR
BP KONSTANTINOV NUCL PHYS INST,GATCHINA 188350,USSR
ИФ СО РАН
Доп.точки доступа:
Ivanov, V. I.; Lazuta, A. V.; Бержанский, Владимир Наумович
}
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12.

Vorotynov, A. M.
EPR-studies of MnxV1-xS systems / A. M. Vorotynov, G. V. Loseva // Fiz. Tverd. Tela. - 1996. - Vol. 38, Is. 3. - P. 933-938. - Cited References: 5 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

WOS
Доп.точки доступа:
Loseva, G. V.
}
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13.

    Magnetic properties of Cu1.8Mn1.2BO5 crystal / I. L. Rasskazov [et al.] // Asia-Pacific EPR/ESR Symp. (APES-2016) : book of abstracts. - 2016. - Ст. PO-31. - P. 125. - This work was supported by the RFBR no 16-32-50083
   Перевод заглавия: Магнитные свойства кристалла Cu1.8Mn1.2BO5

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Доп.точки доступа:
Eremina, R. M.; Yatsyk, I. V; Moshkina, E. M.; Мошкина, Евгения Михайловна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Krug von Nidda, H.-A.; Liodl, A.; Asia-Pacific EPR/ESR Symposium(2016 ; 28 Aug.- 02 Sept. ; Lake Baikal, Irkutsk, Russia); Институт органической химии им. Н.Н. Ворожцова Сибирского отделения РАН; Институт химии им. А. Е. Фаворского СО РАН
}
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14.

EPR-determined anisotropy of the g-factor and magnetostriction of a Cu2MnBO5 single crystal with a ludwigite structure / A. A. Dubrovskiy [et al.] // JETP Letters. - 2017. - Vol. 106, Is. 11. - P. 716-719, DOI 10.1134/S0021364017230072. - Cited References:18. - This study was supported jointly by the Russian Foundation for Basic Research and the Government of the Krasnoyarsk Territory (project no. 16-42-243028). . - ISSN 0021-3640. - ISSN 1090-6487
Рубрики:
ELECTRON-SPIN-RESONANCE
Аннотация: Electron paramagnetic resonance (EPR) and magnetostriction of the Cu2MnBO5 single crystal have been studied. The EPR spectrum consists of a single Lorentzian line due to the exchange-coupled system of spins of Cu2+ and Mn3+ ions. It has been established experimentally that the g-factor in the paramagnetic region is strongly anisotropic and anomalously small, which is not typical of the exchange-coupled system of spins of Cu2+ and Mn3+ ions. At a temperature of 150 K, the g-factors along the crystallographic a, b, and c axes are 2.04, 1.96, and 1.87, respectively. Such small effective g-factor values can be due to the effect of the anisotropic Dzyaloshinskii-Moriya exchange interaction between the spins of Cu2+ and Mn3+ ions directed along the a axis. The presence of two Cu2+ and Mn3+ Jahn-Teller ions occupying four nonequivalent positions in the crystal is responsible for the absence of the inversion center. It is found that the behavior of the magnetostriction of Cu2MnBO5 is not typical of transition-metal crystals but is closer to the behavior of crystals containing rare-earth ions.

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Публикация на русском языке Анизотропия g-фактора, определенная методом ЭПР, и магнитострикция монокристалла Cu2MnBO5 со структурой людвигита [Текст] / А. А. Дубровский [и др.] // Письма в Журн. эксперим. и теор. физ. - 2017. - Т. 106 Вып. 11. - С. 685-688

Держатели документа:
Russian Acad Sci, Siberian Branch, Fed Res Ctr KRC, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Zavoisky Phys Tech Inst, Kazan 420029, Russia.

Доп.точки доступа:
Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Moshkina, E. M.; Мошкина, Евгения Михайловна; Yatsyk, I. V.; Eremina, R. M.; Russian Foundation for Basic Research; Government of the Krasnoyarsk Territory [16-42-243028]
}
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15.

    Ovchinnikov, S. G.
    Weak Ferromagnetism along the Triad Axis and the Basal Anisotropy Caused by the Dzyaloshinskii-Moriya Interaction and the Cubic Electric Field of the FeBO3 Crystal / S. G. Ovchinnikov, V. V. Rudenko, A. M. Vorotynov // J. Exp. Theor. Phys. - 2019. - Vol. 128, Is. 3. - P. 443-449, DOI 10.1134/S1063776119020110. - Cited References: 18 . - ISSN 1063-7761. - ISSN 1090-6509
Рубрики:
MN2+
   EPR
Аннотация: Based on the spin Hamiltonian and taking into account the cubic invariant of the crystal field and the Dzyaloshinskii-Moriya interaction, the weak ferromagnetic moment along the triad axis and the basal anisotropy of FeBO3 crystals are calculated in the approximation of second-order perturbation theory.

