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1.
Berzhanskii, V. N.
Critical relaxation of uniform precession of magnetization in cubic
ferrimagnets
/ V. N. Berzhanskii, V. I. Ivanov> // Phys. Status Solidi B. - 1989. -
Vol. 151
,
Is. 1
. - P. 259-267,
DOI
10.1002/pssb.2221510130. - Cited References: 22 . - ISSN 0370-1972
РУБ
Physics, Condensed Matter
WOS
Держатели документа:
LV KIRENSKII PHYS INST,KRASNOYARSK 660036,USSR
ИФ СО РАН
Доп.точки доступа:
Ivanov, V. I.; Бержанский, Владимир Наумович
}
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2.
Crystal growth, magnetic
properties and analysis of possible magnetic ordering of Ni5Sn(BO5)2 with ludwigite structure / S. Sofronova [et al.]> // Phys. Status Solidi B. - 2018. -
Vol. 255
,
Is. 12
. - Ст. 1800281,
DOI
10.1002/pssb.201800281. - Cited References: 15 . - ISSN 0370-1972
Перевод заглавия:
Рост, магнитные свойства и анализ возможных магнитных структур кристалла Ni5Sn(BO5)2 со структурой людвигита
Кл.слова (ненормированные):
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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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
Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Eremin, E. V.; Еремин, Евгений Владимирович; Chernyshov, A.; Bovina, A. F.; Бовина, Ася Федоровна
}
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3.
Martynov, S. N.
Flat and conical incommensurate magnetic structures in the two-subsystem partially frustrated Heisenberg ferrimagnet / S. N. Martynov> // J. Magn. Magn. Mater. - 2016. -
Vol. 398
. - P. 121-126,
DOI
10.1016/j.jmmm.2015.09.046. - Cited References: 21 . - ISSN 0304-8853
РУБ
Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
Spin-wave spectrum
Phase 10 K
Copper metaborate
Classical-theory
State
Кл.слова (ненормированные):
Incommensurate magnetic structures
--
Phase transitions
--
Ferrimagnets
Аннотация:
The phase transitions into flat and conical incommensurate magnetic structures are considered for a ferrimagnet with the dominant nonfrustrated exchange between the spins in one crystallographic position, competing exchanges between the spins in another position and frustrated exchange between the spins in different positions. The appearance conditions and the temperatures of the second order phase transitions are analytically obtained in the mean field approximation. The first order phase transition between these states is studied and the phase diagrams of temperature vs frustrated exchanges are calculated by the numerical minimization of free energy.
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Доп.точки доступа:
Мартынов, Сергей Николаевич
}
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4.
Sofronova, S. N.
Magnetic ordering and the role of superexchange Ni–O–B–O–Ni upon the formation of magnetic order in ludwigite Ni2MnBO5 from first-principal calculations / S. Sofronova, A. Chernyshev> // Comput. Condens. Matter. - 2024. -
Vol. 40
. - Ст. e00918,
DOI
10.1016/j.cocom.2024.e00918. - Cited References: 28 . - ISSN 2352-2143
Кл.слова (ненормированные):
Exchange interactions
--
Magnetic order
--
Ferrimagnets
--
Non-collinear ordering
--
Superexchange interactions
Аннотация:
The energies of various magnetically ordered structures for ludwigite Ni2MnBO5 have been calculated in the framework of the first-principles approach using the Wien2K program package, with the parameters of exchange interactions being determined. Two subsystems can be distinguished in the magnetic system, which are associated with the triads 4-2-4 and 3-1-3. The magnetic moments of the ions in both triads are antiferromagnetically oriented. The analysis of the exchange contribution to the energy shows that there occurs an increase of the magnetic cell relative to the crystallographic one due to antiferromagnetic ordering of the magnetic moments along the c axis in three-legged ladders formed by 4-2-4 triads. However, in three-legged ladders formed by 3-1-3 triads, the magnetic moments of the ions are ordered along the c-axis ferromagnetically. The predicted type of magnetic ordering in Ni2MnBO5 is similar to magnetic ordering in Fe3BO5. Non-collinear ordering of the magnetic moments of the subsystems at different temperatures is also likely to be observed in Ni2MnBO5, as is the case in Fe3BO5. Superexchange (indirect) interactions (No-O-B-O-Ni) influence the orientation of the magnetic moments of two 3-1-3 (4-2-4) triads within the unit cell. It is these interactions that may be responsible for the formation of long-range magnetic order in Co3BO5 and ferrimagnetic-antiferromagnetic spin-reorientation transition in Fe3BO5.
