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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Patrin K. G., Volkov N. V., Petrakovskii G. A., Boni P., Clementyev E., Sablina K. A., Eremin E. V., Vasilev V., Vasiliev A. D., Molokeev M. S.
Заглавие : (La0.4Eu0.6)0.7Pb0.3MnO3 single crystal: magnetic and transport properties; electron magnetic resonance measurements
Коллективы : "New Layered 3d-Materials for Spintronics", Workshop INTAS - Siberian Branch of the Russian Academy of Sciences Scientific Cooperation on the Research Project
Место публикации : Workshop INTAS - Sib. Branch of the RAS Sci. Cooperation on the Res. Project “New Layered 3d-Materials for Spintronics”/ chairman G. A. Petrakovskii. - 2007. - P.15
Аннотация: INTAS (The International Association for the Promotion of Cooperation with Scientists from the New Independent States of the Former Soviet Union) — международная ассоциация по содействию сотрудничеству с учёными новых независимых государств бывшего Советского Союза. Некоммерческая организация, финансировалась главным образом из бюджета Европейского Союза. Являлась крупнейшим фондом, поддерживающим научное сотрудничество между учёными стран бывшего СССР и Европейского Союза с 1993 г. Программы INTAS охватывали широкий круг научно-исследовательских проблем. 22 сентября 2006 года было принято решение о прекращении осуществления программы на основании рекомендации Европейской Комиссии. С 1 апреля 2007 года прекратилось распределение новых грантов.
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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 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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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Volkov N.V., Eremin E.V.,, Tarasov A.S., Varnakov S.N., Ovchinnikov S.G.
Заглавие : Bias-current and optically driven transport properties of the hybrid Fe/Si02/p-Si structures
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Moscow Int. Symp. on Magnet. (MISM-2011): Book of abstracts. - 2011. - Ст.22PO-I-10. - P.109
Примечания : Библиогр.: 1. - This study was supported by the Russian Foundation for Basic research, project no. 11-02-00367-a; Presidium of the Russian Academy of Sciences, program 21.1; the Division for Physical Sciences of the Russian Academy of Sciences, program 2.4.4.1; the Siberian Branch of the Russian Academy of Sciences, projects nos. 5 and 134; and the Federal target program, State contract NK-556P_15.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Volkov N. V., Eremin E. V., Tarasov A. S., Varnakov S. N., Ovchinnikov S. G.
Заглавие : Bias-current and optically driven transport properties of the hybrid Fe/SiO 2/p-Si structures
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Diffusion and Defect Data Pt.B: Solid State Phenomena. - 2012. - Vol. 190. - P.526-529. - ISBN 1012-0394, DOI 10.4028/www.scientific.net/SSP.190.526. - ISBN 9783037854365
Ключевые слова (''Своб.индексиров.''): hybrid structure--mis transition--photoelectric effect--schottky barrier--channel switching--comparative analysis--electron hole pairs--fe films--fe layer--ferromagnetic films--hybrid structure--optical effects--optical radiations--photogeneration--planar geometries--schottky barriers--semiconductor substrate--temperature variation--critical currents--interfaces (materials)--magnetic materials--photoelectricity--schottky barrier diodes--silicon--switching circuits--transport properties
Аннотация: Pronounced optical- and bias-current-sensitive features of the transport properties of a Fe/SiO 2/p-Si hybrid structure in planar geometry at temperature variation are investigated. Comparative analysis of two Fe/SiO 2/p-Si samples, one with a continuous Fe film and the other with two electrodes formed from a Fe layer and separated by a micron gap, shows that these features are due to the MIS transition with a Schottky barrier near the interface between SiO 2 and p- Si. Resistance of such a MIS transition depends exponentially on temperature and bias. In the structure with a continuous ferromagnetic film, the competition between conductivities of the MIS transition and the Fe layer results in the effect of current channel switching between the Fe layer and a semiconductor substrate. Within certain limits, this process can be controlled by a bias current and optical radiation. The mechanism of the optical effect is photogeneration of electron-hole pairs in the semiconductor substrate near its boundary with SiO 2 layer. В© (2012) Trans Tech Publications.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Tarasov A. S., Rautskii M. V., Lukyanenko A. V., Volochaev M. N., Eremin E. V., Korobtsov V .V., Balashev V. V., Vikulov V. A., Solovyov L. A., Volkov N. V.
