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Aplesnin, S. S.
Anomalies in magnetoresistance and in the bulk modulus for ferromagnetics with four-spin exchange interaction on the Kondo lattice / S. S. Aplesnin, N. I. Piskunova // J. Phys.: Condens. Matter. - 2006. - Vol. 18, Is. 29. - P. 6859-6868, DOI 10.1088/0953-8984/18/29/023. - Cited References: 29 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
MIXED-VALENCE MANGANITES
   PHASE-SEPARATION
   LA1-XSRXMNO3
   BEHAVIOR
   PECULIARITIES
   TRANSITION
Кл.слова (ненормированные):
Elastic moduli -- Electric resistance -- Ferromagnetism -- Function evaluation -- Paramagnetism -- Transceivers -- Adiabatic approximation -- Kondo lattice -- Paramagnetic state -- Ring exchange -- Magnetoresistance
Аннотация: The temperature dependence of resistivity and the bulk modulus are calculated on the Kondo lattice, with ring exchange between localized spins, using the spin-polaron and adiabatic approximation. Peak and zero values of the bulk modulus as functions of temperature and concentration are determined below the temperature of the transition to the paramagnetic state. The effects of the nearest order between transverse spin components and a value of the ring exchange between localized spins on magnetoresistivity are estimated.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
MF Reshetneva Aircosm Siberian State Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
L v Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
M F Reshetneva Aircosmic Siberian State University, Krasnoyarsk, 660014, Russian Federation

Доп.точки доступа:
Piskunova, N. I.; Аплеснин, Сергей Степанович
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Aver'yanov, E. M.
Correlation of the molecular structure of discotic nematic liquid crystals with their orientational order and specific features of the nematic-isotropic phase transition / E. M. Aver'yanov // Phys. Solid State. - 2004. - Vol. 46, Is. 8. - P. 1554-1559, DOI 10.1134/1.1788794. - Cited References: 32 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
MONTE-CARLO
   ANISOTROPIC SYSTEMS
   COMPUTER-SIMULATION
   BEHAVIOR
   TRIPHENYLENE
   DISCOGEN
   MESOGEN
   FIELD
Аннотация: The orientational order parameter S of molecules in high-temperature discotic nematic liquid-crystal phases of triphenylene derivatives is investigated as a function of the length of side flexible molecular chains at different temperatures. It is established that the orientational order parameters S in the range of the transition from the nematic phase to the isotropic liquid phase (the N-D-I transition) are smaller than those predicted from the molecular-statistical theory and computer simulation. It is shown that the N-D-I transition is close to both the isolated Landau point and the tricritical point (regardless of the chemical structure of the molecules and the anisotropy of dispersion intermolecular interactions). Consistent explanations are offered for a number of experimental findings, such as the anomalously small changes in the enthalpy and entropy upon the N-D-I transition (as compared to those revealed upon the N-I transition in calamitic nematic liquid crystals), the anomalously strong response of the isotropic phase of discotic nematic liquid crystals to external fields (thermodynamically conjugate to the order parameter S) and the long relaxation times of this response, and the formation of cybotactic discotic molecular clusters in the isotropic phase in the vicinity of the N-D-I transition. (C) 2004 MAIK "Nauka / Interperiodica".

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

Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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Aver'yanov, E. M.
New features of a smectic-A-crystal-B phase transition in a homologous series of liquid crystals / E. M. Aver'yanov // JETP Letters. - 2014. - Vol. 99, Is. 3. - P. 158-163, DOI 10.1134/S0021364014030047. - Cited References: 21 . - ISSN 0021-3640. - ISSN 1090-6487

РУБ Physics, Multidisciplinary
Рубрики:
POLARIZABILITY
   POLYMORPHISM
   ANISOTROPY
   MOLECULES
   BEHAVIOR
Аннотация: The components L j of the Lorentz tensor and the polarizability density of molecules G in the smectic-A and crystalline-B phases have been determined for homologues of the series of alkyl-p-(4-alkoxybenzylideneamino-)cinnamates. The quantity L j (G) in both phases is a linear (quadratic) function of the orientational order parameter of molecules S, which is invariant (noninvariant) with respect to the A-B transition, which is manifested in the form of jumps δL j and δG and enhancement of the G(S) dependence. An increase in the length of terminal molecular chains and weakening of interlayer correlation of molecules are accompanied by strengthening of the A-B transition of the first order and G(S) dependences in both phases together with an increase in δL j and δG. Change δG and dependence G(S) in the B phase are related to change in the conformation (flattening) of aromatic molecular cores.

