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Theoretical study of the magnetic properties of ordered vacancies in 2D hexagonal structures: Graphene, 2D-SiC, and h-BN / N. S. Eliseeva [et al.] // JETP Letters. - 2012. - Vol. 95, Is. 11. - P. 555-559, DOI 10.1134/S0021364012110045. - Cited References: 29 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
INITIO MOLECULAR-DYNAMICS
   METALS
   TRANSITION
   DEFECTS
   STATE
Аннотация: The magnetic properties of vacancies in 2D hexagonal structures-graphene and 2D-SiC and h-BN monolayers-have been studied. It has been found that a local magnetic moment exists in all listed systems in the presence of vacancies. However, in 2D hexagonal silicon carbide, the local magnetic moment appears only in the presence of silicon vacancy. In addition, the effect of the distance between vacancies in a monolayer on transitions between the ferromagnetic and antiferromagnetic states has been revealed.

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Публикация на русском языке Теоретическое исследование магнитных свойств упорядоченных вакансий в 2D гексагональных структурах: графен, 2D-SiC, h-BN [Текст] / Н. С. Елисеева [и др.] // Письма в Журн. эксперим. и теор. физ. : Наука, 2012. - Т. 95 Вып. 11/12. - С. 633-637

Держатели документа:
[Eliseeva, N. S.
Kuzubov, A. A.
Ovchinnikov, S. G.
Serzhantova, M. V.] Siberian Fed Univ, Krasnoyarsk 660028, Russia
[Kuzubov, A. A.] Siberian State Technol Univ, Krasnoyarsk 660049, Russia
[Kuzubov, A. A.
Ovchinnikov, S. G.
Tomilin, F. N.
Fedorov, A. S.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Serzhantova, M. V.] Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
[Fedorov, A. S.] Moscow State Univ Econ Stat & Informat, Krasnoyarsk Branch, Krasnoyarsk 660012, Russia

Доп.точки доступа:
Eliseeva, N. S.; Kuzubov, A. A.; Кузубов, Александр Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Serzhantova, M. V.; Tomilin, F. N.; Томилин, Феликс Николаевич; Fedorov, A. S.; Федоров, Александр Семенович
}
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DFT investigation of the influence of ordered vacancies on elastic and magnetic properties of graphene and graphene-like SiC and BN structures / A. S. Fedorov [et al.] // Phys. Status Solidi B. - 2012. - Vol. 249, Is. 12. - P. 2549-2552, DOI 10.1002/pssb.201200105. - Cited References: 32. - The work was supported by The Ministry of education and science of Russia, project 14.B37.21.0163. The authors express their gratitude to the Joint Supercomputer Center, Russian Academy of Sciences, Moscow and the supercomputer center of the Moscow State University (SKIF-MGU) for the possibility of using their computer clusters to perform all calculations. . - ISSN 0370-1972

РУБ Physics, Condensed Matter
Рубрики:
WALLED CARBON NANOTUBES
   INITIO MOLECULAR-DYNAMICS
   AB-INITIO
   DEFECTS
   STATE
   MONOLAYER
   POINTS
Кл.слова (ненормированные):
boron nitride -- carbon silicide -- elastic properties -- graphene -- magnetic properties -- vacancies
Аннотация: Influence of ordered monovacancies on elastic properties of graphene is theoretically investigated by density functional theory (DFT) calculations. Inverse linear dependence of the graphene Young's modulus on the concentration of vacancies has been revealed and migration rate of the vacancies has been calculated as a function of applied strain. It is shown that the migration rate can be controlled by applying various strains or temperatures. The influence of ordered monovacancies on magnetic properties of graphene as well as graphene-like hexagonal carbon silicide (2D-SiC) and the boron nitride (h-BN) structures is investigated. It is established that the presence of vacancies in all systems yields the appearance of local magnetic moment. However, in 2D-SiC structure the magnetic moment occurs only in the case of a Si vacancy. Influence of the distance between vacancies on the ferromagnetic or anti-ferromagnetic ordering for all structures is established. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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Держатели документа:
[Fedorov, A. S.
Popov, Z. I.
Fedorov, D. A.] RAS, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
[Eliseeva, N. S.
Serjantova, M. V.
Kuzubov, A. A.] Siberian Fed Univ, Krasnoyarsk 660028, Russia

Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Popov, Z. I.; Попов, Захар Иванович; Fedorov, D. A.; Федоров, Дмитрий Александрович; Eliseeva, N. S.; Serjantova, M. V.; Kuzubov, A. A.; Кузубов, Александр Александрович
}
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Nucleation in finite topological systems during continuous metastable quantum phase transitions / O. Fialko [et al.] // Phys. Rev. Lett. - 2012. - Vol. 108, Is. 25. - Ст. 250402, DOI 10.1103/PhysRevLett.108.250402. - Cited References: 31. - We acknowledge stimulating discussions with Jean-Sebastien Caux and Lincoln Carr. A. K. thanks Massey University for hospitality. O. F., M. C. D., and J. B. were supported by the Marsden Fund (Contract No. MAU0910) administrated by the Royal Society of New Zealand. . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
Рубрики:
SYMMETRY-BREAKING
   VORTEX NUCLEATION
   BROKEN SYMMETRY
   THERMALIZATION
   SUPERFLUID
   DYNAMICS
   STATE
Аннотация: Finite topological quantum systems can undergo continuous metastable quantum phase transitions to change their topological nature. Here we show how to nucleate the transition between ring currents and dark soliton states in a toroidally trapped Bose-Einstein condensate. An adiabatic passage to wind and unwind its phase is achieved by explicit global breaking of the rotational symmetry. This could be realized with current experimental technology.

