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Structural and electronic parameters of ferroelectric K3WO3F3 / V. V. Atuchin [et al.] // Solid State Commun. - 2010. - Vol. 150, Is. 43-44. - P. 2085-2088, DOI 10.1016/j.ssc.2010.09.023. - Cited References: 34. - This study was partly supported by RFBR (Grant 09-02-00062) and SB RAS (Grant 34). . - ISSN 0038-1098

РУБ Physics, Condensed Matter
Рубрики:
CORE-LEVEL SPECTROSCOPY
   PHASE-TRANSITIONS
   RHEED ANALYSIS
   SURFACE
   OXYFLUORIDE
   ELPASOLITE
   (NH4)(2)KWO3F3
   SUBSTITUTION
   TEMPERATURE
   DIFFRACTION
Кл.слова (ненормированные):
Ferroelectrics -- Chemical synthesis -- Electronic structure -- Photoelectron spectroscopies
Аннотация: The low-temperature ferroelectric G2 polymorph of K3WO3F3 oxyfluoride is formed by chemical synthesis. The electronic parameters of G2-K3WO3F3 have been measured by X-ray photoelectron spectroscopy under excitation with Al K alpha radiation (1486.6 eV). Detailed spectra have been recorded for all element core levels and Auger lines. The chemical bonding effects in the WO3 F-3 and WO6 octahedrons are considered by using the binding energy difference Delta BE(O-W) = BE(O 1s) BE(W 4f(7/2)). (C) 2010 Elsevier Ltd. All rights reserved.

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Держатели документа:
[Atuchin, V. V.] SB RAS, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia
[Gavrilova, T. A.] SB RAS, Inst Semicond Phys, Lab Nanolithog & Nanodiagnost, Novosibirsk 630090, Russia
[Kesler, V. G.] SB RAS, Inst Semicond Phys, Lab Phys Principles Integrated Microelect, Novosibirsk 630090, Russia
[Molokeev, M. S.
Aleksandrov, K. S.] SB RAS, Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Atuchin, V. V.; Gavrilova, T. A.; Kesler, V. G.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
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Bi2(Sn0.95Cr0.05)2O7: Structure, IR spectra, and dielectric properties / S. S. Aplesnin [et al.] // Ceram. Int. - 2016. - Vol. 42, Is. 4. - P. 5177-5183, DOI 10.1016/j.ceramint.2015.12.040. - Cited References: 45. - This work was supported by the Russian Foundation for Basic Research Projects no. 15-42-04099 r_siberia_a, Siberian Branch of Science and NAS of Belarus “Electronic and magnetic phase transitions in materials with magnetoelectric affect” and government work no. 114090470016. . - ISSN 0272-8842

РУБ Materials Science, Ceramics
Рубрики:
BISMUTH PYROSTANNATE
   PYROCHLORE STRUCTURE
   MAGNETIC-PROPERTIES
   PARTIAL OXIDATION
   HIGH-TEMPERATURE
   X-RAY
   Bi2Sn2O7
   SUBSTITUTION
   CATALYSTS
   DIFFRACTION
Кл.слова (ненормированные):
Bismuth pyrostannate -- Infrared absorption spectra -- Structural transition -- Permittivity -- Debye model
Аннотация: Infrared absorption spectra of the bismuth pyrostannate Bi2(Sn0.95Cr0.05)2O7 were investigated in the frequency range 350-1100 cm-1 at temperatures of 110-525 K. Four frequency regions with split absorption lines are distinguished. Softening of frequencies at the structural transitions was observed. The maxima of permittivity measured in the frequency range 1-200 kHz at temperatures 100-400 K were determined. It was found that the magnetic susceptibility changes its sign in the low-temperature region. The correlation between anomalies in the magnetic susceptibility, permittivity, and absorption line intensity was established. Softening of frequencies is explained by the variation in the coefficient of thermal expansion of the lattice. The temperature behavior of permittivity is described using the Debye model. © 2015 Elsevier Ltd and Techna Group S.r.l.

