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Crystallographic classification of distortions in layer perovskite-like crystals of K2NiF4 type. Structural phase-transition in Rb2CdCl4 / K. S. Aleksandrov [et al.] // Phase Transit. - 1987. - Vol. 8, Is. 4. - P. 352. - Cited References: 3 . - ISBN 0141-1594
Рубрики:
Condensed Matter

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Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Beznosikov, B. V.; Безносиков, Борис Валерьевич; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Kruglik, A. I.; Круглик, Анатолий Иванович; European crystallographic meeting(10 ; 1986 ; Aug ; 5-9 ; Wroclaw, Poland)
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Superconducting ceramic coating obtained by plasma spraying / K. S. Aleksandrov [et al.] // Zhurnal Tek. Fiz. - 1989. - Vol. 59, Is. 8. - P. 157-159. - Cited References: 3 . - ISSN 0044-4642

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Публикация на русском языке Сверхпроводящие керамические покрытия, полученные плазменным напылением [Текст] / К. С. Александров [и др.] // Журнал технической физики. - 1989. - Т. 59 Вып. 8. - С. 157-159

Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Zvegintsev, A. G.; Lepeshev, A. A.; Петров, Михаил Иванович; Petrov, M. I.; Khabarov, V. I.; Khrustalev, B. P.; Хрусталев, Борис Петрович
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Kruglik, A. I.
The crystal-structure of rb2cdcl4 in paraelastic and ferroelastic phases / A. I. Kruglik, A. D. Vasil'ev, K. S. Aleksandrov // Phase Transit. - 1989. - Vol. 15, Is. 1. - P. 69-76, DOI 10.1080/01411598908206838. - Cited References: 8 . - ISSN 0141-1594

РУБ Crystallography + Physics, Condensed Matter

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Доп.точки доступа:
Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Круглик, Анатолий Иванович
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New magnetically ordered CoBO3 crystal / M. L. Afanas'ev [et al.] // JETP Letters. - 2001. - Vol. 74, Is. 2. - P. 82-83, DOI 10.1134/1.1405889. - Cited References: 5 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary

Аннотация: Crystals of a new CoBO3 compound were synthesized from a solution in melt. According to the X-ray diffraction data, CoBO3 crystallizes in the calcite structure with lattice parameters a(H) = 4.631 +/- 0.005, c(H) = 14.51 +/- 0.01 Angstrom. Measurements on SQUID and vibrating-coil magnetometers suggested that CoBO3 is a magnetically ordered crystal with a saturation magnetization of 50 emu/g in the basal plane at 4.2 K and a Neel temperature of 53 K. (C) 2001 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, Kirenskii Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Afanas'ev, M. L.; Balaev, A. D.; Балаев, Александр Дмитриевич; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Petrakovskii, G. A.; Петраковский, Герман Антонович; Rudenko, V. V.; Руденко, Валерий Васильевич
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Synthesis of the new oxocuprate Cu5Bi2B4O14 and investigation of its structural, magnetic, and resonant properties / G. A. Petrakovskii [et al.] // Phys. Solid State. - 2002. - Vol. 44, Is. 7. - P. 1339-1344, DOI 10.1134/1.1494633. - Cited References: 16 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
CUB2O4 COPPER METABORATE
FERROMAGNETISM
Аннотация: Single crystals of the new compound Cu5Bi2B4O14 are grown and its structural, magnetic, and resonant properties are investigated for the first time. It is found that the Cu5Bi2B4O14 crystal synthesized has a triclinic symmetry with space group P (1) over bar and the unit cell parameters a = 10.132 Angstrom, b = 9.385 Angstrom, c = 3.458 Angstrom, alpha = 105.443degrees, beta = 97.405degrees, gamma = 107.784degrees, and Z = 1. At a temperature of 24.5 K, the crystal undergoes a magnetic phase transition to the magnetically ordered state. The assumption is made that the ferrimagnetic structure of the Cu5Bi2B4O14 crystal consists of two ferromagnetic sublattices coupled through the antiferromagnetic exchange interaction. The unit cell of the crystal contains five copper ions, of which one ion belongs to the first sublattice and the other four ions form the second sublattice. Analysis of the resonant and magnetic static properties demonstrates that the Cu5Bi2B4O14 crystal exhibits an easy-axis magnetic anisotropy. The direction of the easy axis coincides with the c axis of the crystal, whereas the a and b axes are the hard magnetic axes with saturation fields approximately equal to 25 and 10 kOe, respectively. (C) 2002 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Russian Acad Sci, Inst Organ Chem, Siberian Div, Novosibirsk 630090, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Petrakovskii, G. A.; Петраковский, Герман Антонович; Sablina, K. A.; Саблина, Клара Александровна; Pankrats, A. I.; Панкрац, Анатолий Иванович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Balaev, A. D.; Балаев, Александр Дмитриевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Tugarinov, V. I.; Тугаринов, Василий Иванович; Vorotynov, A. M.; Воротынов, Александр Михайлович; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Romanenko, G. V.; Shvedenkov, Y. G.
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Magnetic and electrical properties of Fe1.91V0.09BO4 warwickite / A. D. Balaev [et al.] // J. Exp. Theor. Phys. - 2003. - Vol. 97, Is. 5. - P. 989-995, DOI 10.1134/1.1633954. - Cited References: 22. - This study was supported in part by the Russian Foundation for Basic Research (project no. 03-02-16286) and by the Federal Program “Integration” (project no. B0017) . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
ELECTRONIC-STRUCTURE
   CRYSTAL-STRUCTURE
   FE2OBO3
   CHAINS
   FE2BO4
   FEBO3
Кл.слова (ненормированные):
Electric conductivity -- Magnetic variables measurement -- Magnetization -- Single crystals -- Hopping conductivity -- Warwickite -- Iron compounds
Аннотация: We have performed a complex investigation of the structure and the magnetic and electrical properties of a warwickite single crystal with the composition Fe1.91V0.09BO4 . The results of Mossbauer measurements at T = 300 K indicate that there exist "localized" (Fe2+, Fe3+) and "delocalized" (Fe2.5+) states distributed over two crystallographically nonequivalent positions. The results of magnetic measurements show that warwickite is a P-type ferrimagnet below T = 130 K. The material exhibits hopping conductivity involving strongly interacting electrons. The experimental data are analyzed in comparison to the properties of the initial (unsubstituted) Fe2BO4 warwickite. The entire body of data on the electric conductivity and magnetization are interpreted on a qualitative basis. (C) 2003 MAIK "Nauka / Interperiodica".