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Держатели документа:
[Fialko, Oleksandr
Delattre, Marie-Coralie
Brand, Joachim] Massey Univ, Ctr Theoret Chem & Phys, Auckland 0745, New Zealand
[Fialko, Oleksandr
Delattre, Marie-Coralie
Brand, Joachim] Massey Univ, New Zealand Inst Adv Study, Auckland 0745, New Zealand
[Kolovsky, Andrey R.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Kolovsky, Andrey R.] Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Fialko, O.; Delattre, M.C.; Brand, J.; Kolovsky, A. R.; Коловский, Андрей Радиевич
}
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Golovnev, N. N.
Enrofloxacinium citrate monohydrate: Preparation, crystal structure, thermal stability and IR-characterization / N. N. Golovnev, A. D. Vasiliev, S. D. Kirik // J. Mol. Struct. - 2012. - Vol. 1021. - P. 112-117, DOI 10.1016/j.molstruc.2012.04.059. - Cited References: 22. - The authors are grateful to the Ministry of Education and Science (Government Contracts # 02.740.11.0629) for the financial support of the investigation. . - ISSN 0022-2860

РУБ Chemistry, Physical
Рубрики:
COCRYSTAL
   ANTIBACTERIAL
   BEHAVIOR
   STATE
   ACID
Кл.слова (ненормированные):
Enrofloxacin -- Citric acid -- Crystal structure -- IR spectra -- Thermal analysis
Аннотация: Enrofloxacinium citrate monohydrate (I), C19H 23FN3O3+В·C6H7O7- В·H2O, [C19H22FN3O3 - enrofloxacin, EnrH] has been crystallized from the mutual solution of citric acid and enrofloxacin in ambient conditions. The colorless crystals have been investigated using X-ray single crystal and powder techniques, and characterized by differential scanning calorimetry, thermogravimetry and infrared spectroscopy. The obtained compound can be considered as a salt with enrofloxacinium in the role of a cation and citrate as an anion. The ions ratio equals to 1:1. The compound crystallizes in the triclinic lattice with a = 9.0489(8) A, b = 9.6531(8) A, c = 14.913(1) A, ? = 98.813(1)В°, ? = 92.029(1)В°, ? = 91.013(1)В°, Z = 2, V = 1286.1(2) A3, S.G. P1?. The crystal structure determination reveals the importance of inter- and intramolecular interactions in the crystal formation. The EnrH2+andH3Cit- molecular ions are packed in alternating layers with water molecules inserted into the citrate layers. A citrate ion in the layer is linked via H-bondings with two adjacent ones and three water molecules. Enrofloxacinium cations are packaged by means of a benched mode and every cation is linked by three intermolecular thymus type H-bondings with nitrogens of adjacent cations and by two links with the oxygen of the citrate ions. The infrared spectra gave the evidence of H-bonding formation in the obtained salt. The ?-stacking interactions are observed between the aromatic cycles of the adjacent cations which are located in an antiparallel style in a layer. В© 2012 Elsevier B.V. All rights reserved.

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Держатели документа:
Siberian Federal University, Svobodny Ave. 79, Krasnoyarsk 660041, Russian Federation
Kirensky Institute of Physics SB RAS, Krasnoyarsk 660036, Russian Federation
Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Vasiliev, A. D.; Васильев, Александр Дмитриевич; Kirik, S. D.; Головнёв, Николай Николаевич
}
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Martynov, S. N.
Incommensurate structures in a two-subsystem partially frustrated ferrimagnet / S. N. Martynov // JETP Letters. - 2012. - Vol. 95, Is. 4. - P. 188-192, DOI 10.1134/S0021364012040066. - Cited References: 23. - This work was supported by the Russian Foundation for Basic Research (project no. 10-02-00765). . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
CLASSICAL-THEORY
   MAGNETIC-FIELD
   ANTIFERROMAGNET
   CUB2O4
   STATE
Аннотация: A new incommensurate magnetic structure with a locally triangular orientation of spins has been proposed for a two-subsystem magnet with frustrated intersystem exchange and competition between exchanges in one of the subsystems. When the temperature is lowered, this structure appears from the antiferromagnetic state after a first-order phase transition. It transfers to the Yafet-Kittel triangular structure when the threshold conditions for the exchange interactions are fulfilled. An increase in the length of the frustrated exchange bonds leads to the appearance of an incommensurate phase with the local antiferromagnetic orientation of the sublattices in each subsystem between the commensurate antiferromagnetic and Yafet-Kittel phases.

