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Каталог книг и брошюр библиотеки ИФ СО РАН (29)

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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chen Y., Liu F., Zhang Z., Hong J., Molokeev M. S., Bobrikov I. A., Shi J., Zhou J., Wu M.
Заглавие : A novel Mn4+-activated fluoride red phosphor Cs30(Nb2O2F9)9(OH)3·H2O:Mn4+ with good waterproof stability for WLEDs
Место публикации : J. Mater. Chem. C. - 2022. - Vol. 10, Is. 18. - P.7049-7057. - ISSN 20507534 (ISSN), DOI 10.1039/d2tc00132b
Примечания : Cited References: 56. - This work was financially supported by grants from the National Natural Science Foundation of China (NSFC) (No. 51802359), the Joint Funds of NSFC and Yunnan Province (No. U1702254), and Guangdong Basic and Applied Basic Research Foundation (No. 2020A1515010556)
Аннотация: Red-light-emitting materials, as pivotal components of warm white light-emitting diodes (WLEDs), have drawn increasing public focus. Among these, Mn4+-doped red light-emitting fluorides have drawn considerable attention when combined with an InGaN chip; however, they suffer from poor water stability under humid conditions. In this work, a novel fluoride red phosphor, Cs30(Nb2O2F9)9(OH)3·H2O:xMn4+ (CNOFM), with good water resistance was synthesized for the first time using a facile co-precipitation method at ambient temperature. Experiments were implemented for the precise analysis of its crystal structure, optical properties, micro-morphology, thermal behavior, and waterproof properties. 6.66% Mn4+-doped CNOFM maintained a stable crystal structure and possessed strong PL intensity located at 633 nm with high color purity of 96%. CNOFM showed better thermal and waterproof stability compared with the commercial K2SiF6:Mn4+ red phosphor. Without any surface modifications, the PL intensity remained at about 83% of the initial value after immersion in water for 60 min, and the mechanism was investigated. Finally, a warm WLED with a CRI of 92.3 and CCT of 3271 K was fabricated using the CNOFM red phosphor.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Xing, Gongcheng, Feng, Yuxin, Gao, Zhiyu, Tao, Mengxuan, Wang, Hongquan, Wei, Y.i., Molokeev M. S., Li, Guogang
Заглавие : A novel red-emitting La2CaHfO6:Mn4+ phosphor based on double perovskite structure for pc-WLEDs lighting
Место публикации : CrystEngComm. - 2019. - Vol. 21, Is. 23. - P.3605-3612. - ISSN 1466-8033, DOI 10.1039/c9ce00556k
Примечания : Cited References: 47. - This work is financially supported by the National Natural Science Foundation of China (NSFC No. 51672259).
Предметные рубрики: LUMINESCENCE PROPERTIES
ELECTRONIC-STRUCTURE
OPTICAL-PROPERTIES
SITE
Аннотация: Non-rare earth doped oxides with red emission are one of the current research hotspots for achieving the warm white light range in the phosphor converted white light emitting diodes (pc-WLEDs) field. In the current work, a novel Mn4+-activated La2CaHfO6 red phosphor is reported for the first time and its crystal structure is analyzed by Rietveld refinement. The photoluminescent properties of La2CaHfO6:Mn4+ are investigated in detail with the help of diffuse refletance spectroscopy, photoluminescence spectroscopy, and temperature-dependent PL spectroscopy. Based on the diffuse refletance spectra, the calculated optical band gap for La2CaHfO6 is 4.9 eV, indicating that La2CaHfO6 could be a suitable host for activators' doping. Under 380 nm near-ultraviolet (n-UV) light excitation, the as-prepared La2CaHfO6:Mn4+ displays intense red emission centered at 693 nm. Through an accurate calculation of Dq/B (2.47) and nephelauxetic effect β1 (0.949), the origination of strong crystal field (CF) and deep-red emission is demonstrated. By combining the representative La2CaHfO6:0.002Mn4+, blue BAM:Eu2+, and green (Ba,Sr)2SiO4:Eu2+ phosphors with a 380 nm UV chip to fabricate the pc-WLEDs device, a white light is obtained with low correlated color temperature (CCT = 5165 K) and high color rendering index (Ra = 87.8), demonstrating that the as-prepared La2CaHfO6:Mn4+ phosphors can be used as red-emitting candidate in pc-WLEDs lighting.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Tarasov I. A., Visotin M. A., Solovyov L. A., Fedorov A. S., Yakovlev I. A., Tarasov A. S., Varnakov S. N., Ovchinnikov S. G.