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Держатели документа:
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Akademgorodok 50, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Udod, L. V.; Удод, Любовь Викторовна; Sitnikov, M. N.; Shestakov, N. P.; Шестаков, Николай Петрович
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    Structure and luminescence properties of Eu2+ doped LuxSr2-xSiNxO4-x phosphors evolved from chemical unit cosubstitution / Z. Xia [et al.] // J. Mater. Chem. C. - 2016. - Vol. 4, Is. 6. - P. 1336-1344, DOI 10.1039/c5tc04222d. - Cited References: 32. - This work was supported by the National Natural Science Foundation of China (Grant No. 51572023 and 51272242), the Program for New Century Excellent Talents in University of Ministry of Education of China (NCET-12-0950), Beijing Nova Program (Z131103000413047), the Funds of the State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, CAS (RERU2015022), and Fundamental Research Funds for the Central Universities (FRF-TP-15-003A2). . - ISSN 2050-7534
   Перевод заглавия: Структура и люминесцентные свойства люминофора LuxSr2-xSiNxO4-x полученного в результате со-замещения химических блоков и допированного Eu2+

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
SOLID-SOLUTION PHOSPHORS
   WHITE-LIGHT
   PHOTOLUMINESCENCE
   SUBSTITUTION
   DISCOVERY
   TRANSITIONLEDS
   EVOLUTION
   HOST
   LEDS
Аннотация: The design scheme of the chemical unit cosubstitution of [Lu3+-N3-] for [Sr2+-O2-] in Sr2SiO4:Eu2+ has been put into practice to discover the new phosphor systems with tunable luminescence properties, and the structures and photoluminescence tuning of yellow-emitting LuxSr2-xSiNxO4-x:Eu2+ phosphors have been investigated. Crystal structures of LuxSr2-x-ySiNxO4-x:yEu2+ samples were resolved using the Rietveld method, suggesting that the as-prepared Sr2SiO4 belonged to monoclinic symmetry (P21/n) of β-phase Sr2SiO4, while Sr1.97Eu0.03SiO4 and Sr1.965Eu0.03Lu0.005SiO3.995N0.005 belonged to orthorhombic symmetry (Pnma) of α-Sr2SiO4. The emission peaks of LuxSr1.97-xSiNxO4-x:0.03Eu2+ phosphors were red-shifted from 563 to 583 nm upon increasing the [Lu3+-N3-] substitution content from x = 0 to x = 0.005, furthermore, the PL emission peaks of Lu0.005Sr1.965-ySiN0.005O3.995:yEu2+ also showed a red-shift from 583 nm to 595 nm with increasing Eu2+ concentration (y = 0.03, 0.07, 0.10 and 0.15), and their corresponding red-shift mechanism has been discussed. The temperature dependent luminescence results further verified that the introduction of [Lu3+-N3-] for [Sr2+-O2-] in Sr2SiO4:Eu2+ can improve the thermal stability of the photoluminescence, which indicated that the LuxSr2-x-ySiNxO4-x:yEu2+ phosphors have potential applications in white light-emitting diodes (wLEDs). © 2016 The Royal Society of Chemistry.

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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
School of Materials Sciences and Technology, China University of Geosciences, 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

Доп.точки доступа:
Xia, Z.; Miao, S.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Chen, M.; Liu, Q.
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    New garnet structure phosphors, Lu3-xYxMgAl3SiO12:Ce3+ (x = 0-3), developed by solid solution design / H. Ji [et al.] // J. Mater. Chem. C. - 2016. - Vol. 4, Is. 12. - P. 2359-2366, DOI 10.1039/c6tc00089d. - Cited References: 33. - This work was partly supported by the National Natural Science Foundation of China (Grant No. 51511130035, 51272259, 61575182, 51572232 and 51561135015) and the Russian Foundation for Basic Research (Grant No. 15-52-53080). H. J. thanks the China Scholarship Council (CSC) for providing a scholarship to support his study in NIMS. . - ISSN 2050-7534
   Перевод заглавия: Новые люминофоры со структурой граната, Lu3-xYxMgAl3SiO12:Ce3+ (x = 0-3), полученные как твердые растворы

