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Crystal structure and magnetization of a Co3B2O6 single crystal / N. V. Kazak [et al.] // J. Exp. Theor. Phys. - 2013. - Vol. 117, Is. 1. - P. 94-107, DOI 10.1134/S1063776113060186. - Cited References: 43. - The synchrotron measurements were performed at the Kurchatov Center of Synchrotron Radiation and Nanotechnologies (state contract no. 16.552.11.7055).This work was supported by the Russian Foundation for Basic Research (project nos. 12-02-00175-a, 12-02-90410-Ukr_a, 12-02-31543mol_a, 13-02-00958-a), the President of the Russian Federation (grant no. NSh-1044.2012.2), the Siberian Branch of the Russian Academy of Sciences (project no. 38), the Ministry of Education and Science of the Russian Federation (project no. 8365), and an integration project of SO RAN-NAN of Belarus (project no. 29). . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
ABSORPTION FINE-STRUCTURE
   NICKEL ORTHOBORATE
   RAY
   GDFE3(BO3)(4)
   LUDWIGITE
   NI3(BO3)2
   NI3B2O6
   SPECTRA
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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Публикация на русском языке Особенности кристаллической структуры и намагниченности монокристалла Co3 B2 O6 [Текст] / Н. В. Казак [и др.] // Журн. эксперим. и теор. физ. - 2013. - Т. 144 Вып. 1.- P.109-125

Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660074, Russia
Krasnoyarsk State Aerosp Univ, Kransoyarsk 660014, Russia
Kurchatov Inst, Russian Res Ctr, Moscow 123182, Russia

Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Platunov, M. S.; Платунов, Михаил Сергеевич; Ivanova, N. B.; Иванова, Наталья Борисовна; Knyazev, Yu. V.; Князев, Юрий Владимирович; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Eremin, E. V.; Еремин, Евгений Владимирович; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Zubavichus, Y. V.
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    Uniaxial anisotropy and low-temperature antiferromagnetism of Mn2BO4 single crystal / N. V. Kazak [et al.] // J. Magn. Magn. Mater. - 2015. - Vol. 393. - P. 316-324, DOI 10.1016/j.jmmm.2015.05.081. - Cited References:33. - The authors wish to thank to Prof. M.V.Gorev and Prof J. Bartolome for fruitful discussions, Russian Foundation for Basic Research (Projects no13-02-00958, 13-02-00358, and 14-02-31051-mol-a), Council for Grants of the President of the Russian Federation (Project nos. NSh-2886.2014.2, and SP-938.2015.5). The work of one of coauthors (M.S.P.) was supported by the program of Foundation for Promotion of Small Enterprises in Science and Technology (Grant number 5468GU1/2014) ("UMNIK" program). . - ISSN 0304-8853. - ISSN 1873-4766
   Перевод заглавия: Одноосная анизотропия и низкотемпературный антиферромагнетизм монокристалла Mn2BO4

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
MAGNETIC-PROPERTIES
   WARWICKITE
   OXYBORATE
   PARAMETERS
   LUDWIGITE
Кл.слова (ненормированные):
Antiferromagnets -- Oxides -- Magnetic anisotropy -- Exchange interactions
Аннотация: The Mn2BO4 single crystals have been grown by the flux technique. A careful study of the crystal structure and magnetic properties have been carried out The antiferromagnetic transition at T-N=26 K has been traced through the dc magnetization and specific heat temperature dependences. Magnetic uniaxial anisotropy has been found with easy axis magnetization lying in the ab-plane. The obtained value of effective magnetic moment is assigned to the non-quenched orbital moment of Jahn-Teller Mn3+ ions. The discussion of magnetic properties is based on the superexchange interaction calculations. (C) 2015 Elsevier B.V. All rights reserved.

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Держатели документа:
RAS, LV Kirensky Inst Phys, SB, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660036, Russia.
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.
Int Lab High Magnet Fields & Low Temp, PL-53421 Wroclaw, Poland.
RAS, PN Lebedev Phys Inst, Moscow 119991, Russia.
Natl Acad Sci Ukraine, OO Galkin Donetsk Inst Phys & Engn, UA-83114 Donetsk, Ukraine.

Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Platunov, M. S.; Платунов, Михаил Сергеевич; Knyazev, Yu. V.; Ivanova, N. B.; Bayukov, O. A.; Баюков, Олег Артемьевич; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Nizhankovskii, V. I.; Gavrilkin, S. Yu.; Lamonova, K. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Foundation for Basic Research [13-02-00958, 13-02-00358, 14-02-31051-mol-a]; Council for Grants of the President of the Russian Federation [NSh-2886.2014.2, SP-938.2015.5]; program of Foundation for Promotion of Small Enterprises in Science and Technology [5468GU1/2014]
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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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