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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zakharov A. I., Epov M. I., Mironov V. L., Chymitdorzhiev T. N., Seleznev V. S., Emanov A. F., Bykov M. E., Cherepenin V. A.
Заглавие : Earth surface subsidence in the kuznetsk coal basin caused by manmade and natural seismic activity according to ALOS PALSAR interferometry
Место публикации : IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.: IEEE-Institute Electrical and Electronics Engineers, 2013. - Vol. 6, Is. 3. - P.1578-1583. - ISSN 1939-1404, DOI 10.1109/JSTARS.2013.2259220
Примечания : Cited References: 14
Предметные рубрики: RADAR INTERFEROMETRY
DEFORMATION
DINSAR
INSAR
Ключевые слова (''Своб.индексиров.''): coal mine--land surface subsidence--seismic measurements--spaceborne radar interferometry
Аннотация: This paper presents results of a spaceborne radar interferometry technique application for land subsidence observations in a coal mining area in Kuzbass, Russia. Joint analysis of radar interferometry measurements with simultaneous seismic observations shows that the land subsidence is triggered by seismic events, both natural and caused by human underground activity. Surface displacements are linked typically to the boundaries of block structures and correlate with the location of clusters of seismic events.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Atuchin V. V., Molokeev M. S., Yurkin G. Yu., Gavrilova T. A., Kesler V. G., Laptash N. M., Flerov I. N., Patrin G. S.
Заглавие : Synthesis, structural, magnetic, and electronic properties of cubic CsMnMoO3F3 oxyfluoride
Место публикации : J. Phys. Chem. C: American Chemical Society, 2012. - Vol. 116, Is. 18. - P.10162-10170. - ISSN 1932-7447, DOI 10.1021/jp302020f
Примечания : Cited References: 64. - We thank Dr. A.M. Ziatdinov for the electron paramagnetic resonance measurements. This study was partly supported by SB RAS (Grant 28).
Предметные рубрики: RAY PHOTOELECTRON-SPECTROSCOPY
PHASE-TRANSITIONS
CORE LEVELS
SURFACE CHARACTERIZATION
CRYSTAL-STRUCTURE
CLEAVED SURFACE
MIXED-VALENCE
OXIDES
MN
MOLYBDENUM
Chemical bondings
Cubic phase
Energy differences
Heat capacity measurements
Oxyfluorides
Powder samples
Solid-state synthesis
Space Groups
Temperature range
Valence electron
Binding energy
Chemical bonds
Electronic structure
Fluorine compounds
Magnetic properties
Metal ions
Photoelectrons
Rietveld method
X ray photoelectron spectroscopy
Electronic properties
Аннотация: A powder sample of CsMnMoO3F3 oxyfluoride has been prepared by solid state synthesis. The pyrochlore-related crystal structure of CsMnMoO3F3 has been refined by the Rietveld method at T = 298 K (space group Fd-3m, a = 10.59141(4) angstrom, V = 1188.123(8) angstrom(3); R-B = 3.44%). The stability of the cubic phase has been obtained over the temperature range T = 110-293 K by heat capacity measurements. Magnetic properties have been measured over the range of T = 2-300 K. The electronic structure of CsMnMoO3F3 has been evaluated by X-ray photoelectron spectroscopy. Chemical bonding effects have been discussed for all metal ions using binding energy difference parameters and wide comparison with related oxides and fluorides. The competition between O-2(-) and F- ions for metal valence electrons has been found.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Фомин, Сергей Викторович, Каравайский, Андрей Юрьевич
Заглавие : Восстановление засоленности влажных почв с использованием диэлектрических измерений в диапазоне частот от 0,2 до 14,8 ГГц
Коллективы : "Решетневские чтения", международная научная конференция (16; 2012 ; нояб. ; 7-9; Красноярск)
Место публикации : Решетневские чтения: матер. XVI Междунар. науч. конф. : в 2 ч. - Красноярск, 2012. - Ч. 1. - С. 223-224. - ISBN 1990-7702
Аннотация: Предложена методика восстановления засоленности естественных почв из их диэлектрических спектров. Методика основывается на недавно предложенной многорелаксационной обобщенной рефракционной диэлектрической модели для частотных спектров влажных почв (ОРДМВП). Точность восстановления засоленности влажных почв оценивается по статистической погрешности расчетов восстанавливаемых спектров комплексной диэлектрической проницаемости через коэффициент Пирсона r и стандартное отклонение s.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krylov A. S., Sofronova S. N., Kolesnikova E. M., Vtyurin A. N., Isaenko L. I.