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Публикация на русском языке Аверьянов, Евгений Михайлович. Новые особенности фазового перехода смектик-A-кристалл-B в гомологическом ряду жидких кристаллов [Текст] / Е. М. Аверьянов // Письма в Журн. эксперим. и теор. физ. : Наука, 2014. - Т. 99 Вып. 3-4. - С. 179-184

Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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Balaev, D. A.
Correlation between magnetoresistance and magnetization hysteresis in a granular high-T C superconductor: Impact of flux compression in the intergrain medium / D. A. Balaev, S. V. Semenov, M. I. Petrov // J. Supercond. Nov. Magn. - 2014. - Vol. 27, Is. 6. - P. 1425-1429, DOI 10.1007/s10948-014-2491-6. - Cited References: 27 . - ISSN 1557-1939. - ISSN 1557-1947

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTOR
   JOSEPHSON MEDIUM
   CRITICAL-STATE
   YBA2CU3O7-DELTA
   FIELDS
   BEHAVIOR
   HTSC
   COMPOSITES
   RESISTANCE
   MOTION
Кл.слова (ненормированные):
Granular superconductor -- Josephson medium -- Effective field -- Magnetoresistance -- Magnetization hysteresis
Аннотация: The correlation between experimental magnetic field dependences of magnetoresistance and magnetization hysteresis in granular YBa2Cu3O7 is established. Within the proposed approach, magnetoresistance is assumed to be determined by the effective field in the intergrain boundaries the ensemble of which is considered to be a Josephson medium. The effective field in the intergrain medium can be written in the form B (eff)(H)=H-4 pi M(H)x alpha, where alpha is the parameter of averaged demagnetizing factors of grains and the degree of flux compression. A comparison of experimental magnetoresistance R(H) and magnetization M(H) hysteresis dependences obtained at different external magnetic field sweep rates yields the value alpha similar to 10, which is caused by the flux compression between grains. The proposed model describes well most of the features of the magnetoresistance hysteresis in granular high-T (C) superconductors.

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Доп.точки доступа:
Semenov, S. V.; Семёнов, Сергей Васильевич; Petrov, M. I.; Петров, Михаил Иванович; Балаев, Дмитрий Александрович
}
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Berman, G. P.
Quantum chaos in interactions of multilevel quantum-systems with a coherent radiation-field / G. P. Berman, A. R. Kolovskii // Uspekhi Fiz. Nauk. - 1992. - Vol. 162, Is. 4. - P. 95-141. - Cited References: 36 . - ISSN 0042-1294

РУБ Physics, Multidisciplinary
Рубрики:
QUASIENERGY FUNCTIONS
   RESONANCES
   BEHAVIOR
   OVERLAP
Аннотация: The paper is short review of the papers devoted to the dynamics of the multilevel quantum systems affected by the external periodic field. The main attention is paid to the phenomenon of the quantum nonlinear resonance and the interaction of the two quantum nonlinear resonances, when the dynamics of the system is chaotic in the classical limit. The paper also contains the analysis of some physical systems where these phenomena take place. 30 figs. 37 refs.

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Доп.точки доступа:
Kolovskii, A. R.; Коловский, Андрей Радиевич; Берман, Геннадий Петрович
}
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Bulgakov, E. N.
Propagating Bloch bound states with orbital angular momentum above the light line in the array of dielectric spheres / E. N. Bulgakov, A. F. Sadreev // J. Opt. Soc. Am. A. - 2017. - Vol. 34, Is. 6. - P. 949-952, DOI 10.1364/JOSAA.34.000949. - Cited References:37. - Ministry of Education and Science of the Russian Federation (Minobrnauka) (N 3.1845.2017); Russian Foundation for Basic Research (RFBR) (16-02-00314). . - ISSN 1084-7529. - ISSN 1520-8532

РУБ Optics
Рубрики:
GUIDED-WAVES
   CONTINUUM
   BEHAVIOR
   GRATINGS
Аннотация: We present propagating Bloch bound states in the radiation continuum with orbital angular momentum in an infinite linear periodical array of dielectric spheres. The bound states in the continuum demonstrate a giant Poynting vector spiraling around the array. They can be excited by a plane wave with incident linear polarization with a small tilt relative to the axis of the array.