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Публикация на русском языке Овчинников, Сергей Геннадьевич. Слабый ферромагнетизм вдоль оси третьего порядка и базисная анизотропия, вызванные взаимодействием Дзялошинского-Мория и кубическим электрическим полем кристаллов FeBO3 [Текст] / С. Г. Овчинников, В. В. Руденко, А. М. Воротынов // Журн. эксперим. и теор. физ. - 2019. - Т. 155 Вып. 3. - С. 514-521

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Rudenko, V. V.; Руденко, Валерий Васильевич; Vorotynov, A. M.; Воротынов, Александр Михайлович; Овчинников, Сергей Геннадьевич
}
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16.

Lundin, A. A.
Multiple-quantum NMR spectroscopy and quantum information delocalization in solids in the presence of magnetic fields inhomogeneities / A. A. Lundin, V. E. Zobov // International Conference “Magnetic Resonance – Current State and Future Perspectives” (EPR-75) : book of abstracts. - Kazan, 2019. - P. 30. - Cited References: 5

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Держатели документа:
N.N. Semenov Institute of Chemical Physics, RAS
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia

Доп.точки доступа:
Zobov, V. E.; Зобов, Владимир Евгеньевич; Лундин, Андрей Арнольдович; "Magnetic Resonance - Current State and Future Perspectives", International Conference(2019 ; Sept. ; 23-27 ; Kazan, Russia); Казанский (Приволжский) федеральный университет; Казанский физико-технический институт им. Е. К. Завойского Казанского научного центра РАН
}
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17.

Zobov, V. E.
Associative memory on qutrits by means of quantum annealing / V. E. Zobov, I. S. Pichkovskiy // International Conference “Magnetic Resonance – Current State and Future Perspectives” (EPR-75) : book of abstracts. - Kazan, 2019. - P. 63. - Cited References: 6

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia

Доп.точки доступа:
Pichkovskiy, I. S.; Зобов, Владимир Евгеньевич; "Magnetic Resonance - Current State and Future Perspectives", International Conference(2019 ; Sept. ; 23-27 ; Kazan, Russia); Казанский (Приволжский) федеральный университетКазанский физико-технический институт им. Е. К. Завойского Казанского научного центра РАН
}
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18.

Influence of magnetic nanoparticles on cells of Ehrlich ascites carcinoma / S. V. Stolyar, O. V. Kryukova, R. N. Yaroslavtsev [et al.] // AIP Adv. - 2021. - Vol. 11, Is. 1. - Ст. 015019, DOI 10.1063/9.0000165. - Cited References: 22. - The electron microscopy and magnetic resonance study was carried out on the equipment of the Krasnoyarsk Territorial Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences. This work was supported by the Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific Schools (project no. MK-1263.2020.3). The research was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20-42-242902 . - ISSN 2158-3226
Кл.слова (ненормированные):
High resolution transmission electron microscopy -- Iron compounds -- Arabinogalactan -- Ehrlich ascites carcinoma -- EPR signals -- Iron complex -- NO molecule -- Ssbauer spectroscopies -- Magnetic nanoparticles
Аннотация: The effect of magnetic nanoparticles coated with arabinogalactan on the viability of Ehrlich ascites carcinoma (EAC) cells was studied. The nanoparticles were studied by transmission electron microscopy, Mossbauer spectroscopy, IR spectroscopy, and ferromagnetic resonance. A correlation between the proportion of dead EAC cells in suspension and the intensity of the EPR signal of dinitrosyl iron complexes was found. This result may be due to the presence of NO molecules.

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Держатели документа:
Krasnoyarsk Scientific Center, Federal Research Center Ksc Sb Ras, Krasnoyarsk, 660036, Russian Federation
Kirensky Institute of Physics, Federal Research Center Ksc Sb Ras, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Stolyar, S. V.; Kryukova, O. V.; Yaroslavtsev, R. N.; Bayukov, O. A.; Баюков, Олег Артемьевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Gerasimova, Yu. V.; Герасимова, Юлия Валентиновна; Pyankov, V. F.; Latyshev, N. V.; Shestakov, N. P.; Шестаков, Николай Петрович
}
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19.

Vorotynov, A. M.
EPR study of the single-ion magnetic anisotropy of the Fe3+ ion in a diamagnetic PbGaBO4 crystal / A. M. Vorotynov, A. I. Pankrats, M. I. Kolkov // J. Exp. Theor. Phys. - 2021. - Vol. 133, Is. 5. - P. 574-580, DOI 10.1134/S1063776121110054. - Cited References: 19. - This work was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory, and the Krasnoyarsk Regional Science Foundation (project no. 20-42-240006 "Synthesis and study of oxide single crystals containing Pb2+ and Bi3+ with partial substitution in one of the subsystems: magnetic structures and magnetodielectric effect") . - ISSN 1063-7761. - ISSN 1090-6509

РУБ Physics, Multidisciplinary
Рубрики:
ELECTRON PARAMAGNETIC RESONANCE
TRANSITION
SrTiO3
Аннотация: Crystals of a diamagnetic PbGaBO4 analog containing a small amount (about 0.5 at %) of Fe3+ ions are grown. The single-ion EPR spectra of Fe3+ in PbGa1-xFexBO4 single crystals are analyzed with allowance for a crystal structure. The existence of four magnetically nonequivalent positions of Fe3+ ions with different local anisotropy axis directions has been confirmed. The parameters of the spin Hamiltonian written in the approximation of the local orthorhombic symmetry of a paramagnetic center are determined. The values of single-ion anisotropy constants, which are unusually high for S ions, is shown to be caused by a strong distortion of the ligand environment of Fe3+ ions. The single-ion contribution to the energy of the total magnetic anisotropy of a magnetically concentrated PbGaBO4 crystal is estimated. Two-ion mechanisms of the Fe–Fe interaction anisotropy are assumed to play a dominant role in the formation of magnetic anisotropy in a magnetically concentrated crystal.

