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Kolovsky, A. R.
Wannier-Stark states and topological phase transitions in tilted two-dimensional bipartite lattices / A. R. Kolovsky // Humboldt Kolleg. Controlling quantum matter: From ultracold atoms to solids : conference materials. - 2018

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Доп.точки доступа:
Коловский, Андрей Радиевич; Controlling quantum matter: From ultracold atoms to solids, Humboldt Kolleg(2018 ; July 29 - August 2 ; Vilnius, Lithuania)Vilnius University; Lithuanian Physical Society
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    Vorotynov, A. M.
    Uniaxial and basal plane anisotropy caused by Cr2+ impurity ions in CrBO3 crystals / A. M. Vorotynov, S. G. Ovchinnikov, V. V. Rudenko // J. Phys. Chem. Solids. - 2018. - Vol. 123. - P. 389-392, DOI 10.1016/j.jpcs.2018.08.016. - Cited References: 14 . - ISSN 0022-3697
   Перевод заглавия: Одноосная и базисная анизотропия вызванная примесью ионов Cr2+ в кристаллах CrBO3
Кл.слова (ненормированные):
Anisotropy -- Chromium compounds -- Crystal impurities -- Ions -- Single crystals
Аннотация: IIn this study, the uniaxial and basal anisotropy governed by Cr2+ impurity ions was treated based on the Cr2+– BO3 3− ion vacancy model using single ion approximation. The anomalous behavior of the basal anisotropy at low temperatures was predicted.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Russian Federation

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Rudenko, V. V.; Руденко, Валерий Васильевич; Воротынов, Александр Михайлович
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    Tuning of photoluminescence and local structures of substituted cations in xSr2Ca(PO4)2-(1 - x)Ca10Li(PO4)7:Eu2+ phosphors / M. Chen [et al.] // Chem. Mater. - 2017. - Vol. 29, Is. 3. - P. 1430-1438, DOI 10.1021/acs.chemmater.7b00006. - Cited References: 37. - The present work was supported by the National Natural Science Foundation of China (Grants 91622125 and 51572023), Natural Science Foundations of Beijing (2172036), and Fundamental Research Funds for the Central Universities (FRF-TP-15-003A2). . - ISSN 0897-4756
   Перевод заглавия: Управляемая люминесценция и локальная структура замещаемых катионов в люминофоре xSr2Ca(PO4)2-(1-x)Ca10Li(PO4)7:Eu2+
Кл.слова (ненормированные):
Calcium -- Energy transfer -- Europium -- Light emission -- Lithium -- Luminescence -- Phosphors -- Photoionization -- Photoluminescence -- Single crystals -- Composition ranges -- Crystal-field splitting -- Luminescence measurements -- Non-linear variation -- Photoionization process -- Polyhedra distortion -- Rare earth doped solids -- Temperature dependent -- Solid solutions
Аннотация: Local structure modification in solid solution is an essential part of photoluminescence tuning of rare earth doped solid state phosphors. Herein we report a new solid solution phosphor of Eu2+-doped xSr2Ca(PO4)2-(1 - x)Ca10Li(PO4)7 (0 ≤ x ≤ 1), which share the same β-Ca3(PO4)2 type structure in the full composition range. Depending on the x parameter variation in xSr2Ca(PO4)2-(1 - x)Ca10Li(PO4)7:Eu2+, the vacancies generated in the M(4) site enable the nonlinear variation of cell parameters and volume, and this increases the magnitude of M(4)O6 polyhedra distortion. The local structure modulation around the Eu2+ ions causes different luminescent behaviors of the two-peak emission and induces the photoluminescence tuning. The shift of the emission peaks in the solid solution phosphors with different compositions has been discussed. It remains invariable at x ≤ 0.5, but the red-shift is observed at x > 0.5 which is attributed to combined effect of the crystal field splitting, Stokes shift, and energy transfer between Eu2+ ions. The temperature-dependent luminescence measurements are also performed, and it is shown that the photoionization process is responsible for the quenching effect.