Заглавие : Lattice dynamics of oxyfluoride Rb2KMoO3F3
Коллективы : International Symposium on Ferroic Domains and Micro- to Nanoscopic Structures, Russia/CIS/Baltic/Japan Symposium on Ferroelectricity
Место публикации : Ferroelectrics: Taylor & Francis LTD, 2012. - Vol. 441. - P.52-60. - ISSN 0015-0193, DOI 10.1080/00150193.2012.743791
Примечания : Cited References: 23
Предметные рубрики: PHASE-TRANSITIONS
RAMAN-SCATTERING
ELPASOLITE
CRYSTALS
DISORDER
SPECTRA
CS
Ключевые слова (''Своб.индексиров.''): oxyfluorides--lattice dynamics--ramam measurements
Аннотация: The complete Raman spectra of oxyfluoride Rb2KMoO 3F3 were obtained. At T ≈ 185 K phase transitions were found. Lattice dynamics of disordered structures of the investigated compound was simulated, and "soft" vibrational modes were found in the calculated spectrum. Copyright © Taylor & Francis Group, LLC.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ritter C., Pankrats A. I., Gudim I. A., Vorotynov A. M.
Заглавие : Magnetic structure of iron borate DyFe3(BO3)4: A neutron diffraction study
Коллективы : European Conference on Neutron Scattering
Место публикации : J. Phys.: Conf. Ser.: IOP Publishing Ltd, 2012. - Vol. 340. - Ст.012065. - ISSN 1742-6588, DOI 10.1088/1742-6596/340/1/012065
Примечания : Cited References: 22
Ключевые слова (''Своб.индексиров.''): antiferromagnetics--crystallographic structure--easy-axis anisotropy--iron borate--kramers doublet--low temperatures--magnetic propagation--neutron diffraction measurements--repopulation--room temperature--spin reorientation--sub-lattices--thermal dependences--unit cells
Аннотация: Neutron diffraction measurements were performed on the iron borate DyFe3(BO3)4 to investigate details of the crystallographic structure, the low temperature magnetic structure and its magnetic properties. DyFe3(BO3)4 adopts at room temperature the P3121 symmetry and becomes antiferromagnetic below TN = 39 K. Both, the rare earth and the iron sublattice, follow the same magnetic propagation vector τ = [0, 0, ½] which leads to a doubling of the crystallographic unit cell in the c-direction. The easy axis anisotropy of the rare earth determines the moment orientation to be mainly along c. No spin reorientation is found between TN and 1.5 K, however, a small anomaly in the thermal dependence of the unit cell a-parameter is found at about 27 K which could be connected to repopulation of low lying Kramers doublets of Dy3+. The magnetic moment value of the Fe-moment is at 1.5 K with μFe = 4.5 μB only slightly smaller than expected for an S = 5/2 ion while the Dy moment is strongly reduced and amounts only to μDy = 6.4 μB.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Drokina T. V., Petrakovskii G. A., Velikanov D. A., Molokeev M. S.
Заглавие : X-ray and magnetic measurements of TmFeTi2O7
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : Solid State Phenom.: Selected, peer reviewed papers/ ed.: S. G. Ovchinnikov, A. Samardak: Trans Tech Publications, 2014. - Vol. 215: Trends in Magnetism: Nanomagnetism (EASTMAG-2013). - P.470-473. - ISSN 978-303835054-5, DOI 10.4028/www.scientific.net/SSP.215.470. - ISSN 1662-9779
Примечания : Cited References: 8
Ключевые слова (''Своб.индексиров.''): crystal structures--magnetic properties--spin glass state--zirconolite
Аннотация: In this paper we are reported about a peculiarity of the crystal structure and the magnetic state of TmFeTi2O7. The compound TmFeTi2O7 has been synthesized by the solid-phase reaction method. Using X-ray diffraction method the disorder in the distribution of the iron ions over five nonequivalent crystal sites was observed, also the populations of the iron atoms positions were determined. We show that below Tf = 6 K the magnetization of TmFeTi2O7 depends on the magnetic history of the sample. There are indications for spin glass state. This results allow us to assume the state of spin glass is realized below freezing temperature Tf = 6 K in TmFeTi2O7. © (2014) Trans Tech Publications, Switzerland.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Plotkin V. V., Dyad'kov P. G., Ovchinnikov S. G.
Заглавие : Detecting a magnesiowustite phase transition in the lower mantle by inversion of geomagnetic data
Коллективы : Siberian Branch of the Russian Academy of Sciences [96]
Место публикации : Russ. Geol. Geophys.: Elsevier Science, 2014. - Vol. 55, Is. 9. - P.1138-1145. - ISSN 1068-7971, DOI 10.1016/j.rgg.2014.08.009. - ISSN 1878-030X
Примечания : Cited References: 26. - The study was supported by the Siberian Branch of the Russian Academy of Sciences (interdisciplinary integration project no. 96).
