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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ovchinnikov S. G.
Заглавие : Symmetry of holes in high-temperature superconductors
Место публикации : Solid State Commun. - 1991. - Vol. 77, Is. 3. - P.221-224. - ISSN 0038-1098, DOI 10.1016/0038-1098(91)90336-T
Примечания : Cited References: 19
Предметные рубрики: FERMI-LIQUID STATES
X-RAY ABSORPTION
ELECTRONIC-STRUCTURE
PHOTOEMISSION
BI2SR2CACU2O8
BISMUTH
Аннотация: A symmetry of holes is investigated in the multielectron band theory which takes into account strong correlations. It is shown that a small number of d(z2) states appears near the Fermi level due to d(z2) Cu-2p(x(y))O charge transfer as admixture to d(x2-y2)-p(x(y)) bands with dominant contribution of O2p states. The results are in a qualitative agreement with polarized photoemission data.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Melnikova S. V., Shabanova L. A., Zaitsev A. I., Parshikov S. A., Ageev O. A., Aleksandrov K. S.
Заглавие : Ferroelastic phase transition in Cs3Bi2I9 crystal
Место публикации : Ferroelectrics, Letters Section. - 1996. - Vol. 20, Is. 5-6. - P.163-167. - ISSN 0731-5171
Ключевые слова (''Своб.индексиров.''): birefringence--cesium compounds--crystal symmetry--crystals--differential scanning calorimetry--elasticity--ferroelectricity--permittivity--stiffness--twinning--cesium bismuth iodide--elastic constant--elastic stiffness--ferroelastic phase transition--phase transitions
Аннотация: Phase transition (PT) was found in Cs3Bi2I9 single crystal at T0=223 K. Optical birefringence, dielectric and elastic constants and differential scanning calorimetry have been studied. It was found that birefringence ?nc and twinning picture appeared on (001) - and (100) - plates below T0, as well as softening of elastic stiffness C44 above T0. It allows to classify the PT as proper ferroelastic one with symmetry change 6/mmm - 2/m. В© 1996 OPA (Overseas Publishers Association) Amsterdam B.V. Published in The Netherlands under license by Gordon and Breach Science Publishers SA.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bezmaternykh L. N., Temerov V. L., Gudim I. A., Stolbovaya N.A.
Заглавие : Crystallization of trigonal (Tb,Er)(Fe,Ga)(3)(BO3)(4) phases with hantite structure in bismuth trimolybdate-based fluxes
Место публикации : Crystallogr. Rep. - 2005. - Vol. 50. - P.S97-S99. - ISSN 1063-7745, DOI 10.1134/1.2133981
Примечания : Cited Reference Count: 8
Предметные рубрики:
Аннотация: The stability regions of the trigonal (Tb,Er)(Fe,Ga)(3)(BO3)(4) phases are established in (Bi2Mo3O12)-based fluxes. The specific features of heterogeneous nucleation and the subsequent phase transformations during transition to the equilibrium are studied in the vicinity of the boundaries. The temperature modes of single crystal growth on seeds are suggested with due regard for the "nonequilibrium effect." (C) 2005 Pleiades Publishing, Inc.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shaykhutdinov K. A., Balaev D. A., Gokhfeld D. M., Kuzmin Y. I., Popkov S. I., Petrov M. I.
Заглавие : Study of current-voltage characteristics of Bi-based high-temperature superconductors with fractal cluster structure
Коллективы : International Workshop on Weak Superconductivity
Место публикации : Physica C. - 2006. - Vol. 435, Is. 1-2. - P.19-22. - ISSN 0921-4534, DOI 10.1016/j.physc.2006.01.010
Примечания : Cited References: 18
Предметные рубрики: NORMAL-PHASE
VORTEX MOTION
TRANSPORT
Ключевые слова (''Своб.индексиров.''): superconducting foam--pinning--critical current density--fractal--percolation--cluster--cluster--critical current density--fractal--percolation--pinning--superconducting foam--bismuth--critical current density (superconductivity)--electric currents--electric potential--foams--percolation (solid state)--polycrystalline materials--cluster--fractal--pinning--superconducting foam--superconducting materials
Аннотация: We study the effect of the structure on critical currents and current-voltage characteristics (CVC's) of foamed bismuth-based polycrystalline high-temperature superconductors (HTSC). The fractal cluster structure of superconducting foams has been observed and the fractal dimension of boundaries between superconducting and normal clusters has been determined. Based on the magnetic and transport properties of the foamed polycrystalline superconductors, we have shown that the initial parts of CVC's of the superconducting foams are described well by the model that accounts the magnetic flux trapping in fractal clusters of a normal phase. (c) 2006 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Balaev D. A., Belozerova I. L., Vasil'ev A. D., Gokhfel'd D. M., Mart'yanov O. N., Popkov S. I., Shaihutdinov K. A.