Заглавие : A way for targeted synthesis of higher manganese silicides: a new Mn17Si30 phase and its distinctive features
Коллективы : Nanostructures: Physics and Technology, International Symposium, Институт физики им. Б. И. Степанова НАН Беларуси, Санкт-Петербургский национальный исследовательский Академический университет Российской академии наук, Физико-технический институт им. А.Ф. Иоффе РАН, Научно-технологический центр микроэлектроники и субмикронных гетероструктур Российской академии наук
Место публикации : Nanostructures: physics and technology: proc. 26th Int. symp. - 2018. - P.209-210. - ISBN 978-985-7202-35-5
Примечания : Cited References: 3
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Tarasov I. A., Visotin M. A., Kuznetsova T. V., Solovyov L. A., Fedorov A. S., Yakovlev I. A., Tarasov A. S., Varnakov S. N., Ovchinnikov S. G.
Заглавие : A way for targeted synthesis of higher manganese silicides: a new Mn17Si3O phase and its distinctive features
Коллективы : Federal Research Center KSC SB RAS, Kirensky Institute of Physics, Research Institute of Agriculture and Ecology of the Arctic, Siberian Federal Univercity
Место публикации : International school/workshop on actual problems of condensed matter physics: Program. Book of abstracts/ ed. S. G. Ovchinnikov. - Norilsk, 2018. - P.14-15. - ISBN 978-5-904603-08-3
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Liu, Qin, Dang, Peipei, Zhang, Guodong, Molokeev M. S., Polyutov, Sergey, Lian, Hongzhou, Cheng, Ziyong, Li, Guogang, Lin, Jun
Заглавие : Achieving excellent thermostable red emission in singly Mn2+-doped near zero thermal expansion (NZTE) material Li2Zn3(P2O7)2
Колич.характеристики :10 с
Место публикации : J. Mater. Chem. C. - 2023. - Vol. 11, Is. 31. - P.10684-10693. - ISSN 20507526 (ISSN), DOI 10.1039/D3TC01683H. - ISSN 20507534 (eISSN)
Примечания : Cited References: 62. - This work wasfinancially supported by the National Science and Technology Major Project (2022YFB3503800), the Projects for Science and Technology Development Plan of Jilin Province (20210402046GH), the National Natural Science Foundation of China (NSFC No. 51932009, 51929201, 52072349, 52172166), the Natural Science Foundation of Zhejiang Province (LR22E020004), the Project funded by China Postdoctoral Science Foundation (2022TQ0365), and the Ministry of Science and High Education of Russian Federation (Project No. FSRZ2023-0006), M.S. Molokeev and S.P. Polyutov acknowledge the support by the Ministry of Science and High Education of Russian Federation (Project No. FSRZ-2023-0006)
Аннотация: The design of thermostable phosphor is still a pivotal challenge in pc-WLED applications. Herein, an efficient strategy is proposed to design excellent thermostable red emission in singly Mn2+-doped near zero thermal expansion (NZTE) material Li2Zn3(P2O7)2. Under the excitation of 412 nm wavelength, the emission could be tuned from 636 to 672 nm by increasing the Mn2+ doping level via synthetic effect among crystal field, the exchange coupling interaction in Mn-Mn dimers and energy transfer in different luminescence centers. The PL intensity of LZPO:Mn2+ maintains 97% at 150 °C and 94% at 200 °C of initial intensity at the room temperature. During the heat process, the LZPO presents near zero thermal expansion, which contributes to the nearly unaffected PL intensity. The traps assist energy transfer to luminescent center is also compensated for the emission loss. This work not only offers a perspective idea for elucidating the correlation between crystal structure and optical properties, but also opens a new way in line with that of designing excellent thermostable luminescent materials based on NZTE materials in self-reduction system.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ovchinnikov S. G., Burkova L. V., Seredkin V. A., Yakovchuk V. Y.
