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Structure formation and thermomagnetic recording in 2-dimensional magnetic systems / V. V. Beloshapkin [и др.] // Fiz. Tverd. Tela. - 1991. - Vol. 33, Is. 9. - P. 2554-2560. - Cited References: 12 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
THIN-FILMS
TRANSITION

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Доп.точки доступа:
Beloshapkin, V. V.; Белошапкин, Валерий Васильевич; Berman, G. P.; Берман, Геннадий Петрович; Seredkin, V. A.; Середкин, Виталий Александрович; Tretyakov, A. G.; Третьяков, Александр Григорьевич; Frolov, G. I.; Фролов, Георгий Иванович; Tsybina, Z. B.
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Magnetic-properties and exchange interaction in disordered fexmn1-xs / G. A. Petrakovskii [et al.] // Fiz. Tverd. Tela. - 1991. - Vol. 33, Is. 2. - P. 406-415. - Cited References: 17 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
MONTE-CARLO
TRANSITION
CRXMN1-XS

WOS

Доп.точки доступа:
Petrakovskii, G. A.; Петраковский, Герман Антонович; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Loseva, G. V.; Ryabinkina, L. I.; Рябинкина, Людмила Ивановна; Yanushkevich, K. I.
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AVERYANOV, E. M.
POLARIZED LUMINESCENCE SPECTRUM OF IMPURITY LIQUID-CRYSTAL - THE DEGENERATION LIFTED AND RENEWED BY RELAXATION / E. M. AVERYANOV // Zhurnal Eksperimentalnoi Teor. Fiz. - 1993. - Vol. 103, Is. 6. - P. 2018-2038. - Cited References: 45 . - ISSN 0044-4510

РУБ Physics, Multidisciplinary
Рубрики:
RESOLVED FLUORESCENCE DEPOLARIZATION
   UNIAXIAL MOLECULAR SAMPLES
   NEMATIC ORDER PARAMETERS
   EXCITED-STATES
   SPECTROSCOPY
   MEMBRANES
   FLUOROPHORES
   ORIENTATION
   TRANSITION
   DYES
Аннотация: The general molecular-statistical approach is proposed for the analysis or the polarized luminescence spectrum for impurity molecule of an arbitrary symmetry in the nematic liquid crystal matrix. On the particular example of uniaxial molecules the influence of features of the molecular electron structure, orientational statistics, molecular dynamics, and features of the anisotropic intermolecular coupling upon the positions of maxima v(if)(t) of impurity fluorescence polarized bands J(ij)(t) is studied. For the first time it is shown that all these factors significantly affect the degree of spectrum v(ij)(t) degeneration. For t not-equal 0, relaxation of excited impurity molecule subsystem toward the orientational distribution lifts a partial degeneration of spectrum v(ij), occuring at t not-equal 0, and renews partial or total degeneration of spectrum v(ij) in the limit t = infinity. In the lack of the spectrum v(ij) degeneration for t = 0 the relaxation may restore partial degeneration for t not-equal 0 as a function of the features of electron structure of molecules. The results of work explain the familiar experimental data on the number of independent component v(ij) and relation between them, on dependence of v(ij) upon the order of matrix and impurity subsystem, on the mutual relation in the positions of impurity band polarized component in the absorption and fluorescence spectra.

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ORBITAL POLARIZATION IN METALLIC F-ELECTRON SYSTEMS / I. S. SANDALOV [et al.] // Phys. Rev. B. - 1995. - Vol. 51, Is. 20. - P. 13987-14000, DOI 10.1103/PhysRevB.51.13987. - Cited References: 28 . - ISSN 0163-1829

РУБ Physics, Condensed Matter
Рубрики:
MOTT INSULATORS
   VOLUME COLLAPSE
   CERIUM
   LOCALIZATION
   TRANSITION
   PHASES
   MODEL

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Scopus
Держатели документа:
RUSSIAN ACAD SCI,KIRENSKY INST PHYS,KRASNOYARSK 660036,RUSSIA
ИФ СО РАН
Condensed Matter Theory Group, Institute of Physics, University of Uppsala, Uppsala, Sweden
Kirensky Institute of Physics, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
SANDALOV, I. S.; Сандалов, Игорь Семёнович; HJORTSTAM, O.; JOHANSSON, B.; ERIKSSON, O.
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Pichugin, K. N.
Aharanov-Bohm oscillations of conductance in two-dimensional rings / K. N. Pichugin, A. F. Sadreev // Phys. Rev. B. - 1997. - Vol. 56, Is. 15. - P. 9662-9673, DOI 10.1103/PhysRevB.56.9662. - Cited References: 56 . - ISSN 0163-1829