Заглавие : Highly textured bismuth-containing high-temperature superconductor ceramics obtained by uniaxial pressing in liquid medium: Fabrication and properties
Место публикации : Tech. Phys. Lett.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2007. - Vol. 33, Is. 9. - P740-743. - ISSN 1063-7850, DOI 10.1134/S1063785007090088
Примечания : Cited References: 12
Предметные рубрики: MICROSTRUCTURE
MAGNETIZATION
Аннотация: A new method of fabricating textured ceramics with a composition of Bi1.8Pb0.3Sr1.9Ca2Cu3Ox is described, according to which the initial low-density ceramics is subjected to uniaxial pressing in a liquid medium followed by drying and annealing. Analysis of the X-ray diffraction and scanning electron microscopy data show evidence for a high degree of texture in high-temperature superconductor ceramics fabricated using the proposed method. The results of magnetic measurements indicate that the obtained material possesses anisotropy of the magnetic moment for the magnetic field H oriented parallel and perpendicular to the direction of uniaxial pressing. The textured ceramics also show high diamagnetic response for H parallel to the c axis of grains, which makes these ceramics promising materials for practical applications.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shaykhutdinov K. A., Balaev D. A., Popkov S. I., Vasilyev A. D., Martyanov O. N., Petrov M. I.
Заглавие : Thermally activated dissipation in a novel foamed Bi-based oxide superconductor in magnetic fields
Место публикации : Supercond. Sci. Technol.: IOP PUBLISHING LTD, 2007. - Vol. 20, Is. 6. - P491-494. - ISSN 0953-2048, DOI 10.1088/0953-2048/20/6/001
Примечания : Cited References: 20
Предметные рубрики: FLUX
BI2SR2CACU2O8+DELTA
MECHANISM
PHASE
FILMS
Ключевые слова (''Своб.индексиров.''): bismuth compounds--josephson junction devices--magnetic field effects--transport properties--resistive transitions--thermally activated dissipation--oxide superconductors
Аннотация: The transport properties of a novel foamed superconductor Bi1.8Pb0.3Sr1.9Ca2Cu3Ox have been studied. As the analysis of resistive transitions in a magnetic field shows, the dissipation follows a thermally activated flux creep model with the temperature- independent pinning potential in S-N-S-type Josephson junctions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Patrin G. S., Yakovchuk V. Y., Velikanov D. A.
Заглавие : Influence of semimetal spacer on magnetic properties in NiFe/Bi/NiFe trilayer films
Место публикации : Phys. Lett. A. - 2007. - Vol. 363, Is. 1-2. - P.164-167. - ISSN 0375-9601, DOI 10.1016/j.physleta.2006.10.088
Примечания : Cited References: 19
Предметные рубрики: BISMUTH
SYSTEM
Ключевые слова (''Своб.индексиров.''): semimetal spacer--magnetization--spin accumulation--trilayer film--magnetization--semimetal spacer--spin accumulation--trilayer film
Аннотация: The results of experimental study of magnetic properties in permalloy/bismuth/permalloy trilayer films synthesized for the first time are presented. Measurements of magnetic field and temperature dependences of magnetization have shown that the interlayer coupling depends on bismuth spacer thickness. The dependence of saturation magnetization of the system on semimetal thickness has been found. Possible mechanisms responsible for the observed features of behavior are discussed. (c) 2006 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Temerov V. L., Sokolov A. Е., Sukhachev A. L., Bovina A. F., Edel'man I. S., Malakhovskii A. V.