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Публикация на русском языке Магнитные и электрические свойства варвикита Fe[1.91]V[0.09]BO[4] [Текст] / А. Д. Балаев [и др.] // Журн. эксперим. и теор. физ. - 2003. - Т. 124 Вып. 5. - С. 1103-1111

Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Krasnoyarsk State Tech Univ, Krasnoyarsk 660074, Russia
Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State Technical University, Krasnoyarsk, 660074, Russian Federation
Physikalisches Institut II, Universitat zu Koln, 50937 Koln, Germany

Доп.точки доступа:
Balaev, A. D.; Балаев, Александр Дмитриевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Ivanova, N. B.; Иванова, Наталья Борисовна; Kazak, N. V.; Казак, Наталья Валерьевна; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Abd-Elmeguid, M. M.; Rudenko, V. V.; Руденко, Валерий Васильевич
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Preparation and crystal structure of hydrated crystalline complex of ciprofloxacin and copper tetrachloride / A. D. Vasil'ev [et al.] // J. Struct. Chem. - 2005. - Vol. 46, Is. 2. - P. 363-370, DOI 10.1007/s10947-006-0055-8. - Cited Reference Count: 16 . - ISSN 0022-4766
Аннотация: Synthesis of a complex formed by ciprofloxacin (cfH) and copper(II) chloride is described; its crystal structure is reported and analyzed in comparison to related compounds. The obtained compound (ctH(3))CuCl4 center dot H2O (cfH(3)(2+) - double protonated cfH molecule) crystallizes as platelets of P2(1)/c symmetry having the unit cell parameters a = 13.491 (1) angstrom, b = 11.0459(7) angstrom, c = 16.299(1) angstrom; beta = 1.392(7)degrees. Carbonyl oxygen O(1) is protonated, and hydrogen atom combined with it forms an intramolecular hydrogen bond with carboxylic O(2) oxygen (O(1) center dot center dot center dot O(2) = 2.642(5) angstrom). Terminal nitrogen atom N(3) of the piperazinyl group is also protonated, and two its hydrogen atoms participate in hydrogen bonds of N-H center dot center dot center dot Cl type. The structure also has hydrogen bonds O-H center dot center dot center dot O, O-H... Cl with the participation of water molecules which occupy hydrophilic channels. Molecular ions cfH(3)(2+), make couples with intrapair pi center dot center dot center dot pi interactions.