Заглавие : An analysis of the mechanism of Kerr effect enhancement in Mn/Dy/Bi
Место публикации : Phys. Solid State: AMER INST PHYSICS, 1999. - Vol. 41, Is. 1. - P80-86. - ISSN 1063-7834, DOI 10.1134/1.1130733
Примечания : Cited References: 35
Предметные рубрики: ELECTRONIC-STRUCTURE
THIN-FILMS
MAGNETIC-PROPERTIES
RARE-EARTH
MAGNETOOPTICAL PROPERTIES
MNBI FILMS
STABILITY
GD
Аннотация: A study is reported of the structural, magnetic, and magneto-optic properties of Mn/Dy/Bi films obtained by multilayer technology. The maximum Kerr rotation angle in such films is shown to be theta(k) = 2.25 degrees. Possible reasons for such a large Kerr effect enhancement are considered, namely, an increase in the 6p - 3d transition probability caused by symmetry distortion, polarization of the Bi6p band, and a change in the density of states near the Fermi level. The latter reason has been analyzed by simulating the electronic structure of Mn/Dy/Bi through superposition of Dy levels on the MnBi band structure. This approach has revealed possible additional transitions which may be induced by the presence of a Dy buffer and could contribute to the Kerr magneto-optic effect. (C) 1999 American Institute of Physics. [S1063=7834(99)02001-8].
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Eremin E. V., Volkov N. V., Sablina K. A., Bayukov O. A., Molokeev M. S., Komarov V. Y.
Заглавие : Analysis of the exchange magnetic structure in Pb3Mn7O15
Место публикации : J. Exp. Theor. Phys.: Maik Nauka-Interperiodica Publishing, 2017. - Vol. 124, Is. 5. - P.792-804. - ISSN 10637761 (ISSN), DOI 10.1134/S1063776117040112
Примечания : Cited References: 16
Ключевые слова (''Своб.индексиров.''): crystallography--magnetic properties--magnetic structure--magnetism--manganese--indirect couplings--manganese ions--structural and magnetic properties--single crystals
Аннотация: The indirect-coupling model is used to analyze the exchange magnetic structure of Pb3Mn7O15 in the hexagonal setting. The ratios of manganese ions Mn4+/Mn3+ in each nonequivalent position are determined. Pb3(Mn0.95Ge0.05)7O15 and Pb3(Mn0.95Ga0.05)7O15 single crystals are grown by the solution–melt method in order to test the validity of the proposed model. The structural and magnetic properties of the single crystals are studied. The magnetic properties of the grown single crystals are compared with those of nominally pure Pb3Mn7O15. © 2017, Pleiades Publishing, Inc.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Rautskii M. V., Yakovlev I. A., Varnakov S. N., Tarasov A. S.
Заглавие : Anomalous hall effect in an epitaxial Mn5Ge3 thin film on Si(111)
Коллективы : Российская академия наук, Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН, Казанский (Приволжский) федеральный университет, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022): Book of abstracts/ program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 1, Sect.: Spintronics and magnetic nanostructures. - Ст.A.P34. - P.163-164. - ISBN 978-5-94469-051-7
Примечания : Cited References: 5. - Support by Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kazak N. V., Belskaya N. A., Moshkina E. M., Bezmaternykh L. N., Vasiliev A. D., Sofronova S. N., Eremina R. M., Eremin E. V., Muftakhutdinov A. R., Cherosov M. A., Ovchinnikov S. G.