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Публикация на русском языке Мартынов, Сергей Николаевич. Несоизмеримые структуры в двухподсистемном частично фрустрированном ферримагнетике [Текст] / С. Н. Мартынов // Письма в Журн. эксперим. и теор. физ. : Санкт-Петербургская издательская фирма "Наука" РАН, 2012. - Т. 95 Вып. 4. - С. 205-209

Доп.точки доступа:
Мартынов, Сергей Николаевич
}
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Val'kov, V. V.
Effects of multiple reflection in the process of inelastic electron transport through an anisotropic magnetic atom / V. V. Val'kov, S. V. Aksenov, E. A. Ulanov // JETP Letters. - 2013. - Vol. 98, Is. 7. - P. 403-409, DOI 10.1134/S0021364013200162. - Cited References: 27. - This work was supported by the Presidium of the Russian Academy of Sciences (program "Quantum Mesoscopic and Disordered Systems"), the Ministry of Education and Science of Russian Federation (state contract no. 16.740.11.0644, federal program "Human Capital for Science and Education in Innovative Russia" for 2009-2013), and the Russian Foundation for Basic Research (project nos. 12-02-31130, 13-02-00523, and 13-02-98013). S. V. A. is grateful to the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools, project nos. MK-526.2013.2 and SP-6361.2013.5. . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
QUANTUM
SPECTROSCOPY
STATE
Аннотация: The effect of multiple reflection in the process of electron transport on the current-voltage characteristics of an adsorbed magnetic atom with single-ion anisotropy has been investigated. All orders of the perturbation theory with respect to the parameter of coupling between the contacts and the multilevel impurity have been taken into account by the Keldysh diagram technique with the use of Hubbard operators. It has been shown that the current-voltage characteristics of the system in a strongly nonequilibrium regime contains regions of negative differential conductance. The ways of enhancing this effect are discussed.

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Публикация на русском языке Эффекты многократного отражения при неупругом электронном транспорте через анизотропный магнитный атом. - [S. l. : s. n.]

Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Aksenov, S. V.; Аксенов, Сергей Владимирович; Ulanov, E. A.; Вальков, Валерий Владимирович; Presidium of the Russian Academy of Sciences; Ministry of Education and Science of Russian Federation [16.740.11.0644]; Russian Foundation for Basic Research [12-02-31130, 13-02-00523, 13-02-98013]; Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools [MK-526.2013.2, SP-6361.2013.5]
}
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Shneyder, E. I.
Contribution of the non-Heisenberg ring exchange to the magnetic mechanism of high-Tc superconductivity / E. I. Shneyder, S. G. Ovchinnikov, A. V. Shnurenko // JETP Letters. - 2012. - Vol. 95, Is. 4. - P. 193-197, DOI 10.1134/S0021364012040078. - Cited References: 44. - This work was supported by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project no. NSh-1044.2012.2), by the Russian Foundation for Basic Research (project no. 12-02-00040), by the Presidium of the Russian Academy of Sciences (program no. 20 "Quantum Mesoscopic and Disordered Systems"), jointly by the Siberian and Ural Branches of the Russian Academy of Sciences, by Siberian Federal University (project no. s/b S-11), and by the Ministry of Education and Science of the Russian Federation (state contract no. P891, federal program "Human Capital"). E.I.Sh. acknowledges the support of the Dynasty Foundation. . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
BAND HUBBARD-MODEL
   COPPER OXIDES
   ELEMENTARY EXCITATIONS
   SPIN
   ELECTRON
   STATE
   T/U
Аннотация: The effect of non-Heisenberg four-spin ring exchange on the superconducting transition temperature in strongly correlated electron systems is studied. It is shown that the ring exchange can significantly suppress the contribution of the Heisenberg exchange to superconducting pairing.

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Публикация на русском языке Шнейдер, Елена Игоревна. Влияние негейзенберговского кольцевого обмена на магнитный механизм высокотемпературной сверхпроводимости [Текст] / Е. И. Шнейдер, С. Г. Овчинников, А. В. Шнуренко // Письма в Журн. эксперим. и теор. физ. : Санкт-Петербургская издательская фирма "Наука" РАН, 2012. - Т. 95 Вып. 3-4. - С. 211-215

Держатели документа:
[Shneyder, E. I.
Ovchinnikov, S. G.
Shnurenko, A. V.] Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Shnurenko, A. V.; Шнуренко, А. В.; Шнейдер, Елена Игоревна
}
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Krinitsyn, A.
Cluster size and shape effect on the electronic structure of the Hubbard model within the norm-conserving cluster perturbation theory / A. Krinitsyn, S. Nikolaev, S. G. Ovchinnikov // J. Supercond. Nov. Magn. - 2014. - Vol. 27, Is. 4. - P. 955-963, DOI 10.1007/s10948-013-2418-7. - Cited References: 59. - This work was supported by Grants NSh-1044.2012.2 and MK-1168.2012.2, Siberian Federal University: Grant F-11, and the Presidium of RAS Program 20.7. . - ISSN 1557-1939. - ISSN 1557-1947

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
NARROW ENERGY-BANDS
   CUPRATE SUPERCONDUCTORS
   PHOTOEMISSION SPECTRA
   PSEUDOGAP
   ANTIFERROMAGNET
   EXCITATIONS
   EVOLUTION
   SYSTEMS
   PHASE
   STATE
Кл.слова (ненормированные):
Cluster perturbation theory -- Hubbard model -- Strong correlations -- Density of states -- Fermi surface
Аннотация: Within a new norm-conserving approach to the cluster perturbation theory (CPT) for the 2d Hubbard model we study the effect of the cluster size and shape on the electronic structure. We have compared two type of clusters, 4-cluster (2x2) and 5-cluster (cruciform of 5 atoms). With 4-cluster we can treat exactly the first and second neighbours correlations, C (1) and C (2). With 5-cluster the third neighbour correlations C (3) are also treated exactly. The band structure in the CPT with 4- and 5-clusters differs remarkably. The quasiparticle spectral weight map for 5-clusters is very similar to the Quantum Monte Carlo (QMC) and the variational CPT data. With increasing doping, small hole Fermi surface transforms into conventional Fermi-liquid type large Fermi surface through Lifshitz quantum phase transitions.

