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Chemical disorder reinforces magnetic order in ludwigite (Ni,Mn)3BO5 with Mn4+ inclusion / S. Sofronova [et al.] // J. Magn. Magn. Mater. - 2018. - Vol. 465. - P. 201-210, DOI 10.1016/j.jmmm.2018.05.068. - Cited References: 31 . - ISSN 0304-8853
Кл.слова (ненормированные):
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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Держатели документа:
L.V. Kirensky Institute of Physics SB RAS, Krasnoyarsk, Russian Federation
Siberian State Aerospace University Named After Academician M.F. Reshetnev, Krasnoyarsk, Russian Federation
National Research Centre “Kurchatov Institute”, Moscow, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Moshkina, E. M.; Мошкина, Евгения Михайловна; Nazarenko, I. I.; Назаренко, Илья Иванович; Veligzhanin, A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Eremin, E. V.; Еремин, Евгений Владимирович; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
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Crystal growth, structure, magnetic properties and theoretical exchange interaction calculations of Cu2MnBO5 / S. Sofronova [et al.] // J. Magn. Magn. Mater. - 2016. - Vol. 420. - P. 309-316, DOI 10.1016/j.jmmm.2016.07.019. - Cited References: 35. - X-ray diffraction experiment was carried out at the Centre on Molecular Design and Ecologically Safe Technologies at the Novosibirsk State University. The reported study was funded by Russian Foundation for Basic Research (RFBR) and Government of Krasnoyarsk Territory according to the research project No. 16-42-243028. . - ISSN 0304-8853

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SPIN-GLASS BEHAVIOR
   SINGLE-CRYSTALS
   SUPEREXCHANGE INTERACTIONS
   LUDWIGITE
   DIELECTRICS
   CO3B2O6NI3B2O6
   WARWICKITES
   FE3O2BO3
   IFEFFIT
   NI3B2O6
Кл.слова (ненормированные):
Oxyborates -- Ludwigites -- XMCD -- EXAFS -- Magnetism
Аннотация: Single crystals of ludwigite Cu2MnBO5 were synthesized by flux growth technique. The detailed structural and magnetic characterizations of the synthesized samples have been carried out. The cations composition of the studied crystal was determined using X-ray diffraction and EXAFS technique, the resulting composition differ from the content of the initial Mn2O3–CuO components of the flux. Magnetic susceptibility measurements and the calculations of the exchange integrals in frameworks of indirect coupling model revealed that monoclinic distortions strongly affect exchange interactions and appearance of magnetic ordering phase at the temperature T=93 K. The hypothesis of the existence of several magnetic subsystems was supposed. © 2016 Elsevier B.V.

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Держатели документа:
L.V. Kirensky Institute of Physics, Siberian Branch of Russian Academy of Science, Krasnoyarsk, Russian Federation
M V Reshetnev Siberian State Aerospace University, Krasnoyarsk, Russian Federation
V.S. Sobolev Institute of Geology and Mineralogy, SB RAS, Novosibirsk, Russian Federation
Novosibirsk State University, Novosibirsk, Russian Federation
Institute of Physics, University of Mainz, Mainz, Germany
Institute of Inorganic and Analytical Chemistry, University of Mainz, Mainz, Germany
Lund University, MAX IV Laboratory, Lund, Sweden
National Research Centre “Kurchatov Institute”, Moscow, Russian Federation

Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Moshkina, E. M.; Мошкина, Евгения Михайловна; Nazarenko, I. I.; Назаренко, Илья Иванович; Seryotkin, Yu. V.; Nepijko, S. A.; Ksenofontov, V.; Medjanik, K.; Veligzhanin, A. A.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
}
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Crystal structure and exchange interactions of Cu2MnBO5 / S. N. Sofronova [et al.] // VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. P1.27. - P. 87. - References: 4 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
ludwigites -- exchange interactions -- single crystal -- ferrimagnetic

Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Nazarenko, I. I.; Назаренко, Илья Иванович; Veligzhanin, A. A.; Seryotkin, Yu. V.; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН