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Держатели документа:
Kirensky Institute of Physics of the Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 660036, Krasnoyarsk, Russia
Доп.точки доступа:
Chernyshev, A. V.; Чернышев, Артем Валерьевич; Софронова, Светлана Николаевна
}
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5.
Magnetic structure of
Cu2MnBO5 ludwigite: thermodynamic, magnetic properties and neutron diffraction study / E. Moshkina [et al.]> // J. Phys.: Condens. Matter. - 2017. -
Vol. 29
,
Is. 24
. - Ст. 245801,
DOI
10.1088/1361-648X/aa7020. - Cited References:28. - This study was supported by Russian Foundation for Basic Research (RFBR) and Government of Krasnoyarsk Territory according to the research project No. 16-42-243028. . - ISSN 0953-8984. - ISSN 1361-648X
Перевод заглавия:
Магнитная структура людвигита Cu2MnBO5: исследование термодинамических, магнитных свойств и с помощью метода нейтронной дифракции
РУБ
Physics, Condensed Matter
Рубрики:
HEAT
Кл.слова (ненормированные):
neutron diffraction
--
magnetic structure
--
ludwigites
--
ferrimagnets
--
magnetic susceptibility
--
specific heat
Аннотация:
We report on the thermodynamic, magnetic properties and the magnetic structure of ludwigite-type Cu2MnBO5. The specific heat, low-field magnetization and paramagnetic susceptibility were studied on a single crystal and combined with powder neutron diffraction data. The temperature dependence of the specific heat and the neutron diffraction pattern reveal a single magnetic phase transition at T = 92 K, which corresponds to the magnetic ordering into a ferrimagnetic phase. The cation distribution and the values and directions of magnetic moments of ions in different crystallographic sites are established. The magnetic moments of Cu2+ and Mn3+ ions occupying different magnetic sites in the ferrimagnetic phase are pairwise antiparallel and their directions do not coincide with the directions of the principal crystallographic axes. The small value of the magnetic moment of copper ions occupying site 2a is indicative of partial disordering of the magnetic moments on this site. The magnetization measurements show a strong temperature hysteresis of magnetization, which evidences for field-dependent transitions below the phase transition temperature.
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Держатели документа:
RAS, Kirensky Inst Phys, Fed Res Ctr KSC SB, Krasnoyarsk 660036, Russia.
Siberian State Aerosp Univ, Krasnoyarsk 660037, Russia.
Inst Max von Laue Paul Langevin, BP 156, F-38042 Grenoble 9, France.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Krasnoyarsk State Pedag Univ, Krasnoyarsk 660049, Russia.
Доп.точки доступа:
Moshkina, E. M.; Мошкина, Евгения Михайловна; Ritter, Clemens; Eremin, E. V.; Еремин, Евгений Владимирович; Sofronova, S. N.; Софронова, Светлана Николаевна; Kartashev, A. V.; Карташев, Андрей Васильевич; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Russian Foundation for Basic Research (RFBR); Government of Krasnoyarsk Territory [16-42-243028]
}
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6.
Magnetization pole reversal
of ferrimagnetic ludwigites Mn3-xNixBO5 / L. N. Bezmaternykh [et al.]> // J. Magn. Magn. Mater. - 2014. -
Vol. 364
. - P. 55-59,
DOI
10.1016/j.jmmm.2014.04.031. - Cited References: 13. - The study was supported by the Siberian Branch of the Russian Academy of Sciencesintegration Projectnos.29and2.5.2 . - ISSN 0304-8853
РУБ
Materials Science, Multidisciplinary + Physics, Condensed Matter
Кл.слова (ненормированные):
Crystal growth
--
Ferrimagnets
--
Magnetization pole reversal
Аннотация:
The conditions for the flux growth of new Mn-Ni oxyborates with the ludwigite structure are reported. Magnetic measurement data for the samples with nickel and manganese predominance are presented. Magnetization pole reversal of the ferrimagnetic phases is established and analyzed in the framework of a model comprising two antiferromagnetically interacting subsystems, each being ferrimagnetically ordered. В© 2014 Elsevier B.V.