Заглавие : Antiferromagnetism of the cation-ordered warwickite system Mn2-xMgxBO4 (x=0.5, 0.6 and 0.7)
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [20-02-00559]; Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science to the research project [18-42243007]
Место публикации : J. Magn. Magn. Mater. - 2020. - Vol. 507. - Ст.166820. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2020.166820. - ISSN 1873-4766(eISSN)
Примечания : Cited References: 39. - The reported study was funded by the Russian Foundation for Basic Research (no. 20-02-00559), Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project. 18-42243007.
Предметные рубрики: SPIN-GLASS BEHAVIOR
CRYSTAL-STRUCTURES
SINGLE-CRYSTALS
INSIGHTS
MGFEBO4
Аннотация: X-ray diffraction, heat capacity and magnetic measurements are performed on single crystals of Mn2-xMgxBO4 (x = 0.5, 0.6 and 0.7) with the warwickite structure. The monoclinic symmetry is found for all samples with the space group P21/n. The M1 site is occupied by trivalent Mn ions while the M2 site is occupied by a mixture of divalent Mg and Mn ions. Regular cation and charge distributions are observed, which is unusual for heterometallic warwickites. The local octahedral distortions of M1O6 show the monotonic dependence on the Mg content and are in accordance with the Jahn-Teller distortion. All samples are found to undergo long-range antiferromagnetic ordering with rather low transition temperatures of TN = 16, 14 and 13 K for x = 0.5, 0.6, and 0.7, respectively. The ordering of local octahedral distortions, caused by the strong electron-phonon interaction of the trivalent Mn ions, is proposed to stabilise the cationic ordering and, as a result, the long-range magnetic ordering in the material.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Wu, Yanzheng, Li, Weiqiang, Zheng, Yifan, Xu, Yiqin, Wen, Dawei, Molokeev M. S., Pan, Zaifa
Заглавие : Apatite oxynitride phosphor (Mg,Y)5Si3(O,N)13:Ce3+,Mn2+: A single-phased host with solar-like and efficient emission
Место публикации : J. Am. Ceram. Soc. - 2023. - Vol. 106, Is. 5. - P.2985-2996. - ISSN 00027820 (ISSN), DOI 10.1111/jace.18981. - ISSN 15512916 (eISSN)
Примечания : Cited References: 35. - This work was supported by the National Natural Science Foundation of China (Project No. 10804099, 21804119), Key projects of Zhejiang Natural Science Foundation (Project No. LZ18B050002), GDAS’ Project of Science and Technology Development (Nos. 2021GDASYL-20210103069, 2021GDASYL-20210103071)
Аннотация: During pursuing high color rendering index for full-color-emitting phosphor, low quantum efficiency (QE) is usually accompanying. We intend to elevate the luminescence efficiency when realizing a solar-like spectra distribution, by constructing apatite structure oxynitride, inheriting high covalence and rigidity from oxynitride, and suitable multiple cation sites from oxyapatite compounds. Full-color-emitting apatite structure oxynitride phosphor (Mg,Y)5Si3(O,N)13:Ce3+,Mn2+ has been prepared, and the crystal sites’ occupancies of activators in this host were favorable for white emission. (Mg,Y)5Si3(O,N)13:Ce3+,Mn2+ phosphor shows whole visible light with emission wavelength ranging from 370 to 750 nm, matching the spectra of sunlight quite well. The fabricated white light-emitting diode lamp demonstrated the distinctive overall performance of QE and chromaticity properties (Ra and R9). Furthermore, correlated color temperature is tunable from cool nature to warm white. The obtained lamp possesses the feature of less blue light hazard and high saturation of red degree, compared with the commercial YAG-based lamp.
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