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Доп.точки доступа:
Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Golovnev, N.N.; Churilov, G. N.; Чурилов, Григорий Николаевич
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Heat capacity, structural disorder, and the phase transition in cryolite (NH4)(3)Ti(O-2)F-5 / I. N. Flerov [et al.] // Phys. Solid State. - 2006. - Vol. 48, Is. 8. - P. 1559-1567, DOI 10.1134/S1063783406080221. - Cited References: 18 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
PEROVSKITE-LIKE OXYFLUORIDES
   CRYSTAL-STRUCTURES
   (NH4)(3)TIOF5
   (NH4)(3)WO3F3
   DIFFRACTION
Аннотация: The heat capacity, T-p phase diagrams, and unit cell parameters of cryolite (NH4)(3)Ti(O-2)F-5 were studied over a wide temperature range. A phase transition was found near 226 K, and its thermodynamic characteristics and their dependence on the crystallization conditions were determined. The coordinates and thermal parameters of atoms in the Fm3m phase were refined. An analysis of the electron density distribution and the transition entropy showed that the mechanism of the structural transition involves, above all, rotation of the Ti(O-2)F-5 octahedra. Possible models of disordering of tetrahedral ammonium groups are considered.

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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Russian Acad Sci, Inst Chem, Far E Div, Vladivostok 690022, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Institute of Chemistry, Far East Division, Russian Academy of Sciences, pr. Stoletiya Vladivostoka 159, Vladivostok, 690022, Russian Federation

Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Fokina, V. D.; Фокина, Валентина Дмитриевна; Molokeev, M. S.; Молокеев, Максим Сергеевич; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Bovina, A. F.; Бовина, Ася Федоровна; Laptash, N. M.
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Magnetic Nanoparticles in Oxide Glasses / I. S. Edelman, R. D. Ivantsov, I. G. Vasil’eva [и др.] // Physics of Metals and Metallography. - 2006. - Vol. 102, Suppl. 1, Chapter 11. - P. S2-S7DOI 10.1134/S0031918X0614002X. - Библиогр.: 13. - Integrated Project of the Siberian Division of the Russian Academy of Sciences no. 88-2003, and by the Federal Program RNP, project no. 2.1.1.7376.
Аннотация: Unique properties of the potassium–aluminum–boron glasses doped with low concentrations of MnO and Fe2O3 to make them magnetically ordered and optically transparent in the IR and visible ranges are due to the formation of nanoparticles of a cubic ferrite. Assembling and properties of nanosized ferrite particles in the glasses have been investigated by X-ray diffraction, differential dissolution analysis, high-resolution transmission electron microscopy, Mössbauer spectroscopy, magnetic measurements, and magnetooptical Faraday effect. It was shown that the ferrite particles vary highly in size, shape, stoichiometry, structural perfection, and space distribution depending on the preparation conditions. A correlation between the characteristics of nanostructured ferrite particles and magnetic properties of glasses has been established.

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Держатели документа:
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russia
Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090, Russia
Vavilov Optical State Institute, S. Petersburg, 192371, Russia
Boreskov Institute of Catalysis, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090, Russia

Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Vasil'eva, I.G.; Vasil'ev, A. D.; Bayukov, O. A.; Баюков, Олег Артемьевич; Ivanova, O. S.; Иванова, Оксана Станиславовна; Prokof'ev, D. E.; Stepanov, S.A.; Kornilova, E.E.; Zerubina, T.V.; Malakhov, V.V.; Zaikovskii, V.A.
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10.

Magnetic and electrical properties of cobalt oxyborate Co3BO5 / N. B. Ivanova [et al.] // Phys. Solid State. - 2007. - Vol. 49, Is. 4. - P. 651-653, DOI 10.1134/S1063783407040087. - Cited References: 13 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
LUDWIGITES
Аннотация: Single crystals of cobalt oxyborate Co3BO5 are synthesized. The results of investigations into the structural, magnetic, and electrical properties are reported. It is found that Co3BO5 crystals exhibit two magnetic anomalies at T (1) = 17 K and T (2) = 45 K. The temperature dependence of the electrical resistivity is investigated. Deviations both from the activation law of variation in the electrical resistance and from the Mott variable-range hopping conduction are revealed.

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Держатели документа:
Siberian Fed Univ, Polytech Inst, Krasnoyarsk 660074, Russia
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Polytechnical Institute, Siberian Federal University, ul. Kirenskogo 26, Krasnoyarsk, 660074, Russian Federation
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Ivanova, N. B.; Иванова, Наталья Борисовна; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Kazak, N. V.; Казак, Наталья Валерьевна; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Petrakovski, G. A.; Петраковский, Герман Антонович; Rudenko, V. V.; Руденко, Валерий Васильевич
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