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Peculiarity of interrelation between electronic and magnetic properties of HTSC cuprates associated with short-range antiferromagnetic order / S. G. Ovchinnikov [et al.] // J. Exp. Theor. Phys. - 2010. - Vol. 111, Is. 1. - P. 104-113, DOI 10.1134/S1063776110070101. - Cited References: 48. - This study was financially supported by the Russian Foundation for Basic Research (project nos. 09-02-01224 and 09-02-00127) and under the program "Quantum Physics of Condensed Media" of the Presidium of the Russian Academy of Sciences (project no. 5.7). . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
T-J MODEL
   NORMAL-STATE
   FERMI-SURFACE
   RESISTIVITY ANISOTROPY
   3-CENTER INTERACTIONS
   OPTICAL CONDUCTIVITY
   COPPER OXIDES
   CUO2 PLANES
   SUPERCONDUCTORS
   TRANSPORT
Кл.слова (ненормированные):
Anisotropic resistivity -- Antiferromagnetic orders -- Concentration dependence -- Cuprates -- Doping levels -- Electronic and magnetic properties -- Fermi surface topology -- High temperature superconducting -- Magnetic orders -- Magnetic state -- Maximum values -- Pseudo-gap -- Short-range magnetic orders -- Strong electron correlations -- Temperature dependence -- Anisotropy -- Antiferromagnetic materials -- Antiferromagnetism -- Copper compounds -- Correlators -- Electronic properties -- High temperature superconductors -- Hole concentration -- Magnetic properties -- Neon -- Superconducting magnets -- Single crystals
Аннотация: We report on the results of measurements of anisotropic resistivity of RBa(2)Cu(3)O(6 + x) (R = Tm, Lu) high-temperature superconducting single crystals in a wide range of doping levels, indicating a nontrivial effect of magnetic order on the electronic properties of cuprates. In particular, our results visually demonstrate the crossover from the state with moderate anisotropy of resistivity rho (c) /rho (ab) similar to 30 to a strongly anisotropic state with rho (c) /rho (ab) similar to 7 x 10(3) upon cooling as well as upon a decrease in the hole concentration in the CuO(2) planes. It is also shown that anisotropy is sensitive to the magnetic state of CuO(2) planes and attains its maximum value after the establishment of the long-range antiferromagnetic order. The results are discussed in the framework of the theory based on the t-t'-taEuro(3)-J model of CuO(2) layers taking into account strong electron correlations and short-range magnetic order. In this theory, anomalies of spin correlators and Fermi surface topology for a critical hole concentration of p* a parts per thousand 0.24 are demonstrated. The concentration dependence of the charge carrier energy indicates partial suppression of energy due to the emergence of a pseudogap at p < p*. This theory explains both the experimentally observed sensitivity of anisotropy in conductivity to the establishment of the antiferromagnetic order and the absence of anomalies in the temperature dependence of resistivity rho (ab) (T) in the vicinity of the N,el temperature.

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Публикация на русском языке Особенность взаимосвязи электронных и магнитных свойств ВТСП-купратов, обусловленная ближним антиферромагнитным порядком [Текст] / С. Г. Овчинников [и др.] // Журн. эксперим. и теор. физ. - 2010. - Т. 138 Вып. 1.- P.115-125

Держатели документа:
[Ovchinnikov, S. G.
Korshunov, M. M.] Russian Acad Sci, Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Korshunov, M. M.] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
[Kozeeva, L. P.
Lavrov, A. N.] Russian Acad Sci, Nikolaev Inst Inorgan Chem, Siberian Branch, Novosibirsk 630090, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Department of Physics, University of Florida, Gainesville, FL 32611, United States
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russian Federation

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Korshunov, M. M.; Коршунов, Максим Михайлович; Kozeeva, L. P.; Lavrov, A. N.; Лавров, Александр Николаевич
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The magnetoelastic effect in CoxMn1-xS solid solutions / S. S. Aplesnin [et al.] // Solid State Commun. - 2010. - Vol. 150, Is. 13-14. - P. 564-567, DOI 10.1016/j.ssc.2010.01.009. - Cited References: 13. - This work was supported by the Russian Foundation for Basic Research projects no. 08-02-00364-a, no. 08-02-90031, no. F08037, F08-229, and no. 09-02-00554-a. . - ISSN 0038-1098

РУБ Physics, Condensed Matter
Рубрики:
YVO3 SINGLE-CRYSTAL
   SPIN-STATE
   TRANSITION
   TRANSPORT
   PHYSICS
   LACOO3
Кл.слова (ненормированные):
Semiconductors -- X-ray scattering -- Galvanomagnetic effects -- Thermal expansion -- Semiconductors -- X-ray scattering -- Galvanomagnetic effects -- Thermal expansion -- Semiconductors -- X-ray scattering -- Coefficient of thermal expansion -- Magnetoelastic effects -- Orbital ordering -- Temperature hysteresis -- Temperature range -- Zero magnetic fields -- Crystallization -- Electric resistance -- Magnetic field effects -- Magnetoresistance -- Manganese -- Manganese compounds -- Neon -- Organic polymers -- Scattering -- Semiconductor quantum dots -- Solid solutions -- Solidification -- Thermal stress -- X ray scattering -- Thermal expansion
Аннотация: The magnetization of cation-substituted CoxMn(1-x)S sulfides upon cooling in zero magnetic field and in a field in the temperature range 4-300 K has been measured and the resistance versus magnetic field (up to 10 kOe) dependences have been obtained. Magnetoresistance and temperature hysteresis of magnetization versus prehistory are found at the magnetic field H < 0.1 T and at T < 240 K. The interrelation between the magnetic and elastic subsystems of the CoxMn1-xS solid solutions has been established. A jump in the coefficient of thermal expansion is observed at the Neel temperature. The features of the physical properties are explained by orbital ordering. (C) 2010 Elsevier Ltd. All rights reserved.