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Держатели документа:
Dostoyevsky Omsk State Univ, Omsk 644077, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Nikolaev, S.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Siberian Federal University [F-11]; Presidium of RAS Program [20.7]; [NSh-1044.2012.2]; [MK-1168.2012.2]
}
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Structural, spectroscopic, and thermophysical investigations of the oxyfluorides CsZnMoO3F3 and CsMnMoO3F3 with the pyrochlore structure / Y. V. Gerasimova [et al.] // Phys. Solid State. - 2014. - Vol. 56, Is. 3. - P. 599-605, DOI 10.1134/S1063783414030135. - Cited References: 26. - This study was supported by the Russian Foundation for Basic Research (project no. 12-02-31205_mol_a), the Ministry of Education and Science of the Russian Federation within the framework of the Federal Target Program "Scientific and Scientific-Pedagogical Human Resources for the Innovative Russia" (agreement no. 8379), and the Siberian Branch of the Russian Academy of Sciences (Interdisciplinary Integration Project no. 28). . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
PHASE-TRANSITIONS
   CRYSTAL-STRUCTURE
   STATE
   Cs
   Mo
Аннотация: The structure, infrared and Raman spectra, heat capacity, and thermal expansion have been investigated. It has been shown that, down to liquid-helium temperatures, the cubic pyrochlore structure of the CsMnMoO3F3 and CsZnMoO3F3 oxyfluorides remains stable. The influence of cation substitution on individual features of the properties of the oxyfluorides has been analyzed.

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Публикация на русском языке Структурные, спектроскопические и теплофизические исследования оксифторидов CsZnMoO3F3 и CsMnMoO3F3 со структурой пирохлора [Текст] / Ю. В. Герасимова [и др.] // Физ. тверд. тела : ФТИ РАН, 2014. - Т. 56 Вып. 3. - С. 577-582

Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Russian Acad Sci, Sobolev Inst Geol & Mineral, Siberian Branch, Novosibirsk 630090, Russia
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660074, Russia

Доп.точки доступа:
Gerasimova, Y. V.; Герасимова, Юлия Валентиновна; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Ivanenko, A. A.; Иваненко, Александр Анатольевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Isaenko, L. I.; Flerov, I. N.; Флёров, Игорь Николаевич; Bogdanov, E. V.; Богданов, Евгений Витальевич; Gorev, M. V.; Горев, Михаил Васильевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Krylov, A. S.; Крылов, Александр Сергеевич; Russian Foundation for Basic Research [12-02-31205_mol_a]; Ministry of Education and Science of the Russian Federation [8379]; Siberian Branch of the Russian Academy of Sciences [28]
}
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10.

Electron transport in FeBO3 ferroborate at ultrahigh pressures / I. A. Troyan [et al.] // JETP Letters. - 2012. - Vol. 94, Is. 10. - P. 748-752, DOI 10.1134/S0021364011220115. - Cited References: 22. - This work was supported by the Russian Foundation for Basic Research (project nos. 09-02-01527-a, 09-02-00127-a, 09-02-00171-a, 11-02-00291-a, and 11-02-00636-a), by the Ministry of Education and Science of the Russian Federation (state contract nos. 16.518.11.7021 and MK-5632.2010.2), and by the Division of Physical Sciences, Russian Academy of Sciences (program "Strong Electron Correlations"). . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
MAGNETIC COLLAPSE
TRANSITION
STATE
Аннотация: The electrical resistance of FeBO3 crystals at high and ultrahigh pressures (up to 198 GPa) and low temperatures has been measured using diamond anvil cells. It has found that in the high-pressure phase, 46 GPa ‹ P‹ 100 GPa, the activation energy E-ac decreases gradually from 0.55 to 0.3 eV according to a linear law. Its extrapolation to zero gives an estimated value of about 210 GPa for the pressure at which complete metallization is expected. However, above 100 GPa, the linear E-ac(P) dependence smoothly transforms to a nonlinear one. At the same time, the temperature dependence of the electrical resistance at fixed pressure significantly deviates from the Arrhenius activation law and does not obey the Mott law for the hopping conductivity. Experimental data demonstrate the dependence of the activation energy E-ac both on pressure and temperature. At T = 0, the gap tends to zero. Theoretical analysis shows that the decrease in E-ac upon cooling can be interpreted in terms of the transition of the low-spin FeBO3 phase to the magnetically ordered (anti-ferromagnetic) state.

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Публикация на русском языке Транспортные свойства ферро-бората FeBO3 при сверхвысоких давлениях [Текст] / И. А. Троян [и др.] // Письма в Журн. эксперим. и теор. физ. : Наука, 2011. - Т. 94 Вып. 10. - С. 811-815

Держатели документа:
[Troyan, I. A.
Gavrilyuk, A. G.
Lyubutin, I. S.] Russian Acad Sci, Shubnikov Inst Crystallog, Moscow 119333, Russia
[Troyan, I. A.] Max Planck Inst Chem, D-55020 Mainz, Germany
[Gavrilyuk, A. G.] Russian Acad Sci, Inst Nucl Res, Troitsk 142190, Moscow Region, Russia
[Ovchinnikov, S. G.
Kazak, N. V.] Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Troyan, I. A.; Gavrilyuk, A. G.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Lyubutin, I. S.; Kazak, N. V.; Казак, Наталья Валерьевна
}
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11.