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Публикация на русском языке Воротынов, Александр Михайлович. Исследование одноионной магнитной анизотропии иона Fe3+ методом ЭПР в диамагнитном кристалле PbGaBO4 [Текст] / А. М. Воротынов, А. И. Панкрац, М. И. Колков // Журн. эксперим. и теор. физ. - 2021. - Т. 160 Вып. 5. - С. 670-677

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Pankrats, A. I.; Панкрац, Анатолий Иванович; Kolkov, M. I.; Колков, Максим Игоревич; Воротынов, Александр Михайлович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk Territory; Krasnoyarsk Regional Science Foundation [20-42-240006]
}
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20.

    Competitive site occupation toward improved quantum efficiency of SrLaScO4:Eu red phosphors for warm white LEDs / Z. Y. Yang, G. C. Liu, Y. F. Zhao [et al.] // Adv. Opt. Mater. - 2022. - Vol. 10. Is. 6. - Ст. 2102373, DOI 10.1002/adom.202102373. - Cited References: 42. - This research was supported by the International Cooperation Project of National Key Research and Development Program of China (Program No. 2021YFE0105700), National Natural Science Foundation of China (Grant Nos. 51972118 and 51961145101), Guangzhou Science & Technology Project (Project No. 202007020005), the State Key Laboratory of Luminescent Materials and Devices (Grant No. Skllmd-2021-09), China Postdoctoral Science Foundation (Grant No. 2021M691053), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (Program No. 2017BT01X137). This work was also funded by RFBR according to the research Project No. 19-52-80003 and the NRF International: SA/China Joint Research Programme 2021 - CHIN2002265 06921 UID 132785 . - ISSN 2195-1071
   Перевод заглавия: Конкурентное заселение позиций для повышения квантовой эффективности красных люминофоров SrLaScO4:Eu для тепло-белых светодиодов

РУБ Materials Science, Multidisciplinary + Optics
Рубрики:
LUMINESCENCE
   EUROPIUM
   BLUE
   EU2+
   STABILIZATION
   EPR
Кл.слова (ненормированные):
light-emitting diodes -- photoluminescence -- red emission
Аннотация: The discovery of Eu2+-doped high-efficiency red phosphors remains a vital challenge for white light-emitting diode (WLED) applications. It is therefore urgent to find effective strategies managing the oxidation state to help reduce Eu3+ to Eu2+ and accordingly increase the photoluminescence quantum yield (PLQY). Herein, a new red-emitting SrLaScO4:Eu phosphor is designed, and the PLQY is enhanced from 13% to 67% under 450 nm excitation by employing (NH4)2SO4-assisted sintering. Combined structural analysis, optical spectroscopy, and theoretical calculation reveal that predominant Eu2+ prefers to occupy the Sr2+ sites in the SrLaScO4 enabling red emission, and a competitive site occupation of Eu3+ in La3+ can be restrained, and the reduction mechanism of Eu3+ to Eu2+ originating from the (NH4)2SO4 addition is analyzed. The fabricated WLED device using red-emitting SrLaScO4:Eu and yellow-emitting Y3(Al,Ga)5O12:Ce3+ exhibits a high color-rendering index of 86.7 at a low correlated color temperature of 4005 K. This work provides a feasible reduction strategy for guiding the development of high-efficiency Eu2+-doped red phosphor for WLED applications.

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Держатели документа:
South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China.
City Univ Hong Kong, Dept Chem, Kowloon, Hong Kong 999077, Peoples R China.
KSC SB RAS, Lab Crystal Phys, Kirensky Inst Phys, Fed Res Ctr, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Engn Phys & Radioelect, Krasnoyarsk 660041, Russia.
Kemerovo State Univ, Res & Dev Dept, Kemerovo 650000, Russia.
Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa.
South China Univ Technol, Sch Phys & Optoelect, Guangzhou 510641, Peoples R China.

Доп.точки доступа:
Yang, Zhiyu; Liu, Gaochao; Zhao, Yifei; Zhou, Yayun; Qiao, Jianwei; Molokeev, M. S.; Молокеев, Максим Сергеевич; Swart, Hendrik C.; Xia, Zhiguo; International Cooperation Project of National Key Research and Development Program of China [2021YFE0105700]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [51972118, 51961145101]; Guangzhou Science & Technology Project [202007020005]; State Key Laboratory of Luminescent Materials and Devices [Skllmd-2021-09]; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2021M691053]; Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01X137]; RFBRRussian Foundation for Basic Research (RFBR) [19-52-80003]; NRF International: SA/China Joint Research Programme 2021 [CHIN2002265 06921 UID 132785]
}
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