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A neutron scattering and mu SR investigation of the magnetic phase transitions of CuB2O4 / M. . Boehm [et al.] // Physica B. - 2002. - Vol. 318: 6th Patras-University Euroconference on Properties of Condensed Matter Probed with X-Ray Scattering-Electron Correlations and Magnetism (SEP 21-25, 2001, PATRAS, GREECE), Is. 4. - P. 277-281, DOI 10.1016/S0921-4526(02)00788-3. - Cited References: 8 . - ISSN 0921-4526

РУБ Physics, Condensed Matter
Рубрики:
COPPER METABORATE
Кл.слова (ненормированные):
magnetic soliton lattice -- Dzyaloshinskii-Moriya interaction -- neutron diffraction -- mu SR
Аннотация: We have investigated the magnetic ground state in CuB2O4, copper metaborate, by means of neutron diffraction and muSR measurements. At T-N = 21 K CuB2O4 undergoes a second-order phase transition from a paramagnetic to an antiferromagnetic commensurate state followed by a second transition at T* = 10 K where the two magnetic sublattices form a soliton lattice, as reported earlier. We give a detailed analysis of the magnetic structure in the commensurate phase which is found to be different from the one published recently. New experimental results are presented which show the existence of a third transition below T approximate to 1.8 K. The magnetic structure remains incommensurate at very low temperatures, but a re-distribution of the magnetic intensities is observed in the neutron diffraction data set which suggests that the phases between the Cu2+ spins are changed. (C) 2002 Elsevier Science B.V. All rights reserved.

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Держатели документа:
Inst Laue Langevin, F-38042 Grenoble 9, France
Swiss Fed Inst Technol, Lab Neutron Scattering, CH-5232 Villigen, Switzerland
Paul Scherrer Inst, CH-5232 Villigen, Switzerland
Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland
Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland
RAS, Inst Phys SB, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Boehm, M.; Roessli, B.; Schefer, J.; Ouladdiaf, B.; Amato, A.; Baines, C.; Staub, U.; Petrakovskii, G. A.; Петраковский, Герман Антонович
}
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A Raman scattering study of the phase transition in the ammonium oxyfluoride (NH4)(3)TiOF5 / Y. V. Gerasimova [et al.] // Phys. Solid State. - 2008. - Vol. 50, Is. 8. - P. 1534-1537, DOI 10.1134/S1063783408080246. - Cited References: 8 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
(NH4)(3)WO3F3 OXYFLUORIDE
Аннотация: Raman spectra of a polycrystalline sample of the perovskite-like oxyfluoride (NH4)(3)TiOF5 are measured in the frequency region 100-3600 cm(-1) at temperatures ranging from 91 to 370 K under hydrostatic pressures of up to 9 GPa, which include the range of the phase transition from the orientationally disordered cubic phase to the low-symmetry phase. Anomalies in the spectral parameters due to the phase transition are revealed in the range of vibrations of TiOF5 octahedral groups.

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Держатели документа:
[Gerasimova, Yu. V.
Krylov, A. S.
Vtyurin, A. N.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Gerasimova, Yu. V.
Krylov, A. S.
Vtyurin, A. N.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Laptash, N. M.] Russian Acad Sci, Inst Chem, Far E Branch, Vladivostok 690022, Russia
[Goryainov, S. V.] Inst Mineral & Petrog, Siberian Branch, Novosibirsk 630090, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk 660041, Russian Federation
Institute of Chemistry, Far-East Branch, Russian Academy of Sciences, pr. Stoletiya Vladivostoka 159, Vladivostok 690022, Russian Federation
Institute of Mineralogy and Petrography, Siberian Branch, Universitetskii pr. 3, Novosibirsk 630090, Russian Federation

Доп.точки доступа:
Gerasimova, Y. V.; Герасимова, Юлия Валентиновна; Krylov, A. S.; Крылов, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Laptash, N. M.; Goryainov, S. V.
}
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A study of phase transition in (NH4)(3)WO3F3 oxyfluoride by Raman scattering / A. S. Krylov [et al.] // Phys. Status Solidi B. - 2006. - Vol. 243, Is. 2. - P. 435-441, DOI 10.1002/pssb.200541259. - Cited References: 11 . - ISSN 0370-1972

РУБ Physics, Condensed Matter
Рубрики:
ELPASOLITE RB2KSCF6
Аннотация: Raman scattering spectra of perovskite-like (NH4)(3)WO3F3 oxyfluoride are studied in the 70-3600 cm(-1) frequency range and the 93-323 K temperature range including the transition point from orientationally disordered cubic phase into the lower symmetry one. Internal vibrations of ammonium ions and WO3F3 octahedra have been found to exhibit transition anomalies. Analysis of measurements suggests that the transition under study is due mainly to the ordering of octahedra.

