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Martynov, S. N.
Antisymmetric Exchange in the CuB2O4 A Subsystem / S. N. Martynov // JETP Letters. - 2009. - Vol. 90, Is. 1. - P. 55-58, DOI 10.1134/S0021364009130116. - Cited References: 31 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
TRANSVERSE MAGNETIC-FIELD
   FLUCTUATION-INDUCED PHASE
   COPPER METABORATE
   ANTIFERROMAGNETIC CHAINS
   SOLITON LATTICE
   INDUCED GAP
   SPIN-WAVES
   BA2CUGE2O7
   CSCUCL3
   MNSI
Аннотация: The space distribution of the components of the microscopic Hamiltonian of the antisymmetric Dzyaloshinskii-Moriya exchange with respect to the exchange bond pairs of the A subsystem of Cu2+ ions in the crystallographic 4b positions of CuB2O4 has been obtained using symmetry analysis. The possibility of the coexistence of two different types of the exchange spatial distribution is demonstrated. The component of the anti-symmetric exchange vector D parallel to the tetragonal axis has a weakly ferromagnetic distribution for all of the directions of the bonds between the nearest magnetic neighbors. Each exchange bond has an additional component of the antisymmetric exchange parallel to the bond projection on the tetragonal plane. The spatial distribution of these components is helicoidal with the modulation vector in the tetragonal crystal plane.

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

Доп.точки доступа:
Мартынов, Сергей Николаевич
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Bound state in the continuum in 1D chain of dielectric disks: Theory and experiment / M. Balyzin [et al.] // J. Phys. Conf. Ser. - 2018. - Vol. 1092: 3rd International Conference on Metamaterials and Nanophotonics, METANANO 2018 (17 - 21 September 2018). - Ст. 012012, DOI 10.1088/1742-6596/1092/1/012012. - Cited References: 11. - This work is supported by RSF (17-12-01581)
Кл.слова (ненормированные):
1-D chains -- Bound state -- Ceramic disks -- Dielectric disks -- GHz frequencies -- Material loss -- Quadratic growth -- Zero angular momentum
Аннотация: In this work we experimentally observe a symmetry protected optical bound state in the continuum (BIC) with zero angular momentum in 1D array of ceramic disks at GHz frequencies. We analyze the dependence of Q factor of BIC on the number of the disks and the level of the material losses. We confirmed theoretical prediction about quadratic growth of the Q factor with the number of the disks and its following saturation due to material losses.

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Держатели документа:
Department of Nanophotonics and Metamaterials, ITMO University, Saint-Petersburg, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Balyzin, M.; Sadrieva, Z.; Belyakov, M. A.; Kapitanova, P.; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Bogdanov, A.; International Conference on Metamaterials and Nanophotonics(3rd ; 17 - 21 September 2018 ; Sochi, Russian Federation)
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Controllable propagation of surface plasmon polaritons in chains of non-spherical nanoparticles on dielectric substrate / I. L. Rasskazov [и др.] // Electromagnetic & Light Scattering XV : abstracts. - Leipzig, 2015. - Ст. 88

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Доп.точки доступа:
Rasskazov, I. L.; Рассказов, Илья Леонидович; Karpov, S. V.; Карпов, Сергей Васильевич; Panasyuk, G. Y.; Markel, V. A.; Electromagnetic and Light Scattering Conference(15 ; 2015 ; Jun. ; 21-26 ; Leipzig, Germany)
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Crystal structures of new potassium silicates and aluminosilicates of Sm, Tb, Gd, and Yb and their relation to the armstrongite (CaZr(Si6O15)·3H2O) structure / V. K. Taroev [et al.] // J. Solid State Chem. - 2015. - Vol. 227. - P. 196-203, DOI 10.1016/j.jssc.2015.03.004. - Cited References:27. - We appreciate the financial support by the Russian Fund of Basic Research under grant 10-05-00344-a. We thank the two anonymous reviewers for their helpful comments and suggestions and Ms. Schroeder (KIT-PKM) for improving the English of the manuscript. . - ISSN 0022. - ISSN 1095-726X. -