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Держатели документа:
[Aplesnin, S. S.
Ryabinkina, L. I.
Romanova, O. B.
Har'kov, A. M.] MF Reshetneva Aircosm Siberian State Univ, Krasnoyarsk 660014, Russia
[Gorev, M. V.
Balaev, A. D.
Eremin, E. V.
Bovina, A. F.] Russian Acad Sci, KSC Siberian Branch, Ctr Shared, Krasnoyarsk 660036, Russia
КНЦ СО РАН
M.F. Reshetneva Aircosmic Siberian State University, Krasnoyarsk, 660014, Russian Federation
Center of shared using KSC Siberian branch, Russian Academy Science, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Ryabinkina, L. I.; Рябинкина, Людмила Ивановна; Romanova, O. B.; Романова, Оксана Борисовна; Har'kov, A. M.; Gorev, M. V.; Горев, Михаил Васильевич; Balaev, A. D.; Балаев, Александр Дмитриевич; Eremin, E. V.; Еремин, Евгений Владимирович; Bovina, A. F.; Бовина, Ася Федоровна
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Breaking of the Selection Rules for Optical Transitions in the Dielectric PrFe3(BO3)(4) Crystal by a Praseodymium-Iron Exchange Interaction / M. N. Popova [et al.] // Phys. Rev. Lett. - 2009. - Vol. 102, Is. 18. - Ст. 187403, DOI 10.1103/PhysRevLett.102.187403. - Cited References: 26. - This work was supported in part by the RFBR under Grants No. 07-02-01185 and No. 07-02-00704 and by the Russian Academy of Sciences under the Programs for Basic Research. . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
Рубрики:
SINGLE-CRYSTAL
   GDFE3(BO3)(4)
   PHASE
   DYFE3(BO3)(4)
   SPECTRUM
   LINES
Кл.слова (ненормированные):
Magnetic ordering temperatures -- Optical spectrum -- Order parameters -- Point symmetries -- Selection rules -- Exchange interactions -- Neon -- Praseodymium -- Single crystals -- Crystal symmetry
Аннотация: We report on the emergence of new lines in the optical spectrum of the PrFe3(BO3)(4) single crystal at the magnetic ordering temperature. The transitions between singlet crystal-field sublevels of Pr3+ ion with the same transformational properties, strictly forbidden for the trigonal D-3 point symmetry of this ion in PrFe3(BO3)(4), appear below the Neel temperature and grow in intensity as a square of the order parameter. We show that the phenomenon originates from the mixing of wave functions of different Pr3+ sublevels by the Pr-Fe exchange interaction.

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Держатели документа:
[Popova, M. N.
Stanislavchuk, T. N.] Russian Acad Sci, Inst Spect, Troitsk 142190, Moscow Region, Russia
[Malkin, B. Z.] Kazan VI Lenin State Univ, Kazan 420008, Russia
[Bezmaternykh, L. N.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Institute of Spectroscopy, Russian Academy of Sciences, 142190 Troitsk, Moscow region, Russian Federation
Kazan State University, 420008 Kazan, Russian Federation
L.V. Kirensky Institute of Physics, Siberian Branch, RAS, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Popova, M. N.; Stanislavchuk, T. N.; Malkin, B. Z.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; RFBR [07-02-01185, 07-02-00704]; Russian Academy of Sciences
}
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Optical anisotropy of uniaxially oriented films of polymer-encapsulated liquid crystals / V. G. Nazarov [et al.] // J. Opt. Technol. - 2005. - Vol. 72, Is. 9. - P. 675-677, DOI 10.1364/JOT.72.000675. - Cited Reference Count: 13 . - SEP. - ISSN 1070-9762
Кл.слова (ненормированные):
Dichroic dyes -- Laser radiation -- Optical anisotropy -- Uniaxially oriented films -- Anisotropy -- Density (optical) -- Dyes -- Helium neon lasers -- Light polarization -- Light scattering -- Light transmission -- Liquid crystal polymers -- Optical films
Аннотация: Uniaxially oriented films of polymer-encapsulated liquid crystals (PELCs) possess strong light-scattering anisotropy. The macroscopic transmittance anisotropy in uniaxially oriented PELC films can be strengthened by adding dichroic dyes to the LC drops. The ratio T-perpendicular to/T-parallel to of the principal components of the optical transmittance polarized perpendicular and parallel to the orientation of the PELCs, respectively, has been measured for He-Ne laser radiation transmitted through uniaxially oriented samples. The experiments showed that the transmittance anisotropy T-perpendicular to/T-parallel to for samples doped with dye is greater than the anisotropy caused only by light scattering. (c) 2005 Optical Society of America.

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Оригинал на русском языке

Держатели документа:
Krasnoyarsk State Technical University, Krasnoyarsk, Russian Federation
L V. Kirenskii Institute of Physics, Siberian Section, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Nazarov, V. G.; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Parshin, A. M.; Паршин, Александр Михайлович; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович; International Seminar on Display Optics(1 ; OCT 18-20, 2004 ; St Petersburg, RUSSIA)
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