Заглавие : Optical Properties of Trigonal Single Crystals (Yb,Tm)Al3(BO3)4 Grown from Fluxes Based on the Bismuth and Lithium Molybdates
Место публикации : Crystallography report. - 2008. - Vol. 53, No. 7. - P.1157-1162. - DOI 10.1134/S1063774508070110
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Вид документа : Статья из сборника (однотомник)
Шифр издания : Описание изобретения к патенту 2339598!-791638
Автор(ы) : Петров, Михаил Иванович, Балаев, Дмитрий Александрович, Белозерова, Ирина Леонидовна, Гохфельд, Денис Михайлович, Попков, Сергей Иванович, Мартьянов, Олег Николаевич, Шайхутдинов, Кирилл Александрович
Заглавие : Способ получения плотной текстурированной высокотемпературной сверхпроводящей керамики на основе висмута .-
Коллективы : Институт физики им. Л.В. Киренского Сибирского отделения РАН, Федеральная служба по интеллектуальной собственности (Роспатент), Федеральный институт промышленной собственности
Место публикации : Изобретения. Полезные модели: офиц. бюл. Фед. службы по интеллектуал. собственности (Роспатент). - 2008. - № 33. - ISBN 2313-7436
Аннотация: Способ получения плотной текстурированной высокотемпературной сверхпроводящей керамики на основе висмута Pb0.3Bi1.8Sr1.9Ca2Cu3Ox, которая может быть использована в электротехнике и транспорте. Техническим результатом изобретения является получение плотного материала с высокой степенью текстуры простым и нетрудоемким способом. Пористую керамику плотностью от 1.8 г/см3 до 2.4 г/см3 пропитывают этиловым спиртом и подвергают одноосному сжатию давлением 400-500 МПа при комнатной температуре. Затем просушивают и отжигают при температуре 820-850°С в течение 30-100 часов. 5 ил.Method of obtaining hard grain-oriented high-temperature superconductive ceramics on bismuth basis 1.9Ca2Cu3Ox, which can be used in electric engineering and transport industry. Porous ceramics with density of 1.8 g/cm3 to 2.4 g/cm3 is treated with ethyl alcohol and exposed to uniaxial compression with pressure of 400-500 MPa at indoor temperature. After that porous ceramics is dried and burnt off at the temperature of 820-850°C for 30-100 hours./p p num="38"EFFECT: producing hard material with high degree of grain orientation by means of simple and non labour-intensive method./p p num="39"3 ex, 5 dwg/p
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Temerov V.L., Sokolov A.E., Sukhachev A.L., Bovina A.F., Edel’man I.S., Malakhovskii A.V.
Заглавие : Optical properties of trigonal single crystals (Yb, Tm)Al3(BO3)4 grown from fluxes based on the Bismuth and lithium molibdates
Место публикации : Crystallography Reports. - 2008. - Vol. 53. - С. 1157
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Vasiliev A. D., Zaitsev A. I., Zamkov A. V.
Заглавие : Growth, optical and electromechanical properties of single-crystalline orthorhombic bismuth triborate
Место публикации : J. Cryst. Growth. - 2008. - Vol. 310, Is. 18. - P.4027-4030. - ISSN 0022-0248, DOI 10.1016/j.jcrysgro.2008.06.020
Примечания : Cited Reference Count: 19. - Гранты: The work was supported by the Russian Foundation for Basic Research Grant No 07-02-00497, the Grants of the President of the Russian Federation for the support of leading scientific schools (SS-4137.2006.2 and SS-6612.2006.3), the Grant RNR2.1.1.1814 and Interdisciplinary Integration project of SB RAS No 33.Финансирующая организация: Russian Foundation for Basic Research [07-02-00497]; President of the Russian Federation [SS-4137.2006.2, SS-6612.2006.3]; SB RAS [33]; [RNR2.1.1.1814]
Предметные рубрики: BORATE BIB3O6
BIBO
GENERATION
Ключевые слова (''Своб.индексиров.''): growth from melt--borates--dielectric materials--nonlinear optical materials--a2. growth from melt--b1. borates--b2. dielectric materials--b2. nonlinear optical materials--a2. growth from melt--b1. borates--b2. dielectric materials--b2. nonlinear optical materials--bismuth triborate--electro-mechanical properties--optical---single-crystalline--bismuth
Аннотация: Orthorhombic bismuth triborate (delta-BiB3O6) Single crystals were grown via the top-seeded method at atmospheric pressure. delta-BiB3O6 is shown to be a stable polymorph at temperatures close to the melting point while alpha-BiB3O6 is a metastable one. Optical, acoustic and electromechanical properties of delta-BiB3O6 are measured. Possibility of doping delta-BiB3O6 with large amounts of rare earths is demonstrated. (C) 2008 Published by Elsevier B.V.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lyubutin I. S., Ovchinnikov S. G., Gavriliuk A. G., Struzhkin V. V.