Val'kov, V. V.
Inelastic tunnel transport of electrons through an anisotropic magnetic structure in an external magnetic field / V. V. Val'kov, S. V. Aksenov, E. A. Ulanov // J. Exp. Theor. Phys. - 2014. - Vol. 119, Is. 1. - P. 124-137, DOI 10.1134/S1063776114060065. - Cited References: 35. - This work was performed under the Program "Quantum Mesoscopic and Disordered Systems" of the Presidium of the Russian Academy of Sciences and supported financially by the Russian Foundation for Basic Research (project nos. 13-02-00523, 13-02-98013, and 14-02-31280). The work of one of coauthors (S. V. A.) was supported by grant no. MK-526-526.2013.2 of the President of the Russian Federation and scholarship SP-6361.2013.5 of the President of the Russian Federation. . - ISSN 1063-7761. - ISSN 1090-6509

РУБ Physics, Multidisciplinary
Рубрики:
SINGLE-MOLECULE
   SPECTROSCOPY
   ATOM
   STATE
Аннотация: Quantum transport of electrons through a magnetic impurity located in an external magnetic field and affected by a substrate is considered using the Keldysh diagram technique for the Fermi and Hubbard operators. It is shown that in a strongly nonequilibrium state induced by multiple reflections of electrons from the impurity, the current-voltage (I-V) characteristic of the system contains segments with a negative conductivity. This effect can be controlled by varying the anisotropy parameter of the impurity center as well as the parameters of coupling between the magnetic impurity and metal contacts. The application of the magnetic field is accompanied by an increase in the number of Coulomb steps in the I-V curve of the impurity. The effect of appreciable magnetoresistance appears in this case. We demonstrate the possibility of switching between magnetic impurity states with different total spin projection values in the regime of asymmetric coupling of this impurity with the contacts.

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Переводная версия Вальков, Валерий Владимирович. Неупругий туннельный транспорт электронов через анизотропную магнитную структуру во внешнем магнитном поле [Текст] / В. В. Вальков, С. В. Аксенов, Е. А. Уланов // Журн. эксперим. и теор. физ. : Наука, 2014. - Т. 146 Вып. 1. - С. 144-159

Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Aksenov, S. V.; Аксенов, Сергей Владимирович; Ulanov, E. A.; Уланов Е. А.; Вальков, Валерий Владимирович; Russian Foundation for Basic Research [13-02-00523, 13-02-98013, 14-02-31280]; Russian Federation [MK-526-526.2013.2, SP-6361.2013.5]
}
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12.

Fedoseev, A. D.
Partial differential cross section of inelastic magnetic neutron scattering in the paramagnetic phase of LaCoO3 / A. D. Fedoseev // J. Exp. Theor. Phys. - 2014. - Vol. 119, Is. 3. - P. 573-578, DOI 10.1134/S1063776114090027. - Cited References: 18. - This study was supported by the Russian Foundation for Basic Research (project nos. 13-02-00523 A, 14-02-31280 mol_a, and 13-02-98013). . - ISSN 1063-7761. - ISSN 1090-6509

РУБ Physics, Multidisciplinary
Рубрики:
FEATURES
STATE
Аннотация: The partial differential cross section of inelastic magnetic neutron scattering from the compound LaCoO3 in the paramagnetic phase is studied theoretically. The contribution to scattering from the high-spin state of an ion in zero magnetic field and the modification of this contribution upon application of a magnetic field are calculated using the effective Hamiltonian for the 5 D term. The amplitude of the peak in the dependence of the scattering cross section on the energy of scattered neutrons, which corresponds to the transition from the low-spin to the intermediate-spin state, is estimated.

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Публикация на русском языке Федосеев, Александр Дмитриевич. Дважды дифференциальное сечение неупругого магнитного рассеяния нейтронов в парамагнитной фазе LaCoO3 [Текст] / А. Д. Федосеев // Журн. эксперим. и теор. физ. : Наука, 2014. - Т. 146 Вып. 3. - С. 651-656

Доп.точки доступа:
Федосеев, Александр Дмитриевич; Russian Foundation for Basic Research [13-02-00523 A, 14-02-31280 mol_a, 13-02-98013]
}
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13.

Pressure-induced spin transition and evolution of the electronic excitations of FeBO3: Resonant inelastic x-ray scattering results / J. Kim [et al.] // Europhys. Lett. - 2014. - Vol. 108, Is. 3. - Ст. 37001, DOI 10.1209/0295-5075/108/37001. - Cited References: 47. - High-pressure work was supported by DOE under Contract No. DE-FG02-02ER45955. The use of the Advanced Photon Source at the Argonne National Laboratory was supported by the U.S. DOE under Contract No. DE-AC02-06CH11357. SGO and YuO acknowledge the President of Russia Grants NSh-1044.2012.2 and MK-1168.2012.2, the Presidium of the Russian Academy of Sciences Program 2, RFFI Grants 12-02-90410 and 12-02-31543, FCP GK-P891, and the Siberian Federal University Grant F11. AGG acknowledges support from the Russian Foundation for Basic Research grants 14-02-00483 and 15-02-03770 from RAS programs "Strongly correlated electron systems", "Elementary particle physics, fundamental nuclear physics and nuclear technologies". . - ISSN 0295-5075. - ISSN 1286-4854