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
Particle-diagnosis approach
   Luminescence
   Photoluminescence
   Ce3+
   Substitution
   Discovery
   Oxygen
Аннотация: New garnet phosphors, Lu3−xYxMgAl3SiO12:Ce3+ (x = 0–3), which can be efficiently excited by blue light and emit the yellow-orange light, were developed using the solid solution design strategy combining the chemical unit substitution and the cation substitution. Crystal structures of the four compounds were reported for the first time via the Rietveld refinement of their powder XRD patterns. All phosphors show the general cubic garnet structure with the space group Iad. The specific occupancy of Lu/Y, Al/Mg, Al/Si and O atoms in different positions was identified. The evolution of cell parameters and Y/Lu/Ce–O bond lengths were identified. Photoluminescence properties were evaluated on aspects of emission/excitation spectra, internal/external quantum efficiency and thermal emission stability. Under the 450 nm blue light excitation, the phosphors exhibit bright yellow color emission, peaking in the 575–597 nm spectral range. The internal and external quantum efficiency can reach 83% and 58%, respectively. The emission red-shift in response to the Y/Lu ratio variation was discussed in relation to the local structure evolution. The phosphors are relatively promising to act as wavelength converter of blue light in white light emitting diodes.

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Держатели документа:
National Laboratory of Mineral Materials, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing, China
Sialon Group, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan
College of Optical and Electronic Technology, China Jiliang University, Hangzhou, 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
Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China

Доп.точки доступа:
Ji, H.; Wang, L.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Hirosaki, N.; Huang, Z.; Xia, Z.; Ten Kate, O. M.; Liu, L.; Xie, R.
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Flerov, I. N.
Heat capacity and phase transitions in NH4LiSO4, Cs-x(NH4)(1-x) LiSO4, and RbLiSO4 / I. N. Flerov, A. V. Kartashev, V. A. Grankina // Phys. Solid State. - 2005. - Vol. 47, Is. 4. - P. 720-728, DOI 10.1134/1.1913987. - Cited References: 29 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
ROOM-TEMPERATURE
   MONTE-CARLO
   LINH4SO4
   SUBSTITUTION
   CRYSTALS
   SULFATE
   CSLISO4
Аннотация: The heat capacity of NH4LiSO4, RbLiSO4, and Cs-x(NH4)(1 - x) LiSO4 crystals and its behavior over a broad temperature range including the phase transition regions were studied. The entropy changes corresponding to structural transformations in these crystals were found not to be characteristic of straightforward ordering of structural blocks. The results obtained are discussed in terms of phenomenological theory and model concepts. (C) 2005 Pleiades Publishing, Inc.

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

Доп.точки доступа:
Kartashev, A. V.; Карташев, Андрей Васильевич; Grankina, V. A.; Флёров, Игорь Николаевич
}
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Ovchinnikov, S. G.
Role of zinc and nickel impurities in high-temperature superconductors / S. G. Ovchinnikov // Phys. Solid State. - 1999. - Vol. 41, Is. 4. - P. 534-538, DOI 10.1134/1.1130819. - Cited References: 32 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
PR2-XCEXCUO4+DELTA SINGLE-CRYSTALS
   SR-CU-O
   COPPER OXIDES
   MAGNETIC-PROPERTIES
   NI
   MODEL
   ZN
   SUBSTITUTION
   SCATTERING
   SPECTRUM
Аннотация: The local changes produced in the electronic structure and their effect on the physical properties of the superconducting and normal phases when zinc and nickel are substituted for copper are examined on the basis of a multiband p-d model. It is shown that strong electronic correlations suppress the S = 1 configuration of Ni2+ and cause the superposition of the S = 1/2 and S = 0 states of nickel. The change in the density of states in p- and n-type systems is studied, and the peculiarity of Zn impurity for p- type systems and Ni impurity for n-type systems is shown. The universal dependence of the T-c on the residual resistance in lightly doped superconductors and deviations from it in optimally doped systems are discussed. (C) 1999 American Institute of Physics. [S1063-7834(99)00704-2].