Заглавие : Spin-crossover-induced Mott transition and the other scenarios of metallization in 3d(n) metal compounds
Разночтения заглавия :авие SCOPUS: Spin-crossover-induced Mott transition and the other scenarios of metallization in 3 dn metal compounds
Место публикации : Phys. Rev. B: AMER PHYSICAL SOC, 2009. - Vol. 79, Is. 8. - Ст.85125. - ISSN 1098-0121, DOI 10.1103/PhysRevB.79.085125
Примечания : Cited References: 41
Предметные рубрики: RARE-EARTH ORTHOFERRITES
NARROW ENERGY BANDS
HIGH-PRESSURE
MAGNETIC COLLAPSE
ELECTRON CORRELATIONS
PHASE-TRANSITION
STATE
Y3FE5O12
OXIDES
EQUATION
Ключевые слова (''Своб.индексиров.''): bismuth compounds--hubbard model--localised states--metal-insulator transition--metallisation--spin systems
Аннотация: A different "Hubbard energy control" mechanism of the insulator-metal transition (IMT) in Mott-Hubbard insulators is discussed. This mechanism can be initiated by the lattice compression and it is driven by a spin crossover of 3d(5) ions from the high-spin state to the low-spin state. The spin crossover suppresses the effective Hubbard parameter U-eff down to the value enabling the insulator-metal transition according to the Mott mechanism U-eff/W approximate to 1. The classification of possible scenarios of metallization in the other 3d(n) metal compounds is also performed.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Popkov S. I., Semenov S. V., Bykov A. A., Sabitova E. I., Dubrovskiy A. A., Shaikhutdinov K. A., Petrov M. I.
Заглавие : Contributions from Inter-grain Boundaries to the Magneto-resistive Effect in Polycrystalline High-T (C) Superconductors. The Underlying Reason of Different Behavior for YBCO and BSCCO Systems
Разночтения заглавия :авие SCOPUS: Contributions from inter-grain boundaries to the magneto-resistive effect in polycrystalline high-TC superconductors. the underlying reason of different behavior for YBCO and BSCCO systems
Место публикации : J. Supercond. Nov. Magn: SPRINGER, 2011. - Vol. 24, Is. 7. - P2129-2136. - ISSN 1557-1939, DOI 10.1007/s10948-011-1166-9
Примечания : Cited References: 30. - This work is supported by program N5 of RAS, project N7.