РУБ Physics, Condensed Matter
Рубрики:
NORMAL-METAL RINGS
   HALF FLUX QUANTA
   MESOSCOPIC RING
   MAGNETIC-FIELD
   CIRCULAR BENDS
   EDGE STATES
   MAGNETOTRANSPORT
   TRANSPORT
   WIRES
   TRANSITION
Аннотация: Transport properties of mesoscopic rings with applied external magnetic field are considered numerically. Rings have square and circular forms and a finite aspect ratio d/L where L is the ring size and d is the width of ring arms. The type of the Aharonov-Bohm oscillations (ABO's) of the transmission substantially depends on the number of channels participating in the electron transmission. Moreover the aspect ratio and the geometrical form of the ring are important for the ABO's. In square rings with a small aspect ratio (d/L = 1/10) the transmission displays periodic ABO's in the region of applied magnetic field defined by the inequality infinity l(B) = ((h) over bar c/eB)(1/2)greater than or equal to d, while for rings with a large aspect ratio (d/L = 1/3) only the single-channel transmission has quasiperiodical ABO's. For the circular rings with small aspect ratios the quasiperiodic ABO's are observed all over the region of the applied magnetic field while for the rings with moderate aspect ratios only the multichannel transmission displays irregular ABO's. The probability current flow patterns demonstrate fine correspondence between the transmission and the vortex structure of current distributions in the rings. For single-channel transmission, electron currents are laminar. For multichannel transport, current flow patterns display a complicated convection pattern in the form of a vortex lattice. An elementary cell of the vortex lattice consists of a few vortices and antivortices and has a size of similar to d/f, where f is the number of channels of electron transmission in the ring. Application of the flux distorts the vortex lattice enormously, partially destroying it. Correspondingly the Aharonov-Bohm oscillations of the transmission become irregular.

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Держатели документа:
LV KIRENSKII INST PHYS,KRASNOYARSK 660036,RUSSIA
KRASNOYARSK STATE UNIV,ABO ACAD,INST FYZ,DEPT PHYS,KRASNOYARSK 660062,RUSSIA
ИФ СО РАН

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Пичугин, Константин Николаевич
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Gunyakov, V. A.
Investigation of the nematic-ferroelectric interface under a strong magnetic field / V. A. Gunyakov, A. M. Parshin, V. F. Shabanov // Solid State Commun. - 1998. - Vol. 105, Is. 12. - P. 761-765, DOI 10.1016/S0038-1098(97)10221-6. - Cited References: 14 . - ISSN 0038-1098

РУБ Physics, Condensed Matter
Рубрики:
ANCHORING ENERGY
   LIQUID-CRYSTAL
   WALL INTERFACE
   SURFACE
   TRANSITION
Кл.слова (ненормированные):
ferroelectrics -- liquid crystals -- surfaces and interfaces -- phase transitions -- light absorption
Аннотация: The behaviour of methoxy benzylidene butyl aniline (MBBA) nematic liquid crystal on the;cleavage surface of triglycine sulphate under a strong magnetic field has been investigated. With the saturation regime obtained for the liquid crystal cell in fields up to 100 kOe, for the first time the possibility appears to determine not only the ordinary anchoring coefficient W-2, but the effective anchoring energy W* without any fitting procedure. Considerable difference in these parameters (two orders of magnitude) disagrees with "electrical" corrections of the Rapini-Papoular approximation. This discrepancy is connected with the surface polarization caused by spontaneous ordering of longitudinal components of MBBA molecular dipoles on interface. The form of the anisotropic interaction potential for such interfaces has to take into account polar effects in near-surface layers of the liquid crystal. (C) 1998 Elsevier Science Ltd.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Parshin, A. M.; Паршин, Александр Михайлович; Shabanov, V. F.; Шабанов, Василий Филиппович; Гуняков, Владимир Алексеевич
}
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Gluck, M.
Lifetime statistics for a Bloch particle in ac and dc fields / M. . Gluck, A. R. Kolovsky, H. J. Korsch // Phys. Rev. E. - 1999. - Vol. 60, Is. 1. - P. 247-258, DOI 10.1103/PhysRevE.60.247. - Cited References: 27 . - ISSN 1063-651X

РУБ Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
DYNAMIC LOCALIZATION
   QUANTUM
   TRANSITION
   SCATTERING
   MATRICES
   SYSTEMS
   LADDER
   STATES
   ATOMS
   LIGHT
Аннотация: We study the statistics of the Wigner delay time and resonance width for a Bloch particle in ac and de fields in the regime of quantum chaos. It is shown that after appropriate rescaling the distributions of these quantities have a universal character predicted by the random matrix theory of chaotic scattering. [s1063-651X(99)09907-9].