РУБ Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
BOND-VALENCE PARAMETERS
CHAINS
SYSTEM
Кл.слова (ненормированные):
Hydrothermal synthesis -- REE-potassium silicates -- X-ray diffraction -- Crystal structure refinement
Аннотация: Silicates of composition K7.81Sm3Si12O32(OH)0.81·0.77H2O and K7Tb3Si12O32·1.36H2O, with the space group P 1 ¯ and unit cell parameters of a=6.9218(3), b=11.4653(4), c=11.6215(4) Å, α=88.063(3)°, β=88.449(3)°, γ=79.266(3)° and a=6.872(3), b=11.440(5), c=11.542(6) Å, α=88.19(4)°, β=88.86(4)°, γ=79.65(4)°, respectively, were synthesized under hydrothermal conditions. Both crystal structures were determined from twinned crystals, and can be idealized to a composition of K7Ln3Si12O32 (KOH)x(H2O)(2−x) (Ln=Sm, Tb), which is closely related to K8Nd3Si12O32(OH). Crystals of the aluminosilicates K2GdAlSi4O12·0.25H2O and K2SmAlSi4O12·0.375H2O prepared by the same method possess monoclinic symmetry with the space group C2/c. The corresponding unit cell parameters are: a=26.67(1), b=7.294(3), c=14.835(6) Å, β=123.44(3)°; and a=26.7406(9), b=7.3288(2), c=14.8498 (6) Å, β=123.514(1)°, respectively. A new type of silicate anion that forms tubes was detected in the K4Yb2Si8O21 structure. K4Yb2Si8O21 is of monoclinic symmetry with the space group C2/c. The unit cell parameters are: a=17.440(2), b=11.786(1), c=12.802 (2) Å, and β=130.902(1)°. The structure is a mixed framework of tubes formed by silica-oxygen tetrahedra connected by pairs of edge sharing Yb-octahedra. The relation of the silicate layers and frameworks encountered in these compounds to the armstrongite silicate framework is discussed.

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Держатели документа:
RAS, Ap Vinogradov Geochem Inst, Siberian Branch, Irkutsk 664033, Russia
Natl Res Irkutsk State Tech Univ, Irkutsk 664054, Russia
RAS, Inst Earth Crust, Siberian Branch, Irkutsk 664054, Russia
Univ Hamburg, Mineral Petrog Inst, D-20146 Hamburg, Germany
Karlsruhe Inst Technol, ANKA Synchrotron Radiat Facil, D-76344 Eggenstein Leopoldshafen, Germany
RAS, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Taroev, V. K.; Kashaev, A. A.; Malcherek, T.; Goettlicher, J.; Kaneva, E. V.; Vasiljev, A. D.; Васильев, Александр Дмитриевич; Suvorova, L. F.; Suvorova, D. S.; Tauson, V. L.; Russian Fund of Basic Research [10-05-00344-a]
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Val'kov, V. V.
Effect of intersite repulsion on the correlation functions and thermodynamics of an Ising chain with annealed magnetic disorder / V. V. Val’kov, M. S. Shustin // Bull. Russ. Acad. Sci. Phys. - 2016. - Vol. 80, Is. 11. - P. 1335-1337, DOI 10.3103/S1062873816110290. - Cited References: 6. - This work was supported by the Russian Foundation for Basic Research, project nos. 13-02-00073, 14-02-31237, and 15-42-04372. . - ISSN 1062-8738
Кл.слова (ненормированные):
Chains -- Magnetic susceptibility -- Temperature distribution -- Thermodynamics -- Transfer matrix method -- Correlation function -- Equilibrium behavior -- Equilibrium distributions -- Non-magnetic impurities -- Quantum phase transitions -- Repulsion parameter -- Temperature dependence -- Transfer matrix technique -- Phase transitions
Аннотация: An exact solution for a model describing the equilibrium behavior of an ensemble of Ising chains with nonmagnetic intersite repulsion of nearest neighbors and an equilibrium distribution of nonmagnetic impurities is obtained using the transfer matrix technique. The possibility of exciting quantum phase transitions using the intersite repulsion parameter in a system is demonstrated. Proximity to the critical points of these transitions has a substantial effect on the temperature dependence of a system’s magnetic susceptibility. © 2016, Allerton Press, Inc.