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Держатели документа:
Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
State Key Laboratory of Tribology, Tsinghua University, Beijing, China

Доп.точки доступа:
Chen, M.; Xia, Z.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Wang, T.; Liu, Q.
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Kveglis, L. I.
The self-organization of tetrahedrally close-packed structures in magnetic nanocrystalline Tb-Fe and Co-Pd films / L. I. Kveglis, A. V. Kuzovnikov, I. V. Timofeev ; ed.: BM Darinskii, , BM Darinsk // Mechanical spectroscopy III: Mechanical spectroscopy and relaxation phenomena IN SOLIDS. Ser. Solid state phenomena : Trans tech publications LTD, 2006. - Vol. 115. - P. 267-273. - Cited References: 19 . - ISBN 1012-0394. - ISBN 3-908451-24-8

РУБ Materials Science, Multidisciplinary + Physics, Applied + Physics, Condensed Matter + Spectroscopy
Рубрики:
AMORPHOUS FILMS
Кл.слова (ненормированные):
dissipative structures -- explosive crystallization -- thermal conductivity -- Tb-Fe films -- Co-Pd films
Аннотация: The self-organization of an atomic structure in Tb30Fe70 and Co50Pd50 films possessing of high values of the perpendicular magnetic anisotropy (PMA) constant (K perpendicular to similar to 10(6) erg/cm(3)) is investigated by transmission electron microscopy. The crystallization of the films is realized in an explosive way with formation of different dissipative structures from the initial nanocrystalline state. In present work the structural model of a thin film in mezzo-scale and the correlation of a structure with magnetic properties are discussed.

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Доп.точки доступа:
Kuzovnikov, A. V.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Darinskii, B. M. \ed.\; International Conference on Mechanical Spectroscopy and Relaxation Phenomena in Solids (3 ; 2006 ; Cracow, Poland)
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The role of strong electron correlations in determination of band structure and charge distribution of transition metal dihalide monolayers / E. A. Kovaleva [et al.] // J. Phys. Chem. Solids. - 2019. - Vol. 134. - P. 324-332, DOI 10.1016/j.jpcs.2019.05.036. - Cited References: 44. - This work was supported by the government contract of the Ministry of Education and Science of the Russian Federation, Russia to Siberian Federal University (Grant No. 16.1455.2017/PCh ) and Russian Foundation for Basic Research (RFBR), Russia (Grant No. 16-32-60003 mol_a_dk), Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project: “Quantum chemical modeling of Bychkov-Rashba interfaces based on transition metal compounds and nanoscaled organic fragments” (Project No. 18-43-243011). The authors would like to thank Joint Supercomputer Center of RAS , Moscow; Center of Equipment for Joint Use of Siberian Federal University , Krasnoyarsk; and Information Technology Center, Novosibirsk State University for providing the access to their supercomputers. N.S.M. acknowledges the financial support of the RFBR , through the research project No. 16-32-60003 mol_a_dk. E.A. Kovaleva is grateful to the Foundation for Assistance to Small Innovative Enterprises (FASIE), Russia (Project no. 0033639 ). W.B. and P.A. gratefully acknowledge the financial support of National Research Foundation of Republic of Korea under the Grant No. NRF-2017R1A2B4004440. . - ISSN 0022-3697
Кл.слова (ненормированные):
Transition metal dihalides -- Monolayers -- DFT -- Hubbard correction -- Band structure
Аннотация: Electronic structure and magnetic properties of the family of first-row transition metal dihalides (TMHal2, TM = V, Cr, Mn, Fe, Co, Ni; H = Br, I) monolayers were studied by means of density functional theory. Strong electron correlations were taken into account by implementing Hubbard U correction in a simplified scheme proposed by Dudarev et al. (Ueff). Ueff correction essentially affects electronic structure of TMHal2 widening the band gap and witnessing their highly spin-polarized nature. Two different ligand orientations namely, H and T configurations of monolayers were considered. Unlike others, FeHal2 monolayers tend to form H structure when Ueff correction is included. © 2019 Elsevier Ltd

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Держатели документа:
Siberian Federal University, 79 Svobodny Pr., Krasnoyarsk, 660041, Russian Federation
Kyungpook National University, 80 Daehakro, Bukgu, Daegu, 41566, South Korea
Kirensky Institute of Physics, FRC KSC SB RAS, 50 Academgorodok, Krasnoyarsk660036, Russian Federation
Tomsk State University, 36 Lenin Prospekt, Tomsk, 634050, Russian Federation