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Держатели документа:
RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia.
Siberian State Aerosp Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Ministry of Education and Science of the Russian Federation (Minobrnauka) [N 3.1845.2017]; Russian Foundation for Basic Research (RFBR) [16-02-00314]
}
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Caloric characteristics of PbTiO3 in the temperature range of the ferroelectric phase transition / E. A. Mikhaleva [et al.] // Phys. Solid State. - 2012. - Vol. 54, Is. 9. - P. 1832-1840, DOI 10.1134/S1063783412090181. - Cited References: 31. - This study was supported by the Russian Foundation for Basic Research (project no. 12-08-00079) and 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). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
SINGLE-CRYSTALS
   LEAD TITANATE
   DIELECTRIC PROPERTIES
   SOLID-SOLUTIONS
   PRESSURE
   PEROVSKITES
   DEPENDENCE
   BEHAVIOR
   HEAT
Аннотация: The heat capacity and thermal expansion of the PbTiO3 ceramic sample have been measured in the temperature range 80–970 K. The electrocaloric and barocaloric efficiencies of lead titanate in the ferroelectric phase transition range have been investigated by analyzing the experimental data in terms of the thermodynamic theory of phase transitions, the electrical equation of state P(T, E), the Pippard equation, and the S(T, p) diagram.

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Публикация на русском языке Калорические характеристики PbTiO3 в области сегнетоэлектрического фазового перехода [Текст] / Е. А. Михалева [и др.] // Физ. тверд. тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54 Вып. 9. - С. 1719-1726

Держатели документа:
[Mikhaleva, E. A.
Flerov, I. N.
Gorev, M. V.] Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660074, Russia
[Mikhaleva, E. A.
Flerov, I. N.
Gorev, M. V.
Molokeev, M. S.
Cherepakhin, A. V.
Kartashev, A. V.
Mikhashenok, N. V.
Sablina, K. A.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Mikhaleva, E. A.; Михалева, Екатерина Андреевна; Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Cherepakhin, A. V.; Черепахин, Александр Владимирович; Kartashev, A. V.; Карташев, Андрей Васильевич; Mikhashenok, N. V.; Михашенок, Наталья Владимировна; Sablina, K. A.; Саблина, Клара Александровна
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Determination of the magnetic structure of SmFe3(BO3)4 by neutron diffraction: comparison with other RFe3(BO3)4 iron borates / C. Ritter [et al.] // J. Phys.: Condens. Matter. - 2012. - Vol. 24, Is. 38. - Ст. 386002, DOI 10.1088/0953-8984/24/38/386002. - Cited References: 40. - This work was supported by RFBR, grant No. 10-02-00765. . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
SPIN REORIENTATION
   EARTH
   GDFE3(BO3)4
   BEHAVIOR
Аннотация: Temperature dependent neutron diffraction studies were performed on SmFe3(BO3)4. The crystallographic structure was determined to stay as R32 over the whole studied temperature range of 2 K ‹ T ‹ 300 K. A magnetic phase transition characterized by the magnetic propagation vector κ = [0 0 3/2] takes place at TN = 34 K. The magnetic structure sees an easy-plane arrangement within the trigonal basal a–b-plane of ferromagnetic layers of iron and samarium having a canting angle of about 70° relative to each other. Neighbouring layers in the c-direction are antiferromagnetically coupled; at 2 K the magnetic moment values amount to μFe = 4.2(1) μB and μSm = 0.8(2) μB. The non-Brillouin type increase of the iron magnetic moment below TN points to a strong Fe–Sm exchange and to the simultaneous appearance of long range magnetic order on both sublattices.

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Держатели документа:
[Ritter, C.] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
[Pankrats, A.
Gudim, I.
Vorotynov, A.] RAS, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Ritter, C.; Pankrats, A.I.; Панкрац, Анатолий Иванович; Gudim, I. A.; Гудим, Ирина Анатольевна; Vorotynov, A.M.; Воротынов, Александр Михайлович
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Direct and inverse magnetoelectric effects in HoAl3(BO3)4 single crystal / A. L. Freydman [et al.] // J. Appl. Phys. - 2014. - Vol. 115, Is. 17. - Ст. 174103, DOI 10.1063/1.4874270. - Cited References: 34. - This work was supported by Russian Foundation for Basic Research (Project Nos. 13-02-12442ofi_m2 and 14-02-00307). The authors are grateful to V. N. Ilyushchenko for the help in preparing of this manuscript. . - ISSN 0021-8979. - ISSN 1089-7550