Заглавие : Characterization and magnetotransport properties of textured Fe3O4 films
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016): abstracts/ ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk: KIP RAS SB, 2016. - Ст.O10.21. - P.465. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 2. - This work was partially supported by RFBR project no. 14-02-00234, the RAS «Far East» Program No 0262-2015-0057
Ключевые слова (''Своб.индексиров.''): magnetite--texture film--spin-dependent transport
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sofronova S. N., Moshkina E. M., Nazarenko I. I., Veligzhanin A., Molokeev M. S., Eremin E. V., Bezmaternykh L. N.
Заглавие : Chemical disorder reinforces magnetic order in ludwigite (Ni,Mn)3BO5 with Mn4+ inclusion
Место публикации : J. Magn. Magn. Mater. - 2018. - Vol. 465. - P.201-210. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2018.05.068
Примечания : Cited References: 31
Ключевые слова (''Своб.индексиров.''): oxide--oxyborate--magnetism--crystal growth--exafs
Аннотация: Crystals of ludwigite Ni2.14Mn0.86BO5 were synthesized by flux growth technique. We show in the paper that it contains Mn3+ and Mn4+. A possible mechanism of the manganese valence states stabilization has been proposed. The structural and magnetic characterization of the synthesized samples has been carried out in detail. The cations composition and Mn valence states of the crystal were determined using X-ray diffraction and EXAFS technique. The comparative analysis was carried out between the studied crystal and Ni2MnBO5 synthesized previously. Magnetic susceptibility measurements were carried out. The magnetic transition in the studied composition occurs at the 100 K that is higher than in Ni2MnBO5 although the studied composition is more disordered. The calculations of the exchange integrals in the frameworks of indirect coupling model revealed strong antiferromagnetic interactions. The several magnetic subsystems existence hypothesis was supposed. The possible magnetic structure was suggested from the energies estimation for different ordering variants.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Eremin E. V., Gudim I. A., Temerov V. L., Smolyakov D. A., Molokeev M. S.
Заглавие : Comparing the magnetic and magnetoelectric properties of the SmFe3(BO3)4 ferroborate single crystals grown using different solvents
Коллективы : Russian Foundation for Basic Research (RFBR) [18-02-00696_a]; RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [18-42-240011 p_a]
Место публикации : J. Cryst. Growth. - 2019. - Vol. 518. - P.1-4. - ISSN 0022-0248, DOI 10.1016/j.jcrysgro.2019.04.017. - ISSN 1873-5002(eISSN)
Примечания : Cited References: 17. - This study was supported by the Russian Foundation for Basic Research (RFBR) according to the research projects No. 18-02-00696_a and RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund by project No. 18-42-240011 p_a.
Предметные рубрики: POLARIZATION
FEATURES
Ключевые слова (''Своб.индексиров.''): impurities--growth from solutions--single crystal growth--borates--ferroelectric materials--magnetic materials
Аннотация: SmFe3(BO3)4 single crystals have been grown from the bismuth trimolybdate and lithium tungstate-based melt–solutions. Samarium ferroborate single crystals were grown first from the lithium–tungstate flux. The magnetic and magnetoelectric properties of the synthesized crystals have been compared. It is shown that the SmFe3(BO3)4 ferroborate grown from the bismuth trimolybdate-based melt–solution contains impurities of Bi3+ ions (∼5% at.), which replace Sm3+ ions, while the SmFe3(BO3)4, ferroborate grown from the lithium tungstate-based melt–solution contains minor or zero amounts of such impurities. The magnetoelectric and magnetodielectric effects with the Bi3+ admixture appeared 1.5× stronger than in SmFe3(BO3)4; this is probably due to twinning.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Gudim, I. A., Eremin E. V., Temerov V. L., Volkov N. V.