Доп.точки доступа:
Kovaleva, E. A.; Melchakova, I.; Mikhaleva, N. S.; Tomilin, F. N.; Томилин, Феликс Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Baek, W.; Pomogaev, V. A.; Avramov, P. V.; Аврамов, Павел Вениаминович; Kuzubov, A. A.
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The p-T phase diagram of ammonium hexafluoroaluminate / M. V. Gorev [et al.] // J. Phys.: Condens. Matter. - 2002. - Vol. 14, Is. 25. - P. 6447-6453, DOI 10.1088/0953-8984/14/25/312. - Cited References: 17 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
NUCLEAR MAGNETIC-RESONANCE
   TRANSITIONS
   MOTIONS
   F-19
   H-1
Кл.слова (ненормированные):
Entropy -- Hydrostatic pressing -- Mathematical models -- Order disorder transitions -- Phase diagrams -- Specific heat of solids -- Ammonium hexafluoroaluminate -- Crolite -- Elpasolite -- Ammonium compounds
Аннотация: The heat capacity and the effect of hydrostatic pressure on structural phase transitions in ammonium hexafluoroaluminate, (NH4)(3)AlF6, have been studied. Two heat capacity anomalies have been found with maxima at T-1 = 218.5 +/- 0.5 K and T-2 = 179 +/- 2 K. Respective entropy changes of phase transitions are DeltaS(1) = 15.3 +/- 0.5 J mol(-1) K-1 and DeltaS(2) = 2.5 +/- 0.5 J mol(-1) K-1. It is shown that the p-T phase diagram of this compound is rather complex and contains a triple point (p(tp) = 0.12 GPa, T-tp = 221 K) and high-pressure phase. The mechanism of transformations and generalized p-T phase diagram for compounds of the (NH4)(3)(MF6)-F-III family are discussed within the framework of the rotational order-disorder model.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Inst Chim Mat Condensee Bordeaux, F-33608 Pessac, France
ИФ СО РАН
L. V. Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation
Institut de Chimie de la Matiere Condensee de Bordeaux, 33608 Pessac, France

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Tressaud, A.; Durand, E.
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The effect of copper and iron adsorption on the catalytic performance of alumina nanofiber / nanodiamond composite in sensing applications / N. O. Ronzhin, E. D. Posokhina, E. V. Mikhlina [et al.] // J. Phys. Chem. Solids. - 2022. - Vol. 167. - Ст. 110785, DOI 10.1016/j.jpcs.2022.110785. - Cited References: 68. - This work is supported by the Russian Foundation for Basic Research, Project 18–29–19078. The authors would like to express their special thanks to Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS» for providing the equipment to ensure the accomplishment of this project . - ISSN 0022-3697
Кл.слова (ненормированные):
Nanodiamonds -- Alumina nanofibers -- Indicator system -- Copper ions -- Iron ions -- Phenol detection
Аннотация: Phenolic compounds are common environmental pollutants, which are used in many industries and contaminate water environment due to industrial wastewater discharge. Presently, there is an increasing demand for the development and improvement of inexpensive, easy-to-use analytical tools for in-situ detection of phenolic compounds. In this work, we investigate the effect of adsorption of Cu2+ and Fe2+ ions on the catalytic activity of a composite material based on alumina nanofibers (ANF) and detonation nanodiamonds (DND) in the co-oxidation of phenols with 4-aminoantipyrine in the presence of hydrogen peroxide. We have found more than two-fold increase of the catalytic activity for ANF + DND + Cu composite, while the activity of ANF + DND + Fe composite is found to decrease by several times in comparison with the original ANF + DND material. The results of FTIR analysis indicate that the adsorption of iron ions occurs with the formation of hydroxide surface groups and hydrogen bonds, which apparently block their catalytic activity in the Fenton redox cycle. The higher catalytic performance of AND + DND composite functionalized with copper ions makes it possible to detect two times lower concentrations of analytes (phenol and 4-chlorophenol) in comparison with the original composite. It is shown that the AND + DND + Cu composite provides a linear yield of the co-oxidation reaction product in a wide range of analyte concentrations (0.25–100 μM for phenol and 0.5–25 μM for 4-chlorophenol). Model experiments demonstrate the applicability of copper-functionalized composite as a reusable sensor for the determination of phenol in aqueous samples.