РУБ Physics, Applied
Рубрики:
POLARIZATION
BEHAVIOR
ORDER
Аннотация: The direct (MEH-) and inverse (MEE-) magnetoelectric effects in the HoAl3(BO3)4 single crystal are studied. Temperature and magnetic field dependences of permittivity of the crystal are investigated. A relation between the investigated effects was established. It was found that the magnetoelectric effect can exist in crystals without magnetic order or spontaneous polarization. It was shown that the phenomena investigated are due to magnetostriction or magnetoelastic effect. The thermodynamic potential was considered for describing magnetoelectric effect at low magnetic fields. The results obtained are explained within a proposed qualitative microscopic model, based on interplay of configuration of 4f- electron subshell of the rare-earth element and applied magnetic or electric field.
Изучаются прямой (MEH-) и обратный (МЭА-) магнитоэлектрические эффекты в монокристалле HoAl3(BO3)4 . Зависимости диэлектрической проницаемости кристалла от температуры и магнитного поля исследованы. Была создана связь между исследованными эффектами. Было обнаружено, что магнитоэлектрический эффект может существовать в кристаллах без магнитного порядка или спонтанной поляризации. Было показано, что исследуемые явления происходят из-за магнитострикции или магнитоупругого эффекта. Термодинамический потенциал рассчитывался для описания магнитоэлектрический эффект в слабых магнитных полях. Полученные результаты объясняются в рамках предложенной качественной микроскопической модели, основанной на взаимодействии конфигурации 4f-электронов в подоболочке редкоземельного элемента и внешнего магнитного или электрического поля.

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Доп.точки доступа:
Freydman, A. L.; Фрейдман, Александр Леонидович; Balaev, A. D.; Балаев, Александр Дмитриевич; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Eremin, E. V.; Еремин, Евгений Владимирович; Temerov, V. L.; Темеров, Владислав Леонидович; Gudim, I. A.; Гудим, Ирина Анатольевна; Russian Foundation for Basic Research [13-02-12442ofi_m2, 14-02-00307]
}
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10.

Effect of multiplicity fluctuation in cobalt ions on crystal structure, magnetic and electrical properties of NdCoO3 and SmCoO3 / V. A. Dudnikov, Y. S. Orlov, L. A. Solovyov [et al.] // Molecules. - 2020. - Vol. 25, Is. 6. - Ст. 1301, DOI 10.3390/molecules25061301. - Cited References: 56. - This work is supported by the Russian Science Foundation grant 18-02-00022. . - ISSN 1420-3049

РУБ Biochemistry & Molecular Biology + Chemistry, Multidisciplinary
Рубрики:
SPIN-STATE TRANSITIONS
   CO3+ ION
   CONDUCTIVITY
   TEMPERATURE
   BEHAVIOR
Кл.слова (ненормированные):
rare-earth cobalt oxides -- multiplicity fluctuations -- structural -- magnetic -- electrical -- and dilatation properties
Аннотация: The structural, magnetic, electrical, and dilatation properties of the rare-earth NdCoO3 and SmCoO3 cobaltites were investigated. Their comparative analysis was carried out and the effect of multiplicity fluctuations on physical properties of the studied cobaltites was considered. Correlations between the spin state change of cobalt ions and the temperature dependence anomalies of the lattice parameters, magnetic susceptibility, volume thermal expansion coefficient, and electrical resistance have been revealed. A comparison of the results with well-studied GdCoO3 allows one to single out both the general tendencies inherent in all rare-earth cobaltites taking into account the lanthanide contraction and peculiar properties of the samples containing Nd and Sm.

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Держатели документа:
RAS, Kirensky Inst Phys, Fed Res Ctr KSC, SB, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
RAS, Fed Res Ctr KSC, Inst Chem & Chem Technol, SB, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Lebedev Phys Inst, Moscow 119991, Russia.
Russian Acad Sci, Ioffe Inst, St Petersburg 194021, Russia.

Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Solovyov, Leonid A.; Vereshchagin, Sergey N.; Gavrilkin, Sergey Yu.; Tsvetkov, Alexey Yu.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Gorev, M. V.; Горев, Михаил Васильевич; Novikov, Sergey V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Science FoundationRussian Science Foundation (RSF) [18-02-00022]
}
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