Заглавие : Comparision of magnetic properties of TmAl3(BO3)4 and TmAl2,75Sc0,25(BO3)4 crystals
Коллективы : "Магнитные материалы. Новые технологии", Байкальская международная конференция, "Magnetic materials. New tecnologies", Baikal International Conference, Байкальская международная конференция "Магнитные материалы. Новые технологии", Иркутский государственный университет
Место публикации : Магнитные материалы. Новые технологии: тез. докл. VII Байкал. Междунар. конф./ Иркутский гос. ун-т. - Иркутск, 2016. - P.97. - ISBN 978-591-345-152-1: тез. докл. VII Байкал. Междунар. конф. BICMM-2016/ "Magnetic materials. New tecnologies", Baikal International Conference (7 ; 2016 ; Aug. ; 22–26 ; Listvyanka, Irkutsk region), Иркутский гос. ун-т; чл. прогр. ком.: Р. С. Исхаков, С. С. Аплеснин, С. Г. Овчинников. - ISBN 978-591-345-152-1
Примечания : Библиогр.: 1 назв. - This study was supported by the Russian Foundation for Basic Research, project no. 13-02-12442, no. 14-02-00307 and no. 15-42-04186
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gudim I. A., Eremin E. V., Mikhashenok N. V., Titova V. R.
Заглавие : Comparison of magnetic properties of GdFe3(BO3)4, ferroborates grown using various solvents
Место публикации : Phys. Solid State. - 2023. - Vol. 65, Is. 2. - P.235-239. - ISSN 10637834 (ISSN), DOI 10.21883/PSS.2023.02.55406.505. - ISSN 10906460 (eISSN)
Примечания : Cited References: 18. - This study was supported by grant No. 22-12-20019 provided by the Russian Science Foundation and the Krasnoyarsk Regional Science Foundation (https://rscf.ru/project/22-72-00017/)
Аннотация: GdFe3(BO3)4, single crystals were grown from melt-solutions based on bismuth trimolybdate and lithium tungstate. Single crystals of gadolinium ferroborate from lithium-tungstate solution-melt were grown for the first time. The magnetic properties of the grown crystals are compared. It is shown that the GdFe3(BO3)4, ferroborate obtained using bismuth solution-melt trimolybdate contains impurities of Bi3+ ions (6% at.), which replace Gd3+ ions. Whereas GdFe3(BO3)4, ferroborate grown from a solution-melt based on lithium tungstate does not seem to contain such uncontrolled impurities.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Moshkina E. M., Eremin E. V., Veligzhanin, Alexey, Pavlovskiy M. S., Sofronova S. N., Titova, Veronika, Bezmaternykh L. N.
Заглавие : Concentration transition in Cu2(Mn,Ga)BO5 solid solutions
Колич.характеристики :13 с
Место публикации : J. Magn. Magn. Mater. - 2023. - Vol. 584. - Ст.171072. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2023.171072. - ISSN 18734766 (eISSN)
Примечания : Cited References: 27
Аннотация: The effects related to the conversion of magnetic structures of a Cu2MnBO5 ferrimagnet to a Cu2GaBO5 antiferromagnet under the Mn3+ → Ga3+ substitution were studied. The properties of four single crystal samples with the gallium concentration x = 0.04, 0.11, 0.17, 0.25 were examined. The chemical composition and valence state of the samples were determined by X-ray absorption spectroscopy element-sensitive technique. Distribution of the 3d metal ions over crystallographic positions was studied using the first principle calculations by Wien2k program. The evolution of the magnetic properties was investigated by the measurements of the temperature and field dependences of magnetization, dc and ac magnetic susceptibility. In agreement with the previous study of the structure evolution of Cu2Mn1-xGaxBO5 solid solutions, the critical concentration upon a change in the magnetic ordering type was found in the range x = 0.17–0.25. The non-monotonic behavior of magnetization in terms of the gallium content was found in the concentration range of 0.04–0.17. A complex pattern of magnetic phase transitions belonging to the concentration phase boundary was obtained in the compounds with gallium being within the range x = 0.17–0.25. One could observe the splitting of the peaks of the real part of ac-susceptibility of the high-temperature phase transition in the Cu2MnBO5-like phase (x = 0.04, 0.11) and that of the low-temperature one at the concentration boundary (x = 0.17, 0.25) with different frequency and orientational dependence. The type and origin of the multiple phase transitions observed in the studied samples were analyzed.