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Держатели документа:
Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Inst Chem, Vladivostok 690022, Russia
ИФ СО РАН
Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation
Institute of Chemistry, 690022 Vladivostok, Russian Federation

Доп.точки доступа:
Krylov, A. S.; Крылов, Александр Сергеевич; Gerasimova, J. V.; Герасимова, Юлия Валентиновна; Vtyurin, A. N.; Втюрин, Александр Николаевич; Fokina, V. D.; Фокина, Валентина Дмитриевна; Laptash, N. M.; Voyt, E. I.
}
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SHAPIRO, V. E.
ACCELERATION EFFECT DUE TO SCATTERING ON THERMAL EXCITATIONS / V. E. SHAPIRO // Fiz. Tverd. Tela. - 1985. - Vol. 27, Is. 6. - P. 1846-1851. - Cited References: 19 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

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Analysis of function of copper sulfide nanoparticles as sphalerite flotation activator / S. A. Vorob’ev, E. A. Burdakova, A. A. Sarycheva [et al.] // J. Min. Sci. - 2021. - Vol. 57, Is. 1. - P. 144-153, DOI 10.1134/S1062739121010154. - Cited References: 22. - This study was supported by the Russian Science Foundation, project no. 18-17-00135 . - ISSN 1062-7391
Кл.слова (ненормированные):
nanoparticles -- copper sulfide -- flotation -- sphalerite -- activators -- dynamic light scattering -- X-ray photoelectron spectroscopy
Аннотация: The authors compare the effect exerted by copper ions and sulphide copper nanoparticles on flotation of Gorevka deposit sphalerite using potassium n-butyl xanthate and in reagent-less regime. Covelline-like colloid particles 4–8 nm in size, obtained in interaction of copper (II) and sulfide ions in aqueous solutions, are characterized using the methods of dynamic light scattering, electron microscopy and diffraction. Sphalerite surface after reaction with copper ions and CuS dispersoid solutions are described by zeta-potential measurements and X-ray photoelectron spectroscopy. It is found that sphalerite flotation after activation with nanoparticles is lower than with copper ion solutions of the same concentrations, and improves with increasing duration of activation and flotation processes. The mechanism of CuS nanoparticles consists in creation of active centers for the collector to attach to, which intensifies the hydrophobic behavior and adsorption of the collector. Moreover, CuS nanoparticles promote formation of a special microrelief of the solid–liquid interface, which ensures rupture of liquid film and attachment of sphalerite particles to air bubbles when they collide.

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Публикация на русском языке Изучение действия наночастиц сульфида меди как активатора флотации сфалерита [Текст] / С. А. Воробьев, Е. А. Бурдакова, И. В. Сарычева [и др.] // Физ.-техн. проблемы разраб. полез. ископаемых. - 2021. - № 1. - С. 159-168

Держатели документа:
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Vorob’ev, S. A.; Burdakova, E. A.; Sarycheva, A. A.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Karacharov, A. A.; Likhatskii, M. N.; Mikhlin, Y. L.
}
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Analyzing the symmetry of the Raman spectra of crystals according to angular dependences / E. V. Golovkina, S. N. Krylova, A. N. Vtyurin, A. S. Krylov // Bull. Russ. Acad. Sci. Phys. - 2024. - Vol. 88, Is. 5. - P. 773-778, DOI 10.1134/S1062873824706573. - Cited References: 32. - This work was supported by the Russian Foundation for Basic Research, project no. 21-52-12018. The authors are grateful to Dr. Irena Senkovska for providing our DUT-8(Ni) samples . - ISSN 1062-8738. - ISSN 1934-9432
Кл.слова (ненормированные):
angular dependences of Raman scattering -- metal–organic framework crystals
Аннотация: The authors propose a way of reconstructing the Raman tensor by studying the angular dependences of the intensities of the Raman lines of unoriented microcrystals. The technique is verified using familiar calomel Hg2Cl2 crystals. It is shown that the lines on DUT-8 (Ni) crystals indicating phases with open and closed pores have different types of symmetries. The technique can be used to reconstruct the Raman tensor for any unoriented crystalline sample.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia

Доп.точки доступа:
Golovkina, E. V.; Головкина, Елена Вячеславовна; Krylova, S. N.; Крылова, Светлана Николаевна; Vtyurin, A. N.; Втюрин, Александр Николаевич; Krylov, A. S.; Крылов, Александр Сергеевич
}
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Petrov, M. I.
Andreev reflection and experimental temperature dependences of the critical current in heterogeneous high-temperature superconductors (polycrystals and related composites) / M. I. Petrov, D. A. Balaev, D. M. Gokhfeld // Phys. Solid State. - 2007. - Vol. 49, Is. 4. - P. 619-626, DOI 10.1134/S106378340704004X. - Cited References: 41 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
CURRENT-VOLTAGE CHARACTERISTICS
   NORMAL-METAL
   WEAK LINKS
   JOSEPHSON-JUNCTIONS
   MODEL
   SCATTERING
   TRANSPORT
   DISSIPATION
   HYSTERESIS
Аннотация: The temperature dependences of the critical current of Y3/4Lu1/4Ba2Cu3O7 polycrystalline high-temperature superconductors subjected to annealing for different times and those of Y3/4Lu1/4Ba2Cu3O7 + BaPbO3 composites were measured. The results obtained were analyzed in terms of the Gunsenheimer-Schussler-Kummler theory considering the Andreev reflection of carriers in a "superconductor-normal metal-superconductor" (S-N-S) junction. Good agreement between the experimental and theoretical temperature dependences of the critical current over a wide temperature range for polycrystals with both natural and artificially created boundaries (composites) made it possible to estimate the effective length of grain boundaries in the high-temperature superconductors. It was revealed that the critical current density measured at 4.2 K is an exponential function of the length of grain boundaries in samples of both types.