Предметные рубрики: ELECTRICAL-CONDUCTIVITY
SATELLITE MEASUREMENTS
EARTHS MANTLE
GLOBAL MVS
INDUCTION
FIELD
METALLIZATION
Ключевые слова (''Своб.индексиров.''): magnesiowustite--metallic state--phase transition--lower mantle--conductivity--geomagnetic variations--global network
Аннотация: Global geomagnetic data are inverted for detecting a high-conductivity layer at depths of 1500-2000 km to test the hypothesis of a magnesiowustite phase transition in the lower mantle. We present the results of processing of both synthetic and global data-average monthly values of the geomagnetic field from 1920 to 2009. The inverted global data are consistent with the possible existence of a high-conductivity layer at great depths in the lower mantle.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Troyanchuk I. O., Bushinsky M. V., Sikolenko V., Efimov V., Volkov N. V., Tobbens D. M., Ritter C., Raveau B.
Заглавие : Ferromagnetism in single-valent manganites
Место публикации : J. Alloys Compd.: Elsevier Science, 2015. - Vol. 619. - P.719-725. - ISSN 0925-8388, DOI 10.1016/j.jallcom.2014.08.236. - ISSN 1873-4669
Примечания : Cited References: 46. - The authors would like to thank J.B. Goodenough for the fruitful discussion. This work has been supported by Belarusian Republican Foundation for Fundamental Research (Grant F14R-040).
Предметные рубрики: PHASE-SEPARATION
DOPED MANGANITES
DOUBLE EXCHANGE
DIFFRACTION
OXIDES
NMR
Ключевые слова (''Своб.индексиров.''): magnetically ordered materials--solid state reactions--exchange and superexchange--magnetic measurements--neutron diffraction
Аннотация: Structural and magnetization measurements have been performed on the La0.7Sr0.3Mn0.85 Nb 0.15 - x 5 + Mg x 2 + O3 stoichiometric compounds. With rise of the Mg2+ content the formal oxidation state manganese increases from +3 ( x = 0 ) up to +3.55 ( x = 0.15 ) . The compositions with 0 ⩽ x ≤ 0.08 undergo a structural transition from rhombohedral to orthorhombic symmetry below room temperature whereas x = 0.1 and x = 0.15 compounds are rhombohedral down to 2 K. The structural parameters evidence that the orthorhombic phase is not long-range orbitally ordered and that the structural transition is associated with a steric effect. The Mg-free compound is ferromagnetic with the Curie point of around 150 K and a magnetic moment of 3.1 μ B /Mn. The substitution of Nb5+ with Mg2+ leads to a gradual weakening of the ferromagnetic component while in the x = 0.15 compound A-type antiferromagnetic short-range order is stabilized in spite of macroscopic R 3 ¯ c symmetry. All the compositions show insulating behavior. It is suggested that ferromagnetism is originated from superexchange interactions via oxygen. Covalence enhances the positive part of the superexchange interactions whereas structural disorder induced by Nb5+ and Mg2+ ions leads to suppression of ferromagnetism.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Melnikova S. V., Kokov I. T.
Заглавие : Phase-transitions in CS2CDI4 from measurements of birefringence and dielectric-properties
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1987. - Vol. 29, Is. 8. - P.2487-2490. - ISSN 0367-3294
Примечания : Cited References: 8
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gorev M. V., Bondarev V. S., Aleksandrov K. S.
Заглавие : Heat capacity study of PMN near fieldinduced phase transition
Коллективы : International Seminar on Ferroelactic Physics
Место публикации : Ferroelectrics. - 2007. - Vol. 360, Is. 1, Pt. 2. - P.37-43. - ISSN 0015-0193, DOI 10.1080/00150190701515964
Примечания : Cited References: 11
Ключевые слова (''Своб.индексиров.''): field-induced phase transition--heat capacity--pmn--field cooling--field model--field-induced phase transition--heat capacities--heat capacity measurements--single crystal wafers--temperature range--zero-field heating--electric fields--single crystals--specific heat--phase transitions
Аннотация: Heat capacity measurements were performed for a single crystal wafer of PMN in the temperature range of 170-250 K applying an electric field E = 3.0 kV/cm along the [111] direction. The heat capacity anomalies related to the phase transition at Tc = 210 K upon zero field heating after field cooling and at Tc = 223 K upon field cooling have been found. The results obtained are discussed together with the data of previous studies in the frame of the spherical random bondrandom field model.
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