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12.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Eremin E. V., Molokeev M. S., Veligzhanin A. A., Pavlovsky M. S., Kuchesheva-Titova V. R., Bezmaternykh L. N., Moshkina E. M.
Заглавие : Concentrational transition in Cu2(Mn,Ga)BO5 solid solutions
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. 2, Sect. G: Frustrated and disordered magnetism. - Ст.G.O1. - P.2-3. - ISBN 978-5-94469-051-7
Примечания : Cited References: 4. - The study was supported by the Russian Science Foundation (grant No. 21-72-00130)
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13.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Volkov N.V., Eremin E.V., Varnakov S.N., Ovchinnikov S.G., Tarasov A.S.
Заглавие : Controlled channel switching in hybrid tunnel structures
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Уральское отделение РАН
Место публикации : IV Euro-Asian Symposium "Trends in MAGnetism" Nanospintronics (EASTMAG-2010). School for young scientist "Spintronics": June 28 - Lule 2, 2010"Book of abstracts. - Ekaterinburg, 2010. - P.200
РИНЦ
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14.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Komogortsev S. V., Iskhakov R. S., Zimin A. A., Korenev S. V., Filatov E. Yu., Shubin Yu. V., Chizhik N. A., Yurkin G.Yu., Eremin E. V.
Заглавие : Correlation of magnetic anisotropy energy and order parameter in nanostructured CoPt particles
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism: abstracts. - Vladivostok: FEFU, 2013. - С. 70. - ISBN 978-5-7444-3124-2
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15.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Komogortsev S. V., Iskhakov R. S., Zimin A. A., Filatov E. Yu. , Korenev S. V. , Shubin Yu. V. , Chizhik N. A. , Yurkin G.Yu., Eremin E. V.
Заглавие : Correlation of magnetic anisotropy energy and order parameter in nanostuctured CoPt particles
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism: abstracts. - Vladivostok: FEFU, 2013. - С. 246. - ISBN 978-5-7444-3124-2
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Аплеснин, Сергей Степанович, Udod L. V., Sitnikov M. N., Eremin E. V., Molokeev M. S., Tarasova L. S., Yanushkevich K. I., Galyas A. I.
Заглавие : Correlation of the magnetic and transport properties with polymorphic transitions in bismuth pyrostannate Bi2(Sn1 − xCr x)2O7
Коллективы : Russian Foundation for Basic Research [15-02-01445-a], Ministry of Education and Science of the Russian Federation [114090470016]
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 57, Is. 8. - P.1627-1632. - ISSN 1063-7834, DOI 10.1134/S1063783415080028
Примечания : Cited References: 17. - This study was supported by the Russian Foundation for Basic Research (project no. 15-02-01445-a) and the Ministry of Education and Science of the Russian Federation (state task no. 114090470016).
Предметные рубрики: GAS SENSORS
Bi2Sn2O7
CRYSTAL
Аннотация: The correlation of the electrical, magnetic, and structural properties of Bi2(Sn1 − xCrx)2O7 solid solutions has been investigated for two compositions with x = 0.05 and 0.1. The temperatures of structural phase transitions and anomalies of the electrical resistance in the vicinity of these transitions at temperatures in the range 300 K ˂ T ˂ 1000 K have been determined using differential scanning calorimetry. It has been found that the thermoelectric power changes sign upon the polymorphic transition. The paramagnetic Curie temperature and the chromium-ion spin have been found from the temperature dependence of the magnetic susceptibility in the range 4 K ˂ T ˂ 1000 K and from the field dependence of the magnetic moment in magnetic fields of up to 6 T.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Moshkina E. M., Seryotkin Y., Bovina A. F., Molokeev M. S., Eremin E. V., Belskaya N., Bezmaternykh L. N.