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Публикация на русском языке Овчинников, Сергей Геннадьевич. Роль примесей цинка и никеля в высокотемпературных сверхпроводниках [Текст] / С. Г. Овчинников // Физ. тверд. тела. - 1999. - Т. 41 Вып. 4. - С. 596-600

Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Овчинников, Сергей Геннадьевич
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Effect of Li+ and Ga3+ ion diamagnetic dilution on magnetic and resonance properties of CuGeO3 / G. A. Petrakovskii [и др.] // Fiz. Tverd. Tela. - 1996. - Vol. 38, Is. 11. - P. 3430-3438. - Cited References: 9 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
DOPED CUGEO3
NEEL STATE
SUBSTITUTION

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Доп.точки доступа:
Petrakovskii, G. A.; Vorotynov, A. M.; Sablina, K. A.; Pankrats, A. I.; Velikanov, D. A.
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    Structure evolution and photoluminescence of Lu3(Al,Mg)2(Al,Si)3O12:Ce3+ phosphors: New yellow-color converters for blue LED-driven solid state lighting / H. Ji [et al.] // J. Mater. Chem. C. - 2016. - Vol. 4, Is. 28. - P. 6855-6863, DOI 10.1039/c6tc00966b. - Cited References: 44. - This work was partially supported by the National Natural Science Foundations of China (Grant No. 51511130035, 51272259, 61575182, 51561135015, and 51572232) and the Russian Foundation for Basic Research (Grant No. 15-52-53080). We are also grateful to financial support from the JSPS KAKENHI (No. 15K06448). H. J. thanks the China Scholarship Council (CSC) for scholarship support. V. V. A. was partially supported by the Ministry of Education and Science of the Russian Federation. . - ISSN 2050-7534
   Перевод заглавия: Изменения структуры и фотолюминесценция люминофоров Lu3(Al,Mg)2(Al,Si)3O12:Ce3+: новый желтый преобразователь голубого света, получаемого от твердотельных светодиодов
Рубрики:
WHITE LEDS
   LUMINESCENCE PROPERTIES
   EMITTING-DIODES
   GARNET PHOSPHORS
   SUBSTITUTION
   Ce3+
   PHASE
   Ca
Аннотация: This paper reports the development of new phosphors using the chemical unit cosubstituting solid solution design strategy. Starting from Lu3Al5O12, the Al3+-Al3+ couple in respective octahedral and tetrahedral coordination was simultaneously substituted by a Mg2+-Si4+ pair forming the Lu3(Al2-xMgx)(Al3-xSix)O12:Ce3+ (x = 0.5-2.0) series; as a result, the CeO8 polyhedrons were compressed and the emission got red-shifted from green to yellow together with the broadening. The evolution of, the unit cell, the local structural geometry as well as the optical properties of Ce3+ in these garnet creations, in response to the gradual Mg-Si substitution for Al-Al, were studied by combined techniques of structural refinement and luminescence measurements. The new composition Lu2.97Ce0.03Mg0.5Al4Si0.5O12 was comprehensively evaluated regarding its potential application in blue LED-driven solid state white lighting: the maximum emission is at 550 nm under ?ex = 450 nm; the internal and external quantum efficiencies can reach 85% and 49%, respectively; a 1-phosphor-converted wLED lamp fabricated using the as-prepared phosphor exhibits the luminous efficacy of 105 lm W-1, the correlated color temperature of 6164 K and the color rendering index (Ra) of 75.6. The new solid solution composition series is open for further optimization to enhance the competence for commercial consideration. © 2016 The Royal Society of Chemistry.