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Держатели документа:
Univ Kaiserslautern, Fachbereich Phys, D-67653 Kaiserslautern, Germany
LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Kolovsky, A. R.; Коловский, Андрей Радиевич; Korsch, H. J.
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Transport properties of HTSC plus Ba(Pb, Met)O-3 composites as functions of the electrical and magnetic characteristics of nonsuperconducting components / M. I. Petrov [et al.] // Phys. Solid State. - 2000. - Vol. 42, Is. 5. - P. 810-815, DOI 10.1134/1.1131294. - Cited References: 27 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTORS
   CURRENT-VOLTAGE CHARACTERISTICS
   NORMAL-METAL LAYER
   WEAK LINKS
   JUNCTIONS
   SCATTERING
   BAPB1-XBIXO3
   TRANSITION
   IMPURITIES
   BREAKING
Аннотация: Composites simulating a network of weak metallic links and consisting of a classic 1-2-3 HTSC and a BaPbO3 metal oxide with incorporated Sn, Ni, and Fe impurities have been prepared. Experimental resistivity, magnetic, and Mossbauer studies of the BaPb(0.9)Met(0.1)O(3) nonsuperconducting components are presented. The transport properties of the HTSC + BaPb(0.9)Met(0.1)O(3) composites have been investigated. The superconducting properties of the composites are observed to be suppressed, both when the carrier mean free path in nonsuperconducting components with tin impurities decreases, and as a result of an additional interaction of the magnetic moments of (Fe, Ni) impurities with the spins of supercurrent carriers. The experimental temperature dependences of the composite critical current are analyzed in terms of the de Gennes theory for the superconductor-normal metal-superconductor structures. (C) 2000 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Ospishchev, S. V.; Оспищев С. В.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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Aplesnin, S. S.
Existence of massive singlet excitations in an antiferromagnetic alternating chain with S=1/2 / S. S. Aplesnin // Phys. Rev. B. - 2000. - Vol. 61, Is. 10. - P. 6780-6784, DOI 10.1103/PhysRevB.61.6780. - Cited References: 26 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
PEIERLS COMPOUND CUGEO3
SPIN SYSTEMS
TRANSITION
Аннотация: The one-dimensional Heisenberg model with alternating antiferromagnetic bond and spin-1/2 has been studied by the Monte Carlo method. The thermodynamic characteristics, spin-spin, and four spin-correlation function have been calculated. From several maxima of the correlation radius of the four spin-correlation function and sharp slopes of the dimer order parameter, a longitudinal component of the total spin square as a function of temperature and magnetic field, the existence of two mass singlet excitation branches with Delta S-z=0 and one triplet with Delta S-z=1 is suggested. Critical temperatures and fields related to singlet filled bands have been estimated. From these results low-temperature (TT-SP) properties of spin-Peierls (SP) compounds CuGeO3 and NaV2O5 have been explained.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Аплеснин, Сергей Степанович
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10.

Petrakovskii, G. A.
Magnetic susceptibility and magnetic-field behavior of CuB(2)O(4) copper metaborate / G. A. Petrakovskii, A. D. Balaev, A. M. Vorotynov // Phys. Solid State. - 2000. - Vol. 42, Is. 2. - P. 321-325, DOI 10.1134/1.1131205. - Cited References: 10 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
TRANSITION
STATE
Аннотация: An experimental study is reported regarding the temperature dependence of the magnetic susceptibility of a CuB(2)O(4) tetragonal single crystal within the 4.2-200-K range. It has been established that the magnetic susceptibility exhibits anomalies at 21 and 10 K and depends strongly on crystal orientation in the magnetic field. A study has been carried out of the field dependences of the magnetization of CuB(2)O(4) at various temperatures and crystal orientations. It is shown that for T 21 K, the crystal is in a paramagnetic state determined by Cu(2+) copper ions with an effective magnetic moment of 1.77 mu(B). Within the 10-21 K interval, the field dependence of the magnetization is typical of a weak ferromagnet with magnetic moments of the two antiferromagnetically coupled sublattices lying in the tetragonal plane of the crystal. The spontaneous weakly-ferromagnetic moment is 0.56 emu/g at 10 K. The canting angle of the sublattice magnetic moments, determined by the Dzyaloshinski-Moriya interaction, is 0.49 degrees. It is believed that below 10 K, the CuB(2)O(4) crystal retains its easy-plane magnetic structure, but with a zero spontaneous magnetic moment. (C) 2000 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, Kirenskii Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Balaev, A. D.; Балаев, Александр Дмитриевич; Vorotynov, A. M.; Воротынов, Александр Михайлович; Петраковский, Герман Антонович
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