РУБ Physics, Multidisciplinary
Рубрики:
LOWER-MANTLE
   SPECTRA
   STATE
   EMISSION
   COLLAPSE
   SYSTEMS
   OXIDES
   METAL
Аннотация: A high-pressure resonant inelastic x-ray scattering (RIXS) of FeBO3 at the Fe K pre-edge has been carried out to study the evolution of electronic excitations through the pressure-induced spin transition. Systematic peak shifts with insignificant peak width change are observed with increasing pressure in the high-spin state. An electronic transition occurs in tandem with the high-spin to low-spin transition, observed as the emergence of multiple new low-energy peaks in the spectra. The energy gap is reduced due to these low-energy peaks, not a peak width broadening. The observed electronic excitations are associated with dd excitations, which are calculated using a full-multiplet theory. We consider changes in crystal-field splitting and covalency to explain the observed peak shifts in the high-spin state. The new peaks that emerge upon the high- to low-spin transition are compared with dd excitations for the low-spin configuration. Copyright (C) EPLA, 2014

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Держатели документа:
Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci Troitsk, Inst Nucl Res, Moscow 142190, Russia
Russian Acad Sci, Inst Crystallog, Moscow 119333, Russia
Carnegie Inst Sci, HPCAT, Argonne, IL 60439 USA

Доп.точки доступа:
Kim, J.; Struzhkin, V. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Shvyd'ko, Y.; Upton, M. H.; Casa, D.; Gavriliuk, A. G.; Sinogeikin, S. V.; DOE [DE-FG02-02ER45955]; U.S. DOE [DE-AC02-06CH11357]; President of Russia Grants [NSh-1044.2012.2, MK-1168.2012.2]; Presidium of the Russian Academy of Sciences Program 2, RFFI [12-02-90410, 12-02-31543]; Siberian Federal University Grant [F11]; Russian Foundation for Basic Research grants from RAS programs [14-0200483, 15-02-03770]; FCP [GK-P891]
}
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14.

Aver'yanov, E. M.
Structural and thermodynamic consequencies of the interaction of conformational degrees of freedom of azomethines in the nematic phase / E. M. Aver'yanov // J. Struct. Chem. - 2014. - Vol. 55, Is. 4. - P. 605-611, DOI 10.1134/S0022476614040039. - Cited References: 21 . - ISSN 0022-4766. - ISSN 1573-8779

РУБ Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
CONJUGATED POLY(AZOMETHINE)S
   TERMINAL SUBSTITUENTS
   ELECTRONIC-STRUCTURES
   FLUORINATED ANALOGS
   INTERNAL-ROTATION
   MOLECULES
   COMPOUND
   ANGLES
   STATE
   NMR
Кл.слова (ненормированные):
azomethines -- benzylideneaniline -- conformation -- steric effects of substituents -- nematic-isotropic liquid transition -- conformational polymorphism
Аннотация: The interaction of the conformational degrees of freedom of azomethines in the nematic phase, which is induced by electronic donor-acceptor properties of the terminal substituents of the benzylideneaniline core is studied. These degrees of freedom related to the rotation angles phi (k) around the bonds between the substituent and the aniline ring (phi(1)) and also between the CH=N bridge and the aniline ring (omega(2)) are characterized by the parameters Q (k) = aOE (c) cos(2)phi (k) >. It is found that the interaction of these degrees of freedom is manifested in the linear dependence Q (2)(Q (1)). Within the phenomenological theory the effect of this interaction on changes delta (k) in the Q (k) values during the nematic liquid crystal-isotropic liquid phase transition is revealed along with the temperature T (NI) and character of this transition. The derivation of previously established empirical dependences T (NI)(Q (k) ) is presented in the presence of direct and indirect steric effects of side substituents affecting the Q (k) values. A diverse combination of delta (k) signs in the nematic phase, which is a prerequisite for the conformational polymorphism of the nematic phases of azomethines, is shown.

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Публикация на русском языке Аверьянов, Евгений Михайлович. Структурные и термодинамические следствия взаимодействия конформационных степеней свободы азометинов [Текст] / Е. М. Аверьянов // Журн. структ. химии. - Новосибирск : Изд-во СО РАН, 2014. - Т. 55 № 4. - С. 641 - 647

Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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15.

Unbiased crystal structure prediction of NiSi under high pressure / P. N. Gavryushkin [et al.] // J. Appl. Crystallogr. - 2015. - Vol. 48, No. 3. - P. 906-908, DOI 10.1107/S1600576715005488. - Cited References:29. - We thank the Information Technology Centre of Novosibirsk State University for providing access to the cluster computational resources. The research was financially supported by the Russian Science Foundation (grant No. 14-17-00601) and performed under the program of the Ministry of Education and Science of Russia (project No. 14.B25.31.0032). The work of ZIP is supported by the Leading Science School program (No. NS-2886.2014.2). . - ISSN 0021. - ISSN 1600-5767. -

РУБ Crystallography
Рубрики:
AUGMENTED-WAVE METHOD
   PHASE-TRANSITIONS
   STABILITY
   EQUATIONS
   STATE
Кл.слова (ненормированные):
Earth's core -- pressure -- ab initio calculations -- FeSi -- NiSi -- CoSi -- MnSi -- isomorphism
Аннотация: On the basis of an unbiased structure prediction, it is shown that the stable form of NiSi under pressures of 100 and 200 GPa is the Pmmn structure. Furthermore, a new stable phase has been discovered: the deformed tetragonal CsCl-type structure with a = 2.174 Å and c = 2.69 Å at 400 GPa. Specifically, the sequence of high-pressure phase transitions is the following: the Pmmn structure below 213 GPa, the tetragonal CsCl type in the range 213–522 GPa, and cubic CsCl higher than 522 GPa. As the CsCl-type structure is considered as the model structure of the FeSi compound at the conditions of the Earth's core, this result implies restrictions on the Fe–Ni isomorphic miscibility in FeSi.