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTORS
PHASE-SLIP
TRANSPORT-PROPERTIES
TRANSITION
FIELD
COMPOSITES
BULK
TAPES
YBA2CU3O7-DELTA
DISSIPATION
Ключевые слова (''Своб.индексиров.''): bscco--ybco--intergrain boundaries--magnetoresistance--bscco--intergrain boundaries--magnetoresistance--ybco--bscco--bscco system--comparative studies--high tc superconductors--high-field--inter-grain--irreversibility lines--magneto-resistive effect--polycrystalline--resistive transition--standard measurements--weak pinning--ybco--bismuth--electric resistance--grain boundaries--high temperature superconductors--lead--magnetic fields--magnetoelectronics--magnetoresistance--magnetos--superconductivity--yttrium barium copper oxides--semiconductor metal boundaries
Аннотация: In order to clarify the mechanisms in charge of broadening of resistive transition R(T) in magnetic fields of bismuth-based polycrystalline high-T (C) superconductor (HTSC), a comparative study of Bi1.8Pb0.3Sr1.9Ca2Cu3O (x) (BSCCO) and YBa2Cu3O7-delta (YBCO) have been performed. Magnetoresistive effects and irreversibility line obtained from magnetic measurements have been studied. It was established that (1) for YBCO, the smooth part of R(T) dependence unambiguously corresponds to dissipation in the intergrain boundaries for arbitrary magnetic fields; (2) for polycrystalline BSCCO, the smooth part of R(T) dependences correspond to dissipation within intergrain boundary subsystem in the field range H 10(2) Oe only, while standard measurements of R(T) dependences in magnetic field range H 10(2) Oe reflect the dissipation processes occurring both in intergrain boundary and HTSC grain subsystems; (3) for the high-field range, the contribution from intergrain boundaries of BSCCO can be distinguished from magnetoresistance R(H) dependences obtained at high enough current density on textured samples. It is proposed that various magneto-resistive properties of these classical HTSC systems are due comparatively weak pinning in BSCCO.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Bykov A. A., Semenov S. V., Popkov S. I., Dubrovskii A. A., Shaikhutdinov K. A., Petrov M. I.
Заглавие : General regularities of magnetoresistive effects in the polycrystalline yttrium and bismuth high-temperature superconductor systems
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2011. - Vol. 53, Is. 5. - P922-932. - ISSN 1063-7834, DOI 10.1134/S1063783411050052
Примечания : Cited References: 52. - This study was supported by the Russian Academy of Sciences within the program no. 5 (project no. 7).
Предметные рубрики: HIGH MAGNETIC-FIELDS
PHASE-SLIP
RESISTIVE TRANSITION
CU-O
TRANSPORT-PROPERTIES
JOSEPHSON MEDIUM
MIXED-STATE
FLUX-CREEP
T-C
DISSIPATION
Аннотация: The influence of thermomagnetic prehistory on the behavior of a resistive transition R(T) in external magnetic fields of polycrystalline YBa(2)Cu(3)O(7) and Bi(1.8)Pb(0.3)Sr(1.9)Ca(2)Cu(3)O (x) high-temperature supercon-ductors and the Bi(1.8)Pb(0.3)Sr(1.9)Ca(2)Cu(3)O (x) + Ag texture has been investigated. It has been found that, for YBa(2)Cu(3)O(7), the thermomagnetic prehistory exerts a substantial influence on the dissipation in the subsystem of grain boundaries in magnetic fields up to similar to 10(3) Oe, and this effect becomes insignificant in fields higher than similar to 10(4) Oe. This behavior has been explained by the influence of magnetic moments of high-temperature superconductor grains on the effective magnetic field in the intergranular medium. For bismuth high-temperature superconductors, no influence of thermomagnetic prehistory on the resistive transition has been observed; however, this effect manifests itself in current-voltage characteristics at high transport current densities. There is also a radical difference in the behavior of isotherms of the magnetoresistance R(H) for the yttrium and bismuth systems. For YBa(2)Cu(3)O(7), there is a clear separation between the dissipation regimes in the intergranular medium and in grains, which manifests itself even at low transport current densities as a change of sign in the curvature of the dependence R(H). For a texture based on the bismuth high-temperature superconductor, this feature has been observed only at high current densities (comparable to the critical current density at H = 0). This difference in the behavior of magnetoresistive properties of the classical high-temperature superconductor systems under investigation has been explained by relatively low irreversibility fields of the bismuth high-temperature superconductors. In these materials, simultaneous processes of dissipation can occur in an external magnetic field both in the subsystem of grain boundaries between crystallites and in the crystallites themselves.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Melnikova S. V., Isaenko L. I.