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Публикация на русском языке Вальков, Валерий Владимирович. Влияние эффектов межузельного отталкивания на корреляционные функции и термодинамику изинговской цепочки с отожженным магнитным беспорядком [Текст] / В. В. Вальков, М. С. Шустин // Изв. РАН. Сер. физич. - 2016. - Т. 80 № 11. - С. 1504-1506

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Shustin, M. S.; Шустин, Максим Сергеевич; Вальков, Валерий Владимирович
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Elastic and inelastic neutron study of CuGeO3 / B. Roessli [et al.] // J. Phys.: Condens. Matter. - 1994. - Vol. 6, Is. 41. - P. 8469-8477, DOI 10.1088/0953-8984/6/41/009. - Cited References: 18 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
SPIN-PEIERLS TRANSITION
CHAINS
Аннотация: Elastic and inelastic neutron scattering was used to probe the structural and magnetic properties of polycrystalline CuGeO3. The diffraction data show that the chemical lattice remains stable in the measured temperature range 1.5 K less-than-or-equal-to T less-than-or-equal-to 296 K. At low temperature the inelastic experiments revealed a well defined magnetic excitation at 15 meV, which persists up to T = 50 K. The analysis of the spin-wave spectrum is based on a one-dimensional Heisenberg model within the spin-wave theory. On the other hand, no evidence of energy-gap opening, which would result from a dimerization of the Cu chains, could be found at low temperature.

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Держатели документа:
PAUL SCHERRER INST,CH-5232 VILLIGEN,SWITZERLAND
ACAD SCI,KRASNOYARSK 660036,RUSSIA
BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973
ETH ZURICH,NEUTRON SCATTERING LAB,CH-5232 VILLIGEN,SWITZERLAND
КНЦ СО РАН

Доп.точки доступа:
Roessli, B.; Fischer, P.; Schefer, J.; Buhrer, W.; Furrer, A.; Vogt, T.; Petrakovskii, G. A.; Петраковский, Герман Антонович; Sablina, K. A.; Саблина, Клара Александровна
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Aplesnin, S. S.
Investigation of the magnetic properties of chains with alternating ferro- and antiferromagnetic exchange interactions in the Heisenberg model with spin S=1/2 / S. S. Aplesnin, G. A. Petrakovskii // Phys. Solid State. - 1999. - Vol. 41, Is. 9. - P. 1511-1512, DOI 10.1134/1.1131042. - Cited References: 11 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
HALDANE-GAP
SYSTEMS
Аннотация: The quantum Monte Carlo method is used to calculate the susceptibility and pairwise spin-spin correlation functions of chains with alternating ferro (K)- and antiferromagnetic (J)-exchange interactions within the Heisenberg model with spin S=1/2. From the susceptibility, the energy gap between the ground state and excited triplet states is determined for arbitrary ratios K/J. The value of the gap coincides with the Haldane gap for spin S=1 when K/J 1.25. (C) 1999 American Institute of Physics. [S1063-7834(99)02409-0].

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Публикация на русском языке Аплеснин, Сергей Степанович. Исследование магнитных свойств цепочки с чередующимися ферро- и антиферромагнитными обменными взаимодействиями в модели Гейзенберга со спином S=1/2 [Текст] / С. С. Аплеснин, Г. А. Петраковский // Физ. тверд. тела. - Санкт-Петербург, 1999. - Т. 41 Вып. 9. - С. 1650-1651

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

Доп.точки доступа:
Petrakovskii, G. A.; Петраковский, Герман Антонович; Аплеснин, Сергей Степанович
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Bulgakov, E. N.
Light guiding above the light line in arrays of dielectric nanospheres / E. N. Bulgakov, D. N. Maksimov // Opt. Lett. - 2016. - Vol. 41, Is. 16. - P. 3888-3891, DOI 10.1364/OL.41.003888. - Cited References: 46. - Russian Foundation for Basic Research (RFBR) (16-02-00314). . - ISSN 0146-9592