Заглавие : Crystal formation of Cu-Mn-containing oxides and oxyborates in bismuth-boron fluxes diluted by MoO3 and Na2CO3
Место публикации : J. Cryst. Growth. - 2018. - Vol. 503. - P.1-8. - ISSN 00220248 (ISSN), DOI 10.1016/j.jcrysgro.2018.09.011
Примечания : Cited References: 26. - This study was supported by Russian Foundation for Basic Research (RFBR) according to the research project No. 17-02-00953 A.
Ключевые слова (''Своб.индексиров.''): characterization--growth from solutions--single crystal growth--manganites--magnetic materials
Аннотация: The high-temperature crystallizing phases of fluxes (molten solutions) based on Bi2O3:MoO3 = 1:3 and diluted by Na2CO3 and B2O3 (under varying of Na2CO3:B2O3), and by CuO and Mn2O3 (0 ≤ Mn2O3:CuO ≤ 5) are studied. The conditions of the stable crystallization of Mn2+1−xCuxMoO4, Mn23+O3, Mn2+Mn23+O4, Mn2+1−xCuxMn3+BO4 and Mn2+2−xCuxMn3+BO5 have been found. The influence of MoO3 and Na2CO3 to the crystallization processes of Mn2+- and Mn3+-containing Mn2+1−xCuxMoO4 and Mn2+Mn23+O4 and Mn23+O3 are clarified. The occurrence of the chemical bonds of these types at the crystallization of Mn-heterovalent Mn2+1−xCuxMn3+BO4 and Mn2+2−xCuxMn3+BO5 oxyborates is studied. Single crystal growth techniques of these oxyborates are suggested. The results of the structural and magnetic characterization of some discussed compounds are presented.
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18.

Вид документа : Однотомное издание
Шифр издания :
Автор(ы) : Gudim I. A., Eremin E. V., Temerov V. L.
Заглавие : Crystal growth and magnetic properties of Nd1-xDyxFe3(BO3)4"
Место публикации : ArXiv. - 2009. - Ст.arxiv:0906.2250
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sofronova S. N., Bezmaternykh L. N., Eremin E. V., Chernyshov A., Bovina A. F.
Заглавие : Crystal growth, magnetic properties and analysis of possible magnetic ordering of Ni5Sn(BO5)2 with ludwigite structure
Место публикации : Phys. Status Solidi B. - 2018. - Vol. 255, Is. 12. - Ст.1800281. - ISSN 03701972 (ISSN), DOI 10.1002/pssb.201800281
Примечания : Cited References: 15
Ключевые слова (''Своб.индексиров.''): ferrimagnets--ludwigites--magnetic phase transitions--quasi-low-dimensional structures
Аннотация: The ludwigite Ni5Sn(BO5)2 belongs to a family of oxyborates, and has an ordered distribution of nonmagnetic Sn ions. This material is studied here using magnetic measurements. Ni5Sn(BO5)2 does not show full long-range magnetic order, but exhibits a partial ordering at 73 K. A theoretical group analysis is performed and different models of the magnetic structure of Ni5Sn(BO5)2 are discussed.
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20.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Platunov M. S., Ivanova N. B., Kazak N. V., Bezmaternykh L. N., Vasil'ev A. D., Eremin E. V., Ovchinnikov S. G.
Заглавие : Crystal structure and magnetism OF Co2-xNixB2O5 pyroborate
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Moscow Int. Symp. on Magnet. (MISM-2011): Book of abstracts. - 2011. - Ст.22PO-I-59 . - P.158
Аннотация: The crystal structure and magnetic properties of Co3B2O6 single crystals are studied. Orthorhombic symmetry with space group Pnnm is detected at room temperature. The measurements of static magnetization and dynamic magnetic susceptibility reveal two magnetic anomalies at T 1 = 33 K and T 2 = 10 K and an easy-axis magnetic anisotropy. The effective magnetic moment indicates a high-spin state of the Co2+ ion. A spin-flop transition is found at low temperatures and H sf = 23 kOe. EXAFS spectra of the K-edge absorption of Co are recorded at various temperatures, the temperature-induced changes in the parameters of the local environment of cobalt are analyzed, and the effective Co-Co and Co-O distances are determined. The magnetic interactions in the crystal are analyzed in terms of an indirect coupling model.
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