Заглавие : Linear optical properties of γ-modification of bismuth borate BiB3O6
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 54, Is. 10. - P.1966-1969. - ISSN 1063-7834, DOI 10.1134/S1063783412100228
Примечания : Cited References: 9. - This study was supported by the Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools of the Russian Federation (grant no. NSh-4828.2012.2) and the Siberian Branch of the Russian Academy of Science (integration project no. 28).
Предметные рубрики: GROWTH
Аннотация: The refractive index dispersion of the γ-BiB3O6 crystal in the wavelength range 0.43–0.81 μm has been measured. It has been shown that the principal refractive indices n 1, n 2, and n 3 are on average higher than those of α-BiB3O6, but are slightly lower than those of δ-BiB3O6. The temperature dependences of the rotation angle φ(T) of the optical indicatrix and birefringence Δn 2(T) = (n 1 − n 3)(T) have been studied in the temperature range 100–963 K. It has been shown that the γ-BiB3O6 crystal is stable in this temperature region.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Patrin G. S., Yakovchuk V.Yu., Velikanov D. A., Patrin K. G., Yarikov S. A.
Заглавие : Interlayer interactions in FeNi/Bi/FeNi trilayers
Место публикации : Bull. Russ. Acad. Sci.: Phys.: Allerton Press, 2012. - Vol. 76, Is. 2. - P.177-179. - ISSN 1062-8738
Примечания : Cited References: 5. - This study was supported by the Russian Foundation for Basic Research, project no. 110200675a.
Ключевые слова (''Своб.индексиров.''): giant magnetoresistance effect--interlayer interactions--spacer thickness--squid magnetometry--trilayers--magnetic resonance--bismuth
Аннотация: Interlayer interactions in FeNi/Bi/FeNi films are studied experimentally. It is established by SQUID magnetometry and magnetic resonance investigations that the interlayer interaction in these films is determined by the bismuth spacer thickness and temperature. A giant magnetoresistance effect is observed in the investigated trilayers. © 2012 Allerton Press, Inc.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ikonnikov D. A., Malakhovskii A. V., Sukhachev A. L., Zaitsev A. I., Aleksandrovsky A. S., Jubera V.
Заглавие : Spectroscopic properties of Nd3+ in orthorhombic δ-BiB3O6 crystal
Место публикации : Opt. Mater.: ELSEVIER SCIENCE BV, 2012. - Vol. 34, Is. 11. - P.1839-1842. - ISSN 0925-3467, DOI 10.1016/j.optmat.2012.05.016
Примечания : Cited References: 23. - The work was supported by Ministry of Education and Science of Russian Federation (Contract 16.740.11.0150), by Russian Foundation for Basic Researches Grant 12-02-00026, Grant of President of Russian Federation for support of leading scientific schools No. SS-4828.2012.2, Grant No. SFU.F12, and Projects No. 28, 43 and No. 101 of SB RAS.
Предметные рубрики: SPECTRAL-LINE INTENSITIES
RARE-EARTH IONS
LASER CRYSTAL
NdAl3(BO3)(4) NAB
OPTICAL-SPECTRA
BiB3O6
SYSTEMS
GROWTH
Er3+
Tm3+
Ключевые слова (''Своб.индексиров.''): neodymium--orthorhombic bismuth triborate--absorption--judd-ofelt analysis
Аннотация: Absorption spectra of the Nd3+ ions in an orthorhombic δ-BiB3O6 single crystal were measured in the spectral range 11,000-20,500 cm-1. The f-f transition intensities were analyzed in terms of the Judd-Ofelt theory, and the following parameters of the theory were obtained: Ω2 = 6.35 × 10-20 cm2, Ω4 = 4.86 × 10-20 cm 2, and Ω6 = 11.233 × 10-20 cm 2. The strengths, spontaneous emission probabilities, branching ratios, spectroscopic quality factor and excited state radiative lifetime were calculated for laser transitions from the 4F3/2 state to 4IJ manifold. Spectroscopic properties of Nd 3+:δ-BiB3O6 crystal favor lasing at 1.3 μm, where this crystal possesses near non-critical phase matching for second harmonic generation. © 2012 Elsevier B.V. All rights reserved.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Udod L. V., Sitnikov M. N., Velikanov D. A., Gorev M. V., Molokeev M. S., Galyas A. I., Yanushkevich K. I.