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Держатели документа:
Russian Acad Sci, VS Sobolev Inst Geol & Mineral, Siberian Branch, Moscow 117901, Russia
Novosibirsk State Univ, Novosibirsk 630090, Russia
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
Univ Auckland, Dept Comp Sci, Auckland 1, New Zealand

Доп.точки доступа:
Gavryushkin, P. N.; Popov, Z. I.; Попов, Захар Иванович; Litasov, K. D.; Gavryushkin, A.
}
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16.

Martynov, S. N.
Flat and conical incommensurate magnetic structures in the two-subsystem partially frustrated Heisenberg ferrimagnet / S. N. Martynov // J. Magn. Magn. Mater. - 2016. - Vol. 398. - P. 121-126, DOI 10.1016/j.jmmm.2015.09.046. - Cited References: 21 . - ISSN 0304-8853

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
Spin-wave spectrum
   Phase 10 K
   Copper metaborate
   Classical-theory
   State
Кл.слова (ненормированные):
Incommensurate magnetic structures -- Phase transitions -- Ferrimagnets
Аннотация: The phase transitions into flat and conical incommensurate magnetic structures are considered for a ferrimagnet with the dominant nonfrustrated exchange between the spins in one crystallographic position, competing exchanges between the spins in another position and frustrated exchange between the spins in different positions. The appearance conditions and the temperatures of the second order phase transitions are analytically obtained in the mean field approximation. The first order phase transition between these states is studied and the phase diagrams of temperature vs frustrated exchanges are calculated by the numerical minimization of free energy.

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Доп.точки доступа:
Мартынов, Сергей Николаевич
}
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17.

High rotatable magnetic anisotropy in epitaxial L10CoPt(111) thin films / V. G. Myagkov [et al.] // JETP Letters. - 2015. - Vol. 102, Is. 6. - P. 355-360, DOI 10.1134/S0021364015180101. - Cited References: 51. - A We are grateful to L.A. Solov'ev for the help in X-ray studies of the epitaxial orientation of phases in L10CoPt(111) samples. This work was supported by the Russian Foundation for Basic Research (project no. 15-02-00948), in part by the Council the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project no. SP-317.2015.1), and by the Foundation for the Assistance of the Development of Small Innovative Scientific and Engineering Enterprises (UMNIK). . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
Co-Pt ALLOYS
   ROOM-TEMPERATURE
   COERCIVITY
   ORIGIN
   ORDER
   STATE
Аннотация: The evolution of the structural and magnetic properties in epitaxial film systems Co/Pt(111) of equiatomic composition during vacuum annealing has been presented. Annealing to the temperature of 400°C does not lead to the variation of the structural and magnetic properties of the films, which indicates the absence of considerable mixing of the Co/Pt interface. With the increase in the annealing temperature from 400 to 750°C, nanoclusters containing the main magnetically hard L10CoPt(111) phase epitaxially intergrown with the CoPt3 phase are formed. High rotatable magnetic anisotropy has been found in the prepared films. In magnetic fields above the coercive force (H > HC = 8 kOe), the easy anisotropy axis with the angle of lag taken into account can be oriented in any spatial direction. Possible mechanisms of the formation of the rotatable magnetic anisotropy have been discussed. It has been assumed that the high rotatable magnetic anisotropy makes the main contribution to the magnetic perpendicular anisotropy in CoxPt1–x films. © 2015, Pleiades Publishing, Inc.

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Публикация на русском языке Большая магнитная вращающаяся анизотропия в эпитаксиальных L10CoPt(111) тонких пленках [Текст] / В. Г. Мягков [и др.] // Письма в ЖЭТФ : Наука, 2015. - Т. 102 Вып. 5-6. - С. 393-398

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace Krasnoyarsk, Krasnoyarsk, Russian Federation
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Myagkov, V. G.; Мягков, Виктор Григорьевич; Zhigalov, V. S.; Жигалов, Виктор Степанович; Bykova, L. E.; Быкова, Людмила Евгеньевна; Bondarenko, G. N.; Бондаренко, Галина Николаевна; Rybakova, A. N.; Рыбакова, Александра Николаевна; Matsynin, A. A.; Мацынин, Алексей Александрович; Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
}
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18.

    The mechanism of the area negative thermal expansion in KBe2BO3F2 family crystals: A first-principles study / X. Jiang [et al.] // J. Appl. Phys. - 2016. - Vol. 119, Is. 5. - Ст. 055901, DOI 10.1063/1.4941266. - Cited References: 56. - This work was supported by the National Scientific Foundations of China (Grant No. 11474292), the Special Foundation of the Director of Technical Institute of Physics and Chemistry (TIPC), and the Opening Project of the Key Laboratory of Cryogenics in TIPC, Chinese Academy of Sciences, China “863” Project (No. 2015AA034203) and “973” Project (No. 2014CB921301). . - ISSN 0021-8979
   Перевод заглавия: Механизм отрицательного теплового расширения площади в семействе кристаллов KBe2BO3F2: первопринципный расчет

РУБ Physics, Applied
Рубрики:
PSEUDOPOTENTIALSSTATE
   COMPRESSIBILITY
   TETRAHEDRA
   RANGE
   STATE
Аннотация: A very recent study demonstrated that the KBe2BO3F2 (KBBF) family of crystals, including KBBF, RbBe2BO3F2, and CsBe2BO3F2, are the only known borates exhibiting a rarely occurring isotropic area negative thermal expansion (NTE) behavior, over a very large temperature range. In the present work, the NTE mechanism in these crystals is comprehensively investigated using the first-principles calculations. It is revealed that the area NTE behavior mainly originates from the concerted distortion of [BeO3F] tetrahedra in the two-dimensional [Be2BO3F2] framework with respect to temperature, while the [BO3] triangles remain almost rigid. Moreover, the different magnitude of NTE effect in the three crystals is attributed to the interaction difference between the alkali metal atoms (K, Rb, or Cs) and the [Be2BO3F2] layer. © 2016 AIP Publishing LLC.