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Effect of magnetic frustrations on magnetism of the Fe3BO5 and Co3BO5 ludwigites / Y. V. Knyazev [et al.] // J. Magn. Magn. Mater. - 2019. - Vol. 474. - P. 493-500, DOI 10.1016/j.jmmm.2018.10.126. - Cited References: 33. - The Russian Foundation for Basic Research, Russia (project no. 17-02-00826-a ). S.G.O. thanks the Russian Academy of Science , Russia (project no. 0356-2017-0030 ) for financial support. J.B. and A.A. acknowledge the financial support of the Spanish MINECO-MAT2017-83468R project, Aragonese E-12 17R RASMIA (co-funded by Fondo Social Europeo), and the European Union (FEDER (ES)). . - ISSN 0304-8853
Кл.слова (ненормированные):
Antiferromagnetics -- Superexchange interactions -- Frustrations
Аннотация: The magnetic structures of Fe3BO5 and Co3BO5 ludwigites have been studied experimentally by magnetic measurements and theoretically by the combination of the group theoretical analysis and semi empiric calculations of the superexchange interactions. The different collinear spin configurations in the triads 3-1-3 and 4-2-4 including ferromagnetic, antiferromagnetic and dimer have been considered. For Fe3BO5 the antiferromagnetic state with zero magnetic moment per unit cell, showing the lowest energy, results to be the most probable magnetic ground state. The unusual magnetic structure comprising two virtually independent orthogonal subsystems is formed to avoid heavy frustrations of superexchange interactions between the 3-1-3 and 4-2-4 spin ladders. In Co3BO5 the magnetic frustrations present for the Co3+ high-spin state are quenched for a Co3+ low spin state resulting in the ferrimagnetic long-range order. The obtained results are discussed in comparison with experimental magnetic data.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian State University of Science and Technologies, Krasnoyarsk, 660014, Russian Federation
Instituto de Ciencia de Materiales de Aragon, CSIC-Universidad de Zaragoza and Departamento de Fisica de la Materia Condensada, Zaragoza, 50009, Spain
Servicio de Medidas Fisicas, Universidad de Zaragoza, Pedro Cerbuna 12, Zaragoza, 50009, Spain

Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Kazak, N. V.; Казак, Наталья Валерьевна; Nazarenko, I. I.; Назаренко, Илья Иванович; Sofronova, S. N.; Софронова, Светлана Николаевна; Rostovtsev, N. D.; Bartolome, J.; Arauzo, A.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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Heat capacity, structural and magnetic properties of mixed-valence Pb3(Mn,Cu)7O15 / N. V. Mikhashenok [et al.] // Euro-asian symposium "Trends in magnetism" (EASTMAG-2019) : Book of abstracts / чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 1. - Ст. G.03. - P. 555. - Cited References: 2 . - ISBN 978-5-9500855-7-4

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia

Доп.точки доступа:
Ovchinnikov, S. G. \чл. конс. ком.\; Овчинников, Сергей Геннадьевич; Volkov, N. V. \чл. конс. ком.\; Волков, Никита Валентинович; Dzebisashvili, D. M. \чл. прогр. ком.\; Дзебисашвили, Дмитрий Михайлович; Mikhashenok, N. V.; Михашенок, Наталья Владимировна; Soloviev, L. A.; Соловьев, Леонид Александрович; Nazarenko, I. I.; Назаренко, Илья Иванович; Eremin, E. V.; Еремин, Евгений Владимирович; Sofronova, S. N.; Софронова, Светлана Николаевна; Российская академия наук; Уральское отделение РАН; Институт физики металлов им. М. Н. Михеева Уральского отделения РАН; Уральский федеральный университет им. первого Президента России Б.Н. Ельцина; Российский фонд фундаментальных исследований; Euro-Asian Symposium "Trends in MAGnetism"(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg); "Trends in MAGnetism", Euro-Asian Symposium(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg)
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Magnetic properties of Ni3B2O6 and Co3B2O6 single crystals / L. N. Bezmaternykh [et al.] // Phys. Status Solidi B. - 2012. - Vol. 249, Is. 8. - P. 1628-1633, DOI 10.1002/pssb.201147518. - Cited References: 12. - This study was supported by the Siberian Branch of the Russian Academy of Sciences, Integration project no. 101. . - ISSN 0370-1972

РУБ Physics, Condensed Matter
Рубрики:
DIELECTRICS
Кл.слова (ненормированные):
antiferromagnets -- crystal growth -- magnetics structure -- Ni3B2O6 and Co3B2O6 single crystals
Аннотация: Orthorhombic Me3B2O6 (Me = Co, Ni) single crystals of the kotoite family are grown from the fluxes based on a mixture of bismuth trimolybdate and sodium oxide upon spontaneous nucleation. The field and temperature dependences of magnetization of the single crystals with the magnetic field oriented along the principal crystallographic directions are obtained. Unlike Ni3B2O6, Co3B2O6 exhibits strong anisotropy of the magnetic properties. At the temperature T = 10 K, the magnetization curves of Co3B2O6 reveal an anomaly attributed to the spin-reorientation transition. Strong anisotropy of the magnetic properties of Co3B2O6 is also confirmed by the calculation of the exchange interactions within a simple indirect coupling model.