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Держатели документа:
Institute of Biophysics SB RAS, Akademgorodok 50/50, Krasnoyarsk, 660036, Russian Federation
Institute of Computational Modelling SB RAS, Akademgorodok 50/44, Krasnoyarsk, 660036, Russian Federation
Kirensky Institute of Physics SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodny 79, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Ronzhin, N. O.; Posokhina, E. D.; Mikhlina, E. V.; Shestakov, N. P.; Шестаков, Николай Петрович; Nemtsev, I. V.; Немцев, Иван Васильевич; Bondar, V. S.; Ryzhkov, I. I.
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Lundin, A. G.
The dipolar fluctuation spectrum and the shape of the wings of nuclear-magnetic-resonance absorption-spectra in solids / A. G. Lundin, A. V. Makarenko, V. E. Zobov // J. Phys.: Condens. Matter. - 1990. - Vol. 2, Is. 50. - P. 10131-10145, DOI 10.1088/0953-8984/2/50/017. - Cited References: 24 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
CROSS RELAXATION
Аннотация: A theoretical approach providing the shape of the spectrum of dipolar fluctuations (Fourier transform of the longitudinal component of magnetization) and shape of the wings of NMR absorption in condensed matter has been elaborated. It is shown that the spectral contours are exponentials with the same decay constant. The results obtained explain for the first time the known experimental data and establish a connection between two groups of different experiments. The theoretical prediction is in good agreement with experimental results.

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Держатели документа:
LV KIRENSKY PHYS INST,SIBERIAN BRANCH,KRASNOYARSK 660036,USSR
ИФ СО РАН

Доп.точки доступа:
Makarenko, A. V.; Zobov, V. E.; Зобов, Владимир Евгеньевич; Лундин, Арнольд Геннадьевич
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    Mironov, V. L.
    Temperature dependent dielectric model at 1.4 GHz for an agricultural soil thawed and frozen / V. L. Mironov, A. Yu. Karavaysky // Int. Sib. Conf. on Control and Communicat. (SIBCON 2015) : Proceedings : IEEE-Institute Electrical and Electronics Engineers, 2015. - P. 1-4, DOI 10.1109/SIBCON.2015.7147092. - Cited References:9
   Перевод заглавия: Температурно зависимая диэлектрическая модель на частоте 1,4 ГГц для талой и мерзлой сельскохозяйственной почвы
Кл.слова (ненормированные):
agricultural soil -- dielectric model -- moisture -- remote sensing -- temperature -- thawed and frozen soil -- Agriculture -- Frozen soils -- Mixing -- Moisture -- Refractive index -- Remote sensing -- Soil moisture -- Soils -- Temperature -- Thawing -- Agricultural soils -- Complex refractive index -- Dielectric measurements -- Dielectric modeling -- Measurements of -- Mixing models -- Soil solids -- Temperature dependent -- Soil surveys
Аннотация: A mono-frequency dielectric model for the agricultural soil both thawed and frozen has been developed. The model is based on the soil dielectric measurements carried out in the ranges of volumetric moisture from 0,03 to 0,51 cm3/ cm3, dry soil density from 1.12 to 1.64 g/cm3, and temperature from -30 to 25°C (heating run), at the frequency of 1.4 GHz used in the SMOS mission. To fit the results of measurements of the soil complex refractive index (CRI) as a function of soil moisture, the refractive mixing model was applied. As a result, the parameters of the refractive mixing model linked to soil solids, as well as the bound, transient, and free soil water components were derived as a function of temperature. The error of the proposed dielectric model was shown to be in the order of the dielectric measurement error itself. © 2015 IEEE.

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Доп.точки доступа:
Karavaisky, A. Yu.; Каравайский, Андрей Юрьевич; Миронов, Валерий Леонидович; International Siberian Conference on Control and Communications(11 ; 2015 ; May 21-23 ; Omsk)
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10.

Stability of the superconducting d-wave pairing towards the Coulomb repulsions in cuprate superconductors / V. V. Val'kov [и др.] // VI International symposium on strong nonlinear vibronic and electronic interactions in solids : book of abstracts . - 2018. - P. 33

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Доп.точки доступа:
Val'kov, V. V.; Вальков, Валерий Владимирович; Dzebisashvili, D. M.; Дзебисашвили, Дмитрий Михайлович; Korovushkin, M. M.; Коровушкин, Максим Михайлович; Barabanov, A. F.; International symposium on strong nonlinear vibronic and electronic interactions in solids(6 ; 2018 ; April 28-May 1 ; Tartu, Estonia)
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