В статье сообщают об условиях раствор-расплавного роста нового Mn–Ni оксибората со структурой людвигита. Представлены данные об магнитных измерениях для образцов с преобладанием никеля и марганца. Точка изменения знака намагниченности ферримагнитных фаз установлена и проанализирована в рамках модели, включающей две антиферромагнитным образом взаимодействующих подсистемы, каждая из которых является ферримагнитноупорядоченной.
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Доп.точки доступа:
Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Kolesnikova, E. M.; Колесникова, Евгения Михайловна; Eremin, E. V.; Еремин, Евгений Владимирович; Sofronova, S. N.; Софронова, Светлана Николаевна; Volkov, N. V.; Волков, Никита Валентинович; Molokeev, M. S.; Молокеев, Максим Сергеевич
}
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7.
Berzhanskii, V. N.
Relaxation of uniform magnetization precession in collinear cubic
ferrimagnets
in the paramagnetic neighborhood of TC / V. N. Berzhanskii, V. I. Ivanov, A. V. Lazuta> // JETP Letters. - 1990. -
Vol. 52
,
Is. 9
. - P. 483-487. - Cited References: 10 . - ISSN 0021-3640
РУБ
Physics, Multidisciplinary
Рубрики:
CDCR2SE4
Аннотация:
The characteristic features of the critical spin dynamics of the cubic
ferrimagnets
Y3Fe5O12 and MnFe2O4 in the exchange temperature region above T(c) have been studied. The magnetic-dipole relaxation of the uniform magnetization of these
ferrimagnets
is shown to be suppressed. The relaxation channel due to the local uniaxial anisotropy, with a new temperature dependence, is the dominant channel.
WOS
Держатели документа:
LV KIRENSKY PHYS INST,KRASNOYARSK,USSR
ИФ СО РАН
Доп.точки доступа:
Ivanov, V. I.; Lazuta, A. V.; Бержанский, Владимир Наумович
}
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8.
Transformation of structure
and magnetic properties of Cu2MnBO5 under partial Mn3+ → Fe3+ substitution / E. M. Moshkina [et al.]> // J. Magn. Magn. Mater. - 2018. -
Vol. 464
. - P. 1-10,
DOI
10.1016/j.jmmm.2018.05.021. - Cited References: 25. - This study was supported by Russian Foundation for Basic Research ( RFBR ) and Government of Krasnoyarsk Territory according to the research project No. 16-42-243028. X-ray diffraction experiment was carried out at the Centre on Molecular Design and Ecologically Safe Technologies at the Novosibirsk State University. The work of one of the coauthors (M.S.P.) was supported by the Russian Foundation for Basic Research (project no. 16-32-60049) and by the program of Foundation for promoting the development of small enterprises in scientific and technical sphere (“UMNIK” program). . - ISSN 0304-8853
Перевод заглавия:
Трансформация структуры и магнитных свойств Cu2MnBO5 при частичном замещении Mn3+ → Fe3+
Кл.слова (ненормированные):
Ludwigites
--
Crystal growth
--
Ferrimagnets
--
Quasi-low-dimensional structure
--
Magnetic phase transitions
Аннотация:
Single crystals of Fe-substituted Cu2Mn1-xFexBO5 ludwigites have been synthesized using flux technique (x = 0.2, 0.4, 0.5 – in the initial flux system). Structural properties of the synthesized compounds were studied by the single crystal and powder X-ray diffraction analysis. Obtained results were analyzed in the relationship with parent compound Cu2MnBO5. It was revealed that the type of monoclinic distortions of Fe-substituted ludwigites is different from the structure of Cu2MnBO5. The real cation composition and local structure of Cu2Mn1-xFexBO5 ludwigites were studied using XANES and EXAFS techniques, respectively. Analysis of field and thermal dependencies of magnetization showed a high dependence of the magnetic properties of these ludwigites on x with changing the type of magnetic ordering.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian State University of Science and Technologies, Krasnoyarsk, Russian Federation
V.S. Sobolev Institute of Geology and Mineralogy, SB RAS, Novosibirsk, Russian Federation
Novosibirsk State University, Novosibirsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Moshkina, E. M.; Мошкина, Евгения Михайловна; Platunov, M. S.; Платунов, Михаил Сергеевич; Seryotkin, Y. V.; Bovina, A. F.; Бовина, Ася Федоровна; Eremin, E. V.; Еремин, Евгений Владимирович; Sofronova, S. N.; Софронова, Светлана Николаевна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
}
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