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Держатели документа:
Center for Crystal Research and Development, Key Lab of Functional Crystals and Laser Technology of Chinese Academy of Sciences, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China
University of Chinese Academy of Sciences, Beijing, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, China
Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, China

Доп.точки доступа:
Jiang, X.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Li, W.; Wu, S.; Lin, Z.; Wu, Y.; Chen, C.
}
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19.

Size dependent magnetic and magneto-optical properties of Ni0.2Zn0.8Fe2O4 nanoparticles / O. A. Li [et al.] // J. Magn. Magn. Mater. - 2016. - Vol. 408. - P. 206-212, DOI 10.1016/j.jmmm.2016.02.062. - Cited References: 51. - This work is supported by the Ministry of Science and Technology of Taiwan (MOST 103-2811-M-153 -001 and MOST 102-2112-M-153 -002 -MY3), and by the Russian Foundation for Basic Researches, grant No 14-02-01211. . - ISSN 0304-8853

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
Zinc ferrite
   Cation distribution
   Sol-gel
   Ni
   ZnFe2O4
   Spinel
   Fe3O4
   Particles
   Spectra
   State
Кл.слова (ненормированные):
Nickel zinc ferrite -- Nanoparticles -- Magnetic properties -- MCD
Аннотация: Ni0.2Zn0.8Fe2O4 spinel nanoparticles have been synthesized by combustion method. Average particles size varies from 15.5 to 50.0 nm depending on annealing temperature. Correlations between particles size and magnetic and magneto-optical properties are investigated. Magnetization dependences on temperature and external magnetic field correspond to the sum of paramagnetic and superparamagnetic response. Critical size of single-domain transition is found to be 15.9 nm. Magnetic circular dichroism (MCD) studies of nickel zinc spinel are presented here for the first time. The features in magnetic circular dichroism spectrum are assigned to the one-ion d-d transitions in Fe3+ and Ni2+ ions, as well to the intersublattice and intervalence charge transfer transitions. The MCD spectrum rearrangement was revealed with the change of the nanoparticles size. © 2016 Elsevier B.V. All rights reserved.

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Держатели документа:
Department of Applied Physics, National Pingtung University, Pingtung, Taiwan
Siberian Federal University, Krasnoyarsk, Russian Federation
Department of Applied Chemistry, National Pingtung University, Pingtung, Taiwan
L.V. Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Li, O. A.; Lin, C. -R.; Chen, H. -Y.; Hsu, Hua-Shu; Shih, K. -Y.; Edelman, I. S.; Эдельман, Ирина Самсоновна; Wu, K. -W.; Tseng, Y. -T.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Lee, J. -S.
}
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20.

    Crystal structure and luminescence properties of green-emitting Sr1−xAl12O19:xEu2+ phosphors / B. Ma [et al.] // Ceram. Int. - 2016. - Vol. 42, Is. 5. - P. 5995-5999, DOI 10.1016/j.ceramint.2015.12.149. - Cited References: 30. - This work was supported by the National Natural Science Foundation of China (Grant nos. 51032007 and 51372232) and the Fundamental Research Funds for the Central Universities (Grant no. 2652015024). . - ISSN 0272-8842. - ISSN 1873-3956
   Перевод заглавия: Кристаллическая структура и люминесцентные свойства зеленого люминофора Sr1-xAl12O19:xEu2+

РУБ Materials Science, Ceramics
Рубрики:
COLOR-TUNABLE PHOSPHOR
   ENERGY-TRANSFER
   Dy3+ PHOSPHORS
   NEAR-UV
   Eu2+
   DIODES
   PHASE
   STATE
   Ce3+
Кл.слова (ненормированные):
Crystal structure -- Magnetoplumbite -- Phosphor
Аннотация: In this paper, a series of novel luminescent Sr1−xAl12O19:xEu2+ phosphors were synthesized by a high temperature solid-state reaction. The phase structure, photoluminescence (PL) properties, as well as the decay curves were investigated. The quenching concentration of Eu2+ in SrAl12O19 was about 0.15 (mol). Upon excitation at 378 nm, the composition-optimized Sr0.85Al12O19:0.15Eu2+ exhibited strong broad-band green emission at 530 nm with the CIE chromaticity (0.2917, 0.5736). The results indicate that Sr1−xAl12O19:xEu2+ phosphors have potential applications as green-emitting phosphors for UV-pumped white-light LEDs.

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Держатели документа:
China Univ Geosci, Sch Mat Sci & Technol, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Natl Lab Mineral Mat, Beijing 100083, Peoples R China.
SB RAS, Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.

Доп.точки доступа:
Ma, Bin; Guo, Q. F.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lv, Zhenfei; Yao, Jun; Mei, Lefu; Huang, Zhaohui
}
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