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Держатели документа:
National Laboratory of Mineral Materials, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing, China
Sialon Group, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan
College of Optical and Electronic Technology, China Jiliang University, Hangzhou, 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
College of Materials, Xiamen University, Xiamen, China
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 Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, Russian Federation
Functional Electronics Laboratory, Tomsk State University, Tomsk, Russian Federation
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk, Russian Federation

Доп.точки доступа:
Ji, H.; Wang, L.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Hirosaki, N.; Xie, R.; Huang, Z.; Xia, Z.; Ten Kate, O. M.; Liu, L.; Atuchin, V. V.
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    Giant red-shifted emission in (Sr,Ba)Y2O4:Eu2+ phosphor toward broadband near-infrared luminescence / Z. Y. Yang, Y. F. Zhao, Y. Y. Zhou [et al.] // Adv. Funct. Mater. - 2022. - Vol. 32, Is. 1. - Ст. 2103927, DOI 10.1002/adfm.202103927. - Cited References: 60. - This research was supported by the International Cooperation Project of National Key Research and Development Program of China (2021YFE0105700), National Natural Science Foundations of China (Grant No. 51972118 and 51961145101), Guangzhou Science & Technology Project (202007020005), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X137). This work is also funded by RFBR according to the research project No. 19-52-80003 . - ISSN 1616-301X. - ISSN 1616-3028
   Перевод заглавия: Излучение с гигантским красным смещением в люминофоре (Sr,Ba)Y2O4: Eu2 + для широкополосной люминесценции в ближней инфракрасной области

РУБ Chemistry, Multidisciplinary + Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Applied + Physics, Condensed Matter
Рубрики:
LIGHT-SOURCES
   PHOTOLUMINESCENCE
   TRANSITION
   CE3+
   BLUE
   SUBSTITUTION
Кл.слова (ненормированные):
near-infrared emission -- photoluminescence -- red emission
Аннотация: Near-infrared (NIR) light-emitting diodes (LEDs) light sources are desirable in photonic, optoelectronic, and biological applications. However, developing broadband red and NIR-emitting phosphors with good thermal stability is always a challenge. Herein, the synthesis of Eu2+-activated SrY2O4 red phosphor with high photoluminescence quantum efficiency and broad emission band ranging from 540 to 770 nm and peaking at 620 nm under 450 nm excitation is designed. Sr/Ba substitution in SrY2O4:Eu2+ has been further utilized to achieve tunable emission by modifying the local environment, which facilitates the giant red-shifted emission from 620 to 773 nm while maintaining the outstanding thermal stability of SrY2O4:Eu2+. The NIR emission is attributed to the enhanced Stokes shift and crystal field strength originated from the local structural distortions of [Y1/Eu1O6] and [Y2/Eu2O6]. The investigation in charge distribution around Y/Eu provides additional insight into increasing covalency to tune the emission toward the NIR region. As-fabricated NIR phosphor-converted LEDs demonstration shows its potential in night-vision technologies. This study reveals the NIR luminescence mechanism of Eu2+ in oxide-based hosts and provides a design principle for exploiting Eu2+-doped NIR phosphors with good thermal stability.

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Держатели документа:
South China Univ Technol, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, State Key Lab Luminescent Mat & Devices, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China.
Natl Synchrotron Radiat Res Ctr, Mat Sci Grp, Sci Res Div, Hsinchu 300, Taiwan.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Engn Phys & Radioelect, Krasnoyarsk 660041, Russia.
Kemerovo State Univ, Res & Dev Dept, Kemerovo 650000, Russia.

Доп.точки доступа:
Yang, Zhiyu; Zhao, Yifei; Zhou, Yayun; Qiao, Jianwei; Chuang, Yu-Chun; Molokeev, M. S.; Молокеев, Максим Сергеевич; Xia, Zhiguo; International Cooperation Project of National Key Research and Development Program of China [2021YFE0105700]; National Natural Science Foundations of ChinaNational Natural Science Foundation of China (NSFC) [51972118, 51961145101]; Guangzhou Science & Technology Project [202007020005]; Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01X137]; RFBRRussian Foundation for Basic Research (RFBR) [19-52-80003]
}
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