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Держатели документа:
[Bezmaternykh, L. N.
Sofronova, S. N.
Volkov, N. V.
Eremin, E. V.
Bayukov, O. A.
Velikanov, D. A.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Sofronova, S. N.
Eremin, E. V.
Nazarenko, I. I.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Sofronova, S. N.; Софронова, Светлана Николаевна; Volkov, N. V.; Волков, Никита Валентинович; Eremin, E. V.; Еремин, Евгений Владимирович; Bayukov, O. A.; Баюков, Олег Артемьевич; Nazarenko, I. I.; Назаренко, Илья Иванович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
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    Magnetism and structure of Ni2MnBO5 ludwigite / E. Moshkina [et al.] // J. Magn. Magn. Mater. - 2016. - Vol. 402. - P. 69-75, DOI 10.1016/j.jmmm.2015.11.033. - Cited References: 23. - The authors are grateful to Professor N.V. Volkov and Professor A.N. Vasiliev for valuable discussions. This work was supported by Russian Foundation for Basic Research (grants No. 16-02-00055, 16-32-00318) . - ISSN 0304-8853
   Перевод заглавия: Магнетизм и структура людвигита Ni2MnBO5

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
CRYSTAL-STRUCTURE
   DIELECTRICS
   IFEFFIT
   Mn
Кл.слова (ненормированные):
Ludwigites -- Crystal structure -- Antiferromagnetic -- Indirect coupling model
Аннотация: Single crystals of ludwigite Ni2MnBO5 were synthesized by flux growth technique. The detailed structural and magnetic characterizations of the synthesized samples have been carried out. The cations composition of the studied crystal was determined using X-ray diffraction and EXAFS technique, the resulting composition is differ from the content of the initial Mn2O3–NiO components of flux. Magnetic susceptibility measurements and the calculations of the exchange integrals in frameworks of indirect coupling model revealed strong antiferromagnetic interactions and appearance of magnetic ordering phase at the temperature T=85 K. The hypothesis of the existence of several magnetic subsystems was supposed.

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Держатели документа:
L.V. Kirensky Institute of Physics SB RAS, Krasnoyarsk, Russian Federation
Siberian State Aerospace University Named after Academician M.F. Reshetnev, Krasnoyarsk, Russian Federation
National Research Centre Kurchatov Institute, Moscow, Russian Federation
Far Eastern State Transport University, Khabarovsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Moshkina, E. M.; Мошкина, Евгения Михайловна; Sofronova, S. N.; Софронова, Светлана Николаевна; Veligzhanin, A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Nazarenko, I. I.; Назаренко, Илья Иванович; Eremin, E. V.; Еремин, Евгений Владимирович; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
}
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    Nazarenko, I. I.
    Magnetic ordering dependence on iron ions distribution in Cu2FeBO5 ludwigite / I. I. Nazarenko, S. N. Sofronova, E. M. Moshkina // J. Exp. Theor. Phys. - 2018. - Vol. 126, Is. 5. - P. 674-682, DOI 10.1134/S1063776118050047. - Cited References: 18. - This study was supported by the Russian Foundation for Basic Research and the Government of Krasnoyarsk Territory (project no. 16-42-243028). . - ISSN 1063-7761. - ISSN 1090-6509
Рубрики:
DIELECTRICS
   CATION
Аннотация: A comparative analysis of the copper and iron ions bonds exchange energies was conducted for various variants of orderings and distributions of iron ions among crystallographic positions in ludwigite Cu2FeBO5. Analysis showed that the exchange bonds of iron ions play a key role in the formation of magnetic order. The magnetic ordering strongly depends on the distribution of iron ions among the positions. In the case when the Fe3+ is in the same position as in Fe3BO5, the most favorable magnetic structure is similar to the magnetic structure of ludwigite Fe3BO5. In other cases, the type of magnetic ordering is different.

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Публикация на русском языке Назаренко, Илья Иванович. Зависимость магнитного упорядочения от распределения ионов железа в людвигите Cu2FeBO5 [Текст] / И. И. Назаренко, С. Н. Софронова, Е. М. Мошкина // Журн. эксперим. и теор. физ. - 2018. - Т. 153 Вып. 5. - С. 809-819

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Moshkina, E. M.; Мошкина, Евгения Михайловна; Назаренко, Илья Иванович; Russian Foundation for Basic Research; Government of Krasnoyarsk Territory [16-42-243028]
}
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Nazarenko, I. I.
Ni5GeB2O10 Magnetic Properties Theoretical Study / I. I. Nazarenko, S. Safronova // VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. O1.1. - P. 37. - References: 4 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
ludwigites -- magnetic order -- exchange interactions -- ferrimagnetic

Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Назаренко, Илья Иванович; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН

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10.

Nazarenko, I. I.
The nickel-manganese ludwigite magnetic properties study / I. I. Nazarenko, S. N. Sofronova // Moscow Int. Symp. on Magnet. (MISM-2017) : 1-7 July 2017 : book of abstracts. - 2017. - Ст. 3OR-LT-12. - P. 455. - Cited References: 3

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Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Назаренко, Илья Иванович; Moscow International Symposium on Magnetism(7 ; 2017 ; Jul. ; Moscow); Московский государственный университет им. М.В. Ломоносова; Российский фонд фундаментальных исследований
}
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