Заглавие : Magnetic and electrical properties of bismuth cobaltite Bi24(CoBi)O40 with charge ordering
Место публикации : Phys. Solid State. - 2012. - Vol. 54, Is. 10. - P.2005-2014. - ISSN 1063-7834, DOI 10.1134/S106378341210006X
Примечания : Cited References: 22. - This study was supported by the Russian Foundation for Basic Research (project nos. 09-02-92001-NNS_a, 12-02-00125-a, and 11-02-98004-r_sibir'_a)
Предметные рубрики: Thermoelectric-power
Co3O4
Conductivity
Transition
Аннотация: The compound Bi24(CoBi)O40 has been synthesized using the solid-phase reaction method. The temperature and field dependences of the magnetic moment in the temperature range 4 K T 300 K and the temperature dependences of the EPR line width and g-factor at temperatures 80 K T 300 K have been investigated. The electrical resistivity and thermoelectric power have been measured in the temperature range 100 K T 1000 K. The activation energy has been determined and the crossover of the thermoelectric power from the phonon mechanism to the electron mechanism with variations in the temperature has been observed. The thermal expansion coefficient of the samples has been measured in the temperature range 300 K T 1000 K and the qualitative agreement with the temperature behavior of the electrical resistivity has been achieved. The electrical and structural properties of the compound have been explained in the framework of the model of the electronic-structure transition with inclusion of the exchange and Coulomb interactions between electrons and the electron-phonon interaction.
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Patrin K. G., Yakovchuk V.Yu., Patrin G. S., Yarikov S. A.
Заглавие : Magnetism and magnetoresistance in NiFe/Bi/NiFe films
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Diffusion and Defect Data Pt.B: Solid State Phenomena. - 2012. - Vol. 190. - P.439-442. - ISBN 1012-0394, DOI 10.4028/www.scientific.net/SSP.190.439. - ISBN 9783037854365
Ключевые слова (''Своб.индексиров.''): antiferromagnetic interaction--bi spacer--hysteresis loop--interlayer coupling--magnetization--magnetoresistance--permalloy--trilayer films--antiferro-magnetic interactions--giant magnetoresistive--interlayer coupling--interlayer interactions--permalloy--spacer thickness--squid magnetometry--trilayer film--trilayers--antiferromagnetism--bismuth--giant magnetoresistance--hysteresis loops--magnetic materials--magnetic resonance--magnetization--magnetoresistance--electric resistance
Аннотация: Interlayer interactions in FeNi/Bi/FeNi trilayers have been experimentally studied. Based on the data of SQUID magnetometry and magnetic resonance investigations, it is shown that the interlayer interaction is determined by a bismuth spacer thickness and temperature. The giant magnetoresistive effect in the trilayer films has been discovered. В© (2012) Trans Tech Publications.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vasil'ev A. D., Golovnev N. N., Leshok A. A.
Заглавие : Crystal structure of hexakis-(N-methylthiourea) bismuth(III) triperchlorate
Место публикации : Russ. J. Inorg. Chem.: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 57, Is. 4. - P.525-527. - ISSN 0036-0236, DOI 10.1134/S0036023612040250
Примечания : Cited References: 12
Предметные рубрики: THIOUREAS
Аннотация: A bismuth(III) complex of N-methylthiourea (Mtu, C2H6N2S) [Bi(C2H6N2S)6](ClO4)3 has been synthesized, and its crystal structure has been determined. The structure is built of octahedral Bi(Mtu) 6 3+ cations and ClO 4 − anions. Sulfur atoms are coordinated to bismuth(III) (at axis 2) at octahedron vertices (Bi-S, 2.7670(8), 2.8142(8), and 2.8315(8) Å); angles SBiS vary from 82.26(3)° to 96.13(2)°. The presence of amino groups and oxygen atoms in the structure results in the emergence of numerous hydrogen bonds (HBs). All H atoms of amino groups are involved in HBs; one of them is bound to the sulfur atom. One of the oxygen atoms of ClO 4 − anions does not participate in HBs.
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