РУБ Optics
Рубрики:
SUBWAVELENGTH WAVE-GUIDES
   OPTICAL MODES
   NANOPARTICLES
   CHAINS
   RESONANCES
   PARTICLES
   SPHERES
Аннотация: We consider light propagation above the light line in arrays of spherical dielectric nanoparticles. It is demonstrated numerically that quasi-bound leaky modes of the array can propagate both stationary waves and light pulses to a distance of 60 wavelengths at the frequencies close to the bound states in the radiation continuum. A semi-analytical estimate for decay rates of the guided waves is found to match the numerical data to a good accuracy. © 2016 Optical Society of America.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Булгаков, Евгений Николаевич
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Magnetic and electrical properties of Fe1.91V0.09BO4 warwickite / A. D. Balaev [et al.] // J. Exp. Theor. Phys. - 2003. - Vol. 97, Is. 5. - P. 989-995, DOI 10.1134/1.1633954. - Cited References: 22. - This study was supported in part by the Russian Foundation for Basic Research (project no. 03-02-16286) and by the Federal Program “Integration” (project no. B0017) . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
ELECTRONIC-STRUCTURE
   CRYSTAL-STRUCTURE
   FE2OBO3
   CHAINS
   FE2BO4
   FEBO3
Кл.слова (ненормированные):
Electric conductivity -- Magnetic variables measurement -- Magnetization -- Single crystals -- Hopping conductivity -- Warwickite -- Iron compounds
Аннотация: We have performed a complex investigation of the structure and the magnetic and electrical properties of a warwickite single crystal with the composition Fe1.91V0.09BO4 . The results of Mossbauer measurements at T = 300 K indicate that there exist "localized" (Fe2+, Fe3+) and "delocalized" (Fe2.5+) states distributed over two crystallographically nonequivalent positions. The results of magnetic measurements show that warwickite is a P-type ferrimagnet below T = 130 K. The material exhibits hopping conductivity involving strongly interacting electrons. The experimental data are analyzed in comparison to the properties of the initial (unsubstituted) Fe2BO4 warwickite. The entire body of data on the electric conductivity and magnetization are interpreted on a qualitative basis. (C) 2003 MAIK "Nauka / Interperiodica".

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Публикация на русском языке Магнитные и электрические свойства варвикита Fe[1.91]V[0.09]BO[4] [Текст] / А. Д. Балаев [и др.] // Журн. эксперим. и теор. физ. - 2003. - Т. 124 Вып. 5. - С. 1103-1111

Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Krasnoyarsk State Tech Univ, Krasnoyarsk 660074, Russia
Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State Technical University, Krasnoyarsk, 660074, Russian Federation
Physikalisches Institut II, Universitat zu Koln, 50937 Koln, Germany

Доп.точки доступа:
Balaev, A. D.; Балаев, Александр Дмитриевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Ivanova, N. B.; Иванова, Наталья Борисовна; Kazak, N. V.; Казак, Наталья Валерьевна; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Abd-Elmeguid, M. M.; Rudenko, V. V.; Руденко, Валерий Васильевич
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10.

Magnetic phase transitions in the double spin-chains compound LiCu2O2 / B. . Roessli [et al.] // Physica B. - 2001. - Vol. 296, Is. 4. - P. 306-311, DOI 10.1016/S0921-4526(00)00574-3. - Cited References: 17 . - ISSN 0921-4526

РУБ Physics, Condensed Matter
Рубрики:
ORDERED MOMENT
   COPPER
   CRYSTAL
   LI2CUO2
Кл.слова (ненормированные):
muon-spin rotation -- spin ladder -- magnetic ordering -- LiCu2O2 -- Crystal structure -- Lithium compounds -- Magnetic anisotropy -- Magnetic field effects -- Magnetic relaxation -- Magnetization -- Order disorder transitions -- Specific heat of solids -- X ray diffraction analysis -- Anisotropic line broadening -- Muon spin rotation -- Spin ladder -- Antiferromagnetic materials
Аннотация: We report high-resolution X-ray diffraction, muon-spin-rotation spectroscopic and specific heat measurements in the double spin-chains compound LiCu2O2. The X-ray diffraction results show that the crystal structure of LiCu2O2 is orthorhombic down to T = 10 K. Anisotropic line-broadening of the diffraction peaks is observed, indicating disorder along the spin chains. Muon-spin relaxation and specific heat measurements show that LiCu2O2 undergoes a phase transition to a magnetic ordered state at T-1 similar to 24 K. The specific heat data exhibits a second lambda -like peak at T-2 similar to 32.5 K, which increases with increasing magnetic field in a similar way to that found in spin-ladder compounds. (C) 2001 Elsevier Science B.V. All rights reserved.

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Держатели документа:
Paul Scherrer Inst, Neutron Scattering Lab, CH-5232 Villigen, Switzerland
ETH Zurich, CH-5232 Villigen, Switzerland
Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland
Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland
Univ Lausanne, Inst Crystallog, CH-1015 Lausanne, Switzerland
RAS, SB, Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Laboratory for Neutron Scattering, Paul Scherrer Inst. and ETH Zurich, CH-5232 Villigen PSI, Switzerland
Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
Lab. for Muon-Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
Institut de Crystallographie, Universite de Lausanne, CH-1015 Lausanne, Switzerland
Institute of Physics SB RAS, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Roessli, B.; Staub, U.; Amato, A.; Herlach, D.; Pattison, P.; Sablina, K. A.; Саблина, Клара Александровна; Petrakovskii, G. A.; Петраковский, Герман Антонович
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