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

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Петров, Михаил Иванович
}
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Andreev reflection in natural grain boundaries of polycrystalline high-T-c superconductor La1.85Sr0.15CuO4 / M. I. Petrov [et al.] // Phys. Solid State. - 2003. - Vol. 45, Is. 7. - P. 1219-1222, DOI 10.1134/1.1594233. - Cited References: 30 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
CURRENT-VOLTAGE CHARACTERISTICS
   WEAK LINKS
   CHARGE-TRANSPORT
   JUNCTIONS
   CONDUCTIVITY
   HYSTERESIS
   COMPOSITES
   SCATTERING
Аннотация: The temperature evolution of the current-voltage characteristic (CVC) of a "break junction" with metal-type conductivity on the polycrystalline La1.85Sr0.15CuO4 high-temperature superconductor is investigated. The CVC exhibits gap peculiarities and hysteresis, which is observed in the region of negative differential resistance. The experimental results are described well in terms of the Kummel-Gunsenheimer-Nicolsky theory for an S-N-S junction (S is a superconductor, N is a normal metal) this theory takes into account multiple Andreev reflection of quasiparticles. It is shown that the shape of the CVC and the existence and the shape of hysteresis are determined by the ratio of "long" and "short" grain boundaries in the polycrystal under investigation. (C) 2003 MAIK "Nauka / Interperiodica".

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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Reshetnev Siberian Stt. Aerosp. U., Krasnoyarsk 660014, Russian Federation

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Gokhfel'd, D. M.; Гохфельд, Денис Михайлович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович
}
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Andreev reflections and experimental current-voltage characteristics of break junctions of polycrystalline HTSC / M. I. Petrov [et al.] // Physica C. - 2004. - Vol. 408: 7th International Conference on Materials and Mechanisms of Superconductive and High Temperature Superconductors (MAY 25-30, 2003, Rio de Janeiro, BRAZIL). - P. 620-622, DOI 10.1016/j.physc.2004.03.085. - Cited References: 3 . - ISSN 0921-4534

РУБ Physics, Applied

Кл.слова (ненормированные):
Andreev reflections -- break junction -- current-voltage characteristics -- Andreev reflections -- Break junction -- Current-voltage characteristics -- Andreev reflections -- Break junctions -- Elastic scattering -- Lattice defects -- Negative differential resistance -- Electric fields -- Heuristic methods -- Hysteresis -- Microcracks -- Polycrystalline materials -- Probability density function -- Quasicrystals -- Superconducting materials -- Yttrium barium copper oxides -- Current voltage characteristics
Аннотация: The temperature evolution of current-voltage characteristics (CVCs) of break junctions made from polycrystalline Y0.75Lu0.25Ba2Cu3O7 and La1.85Sr0.15CuO4 is investigated. The experimental CVCs have hysteretic features that reflect a part of a curve with negative differential resistance. The temperature evolution of the CVCs is discussed within the framework of the Kummel-Gunsenheimer-Nicolsky theory for superconductor/normal-metal/superconductor junctions considering multiple Andreev reflections. It is shown that the shape of the CVCs of break junctions is determined by the ratio of the number of "short" and "long" intergrain normal regions in the polycrystalline HTSC under investigation. (C) 2004 Elsevier B.V. All rights reserved.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany
ИФ СО РАН
Kirensky Intitute of Physics, Akademgorodok, 660036 Krasnoyarsk, Russian Federation
Reshetnev Siberian Stt. Aerosp. U., 660014 Krasnoyarsk, Russian Federation
Inst. fur Theor. Phys./Astrophys., Universitat Wurzburg, D-97074 Wurzburg, Germany

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaihutdinov, K. A.; Kummel, R.
}
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10.

Anharmonicity and local noncentrosymmetric regions in BaTiO3 pressed powder studied by the Raman line temperature dependence / A. M. Pugachev, I. V. Zaytseva, N. V. Surovtsev, A. S. Krylov // Ceram. Int. - 2020. - Vol. 46, Is. 14. - P. 22619-22623, DOI 10.1016/j.ceramint.2020.06.024. - Cited References: 26. - The reported study was funded by RFBR , according to the research project No. 18-02-00399 and 19-42-543-016 , Government of Novosibirsk region No. 19-42-543-016 and State assignment No AAAA-A17-117052410033-9. The experiments were performed in the multiple-access center “High-Resolution Spectroscopy of Gases and Condensed Matter” in IA&E SB RAS (Novosibirsk, Russia) and Center for Common Use of the Krasnoyarsk Scientific Center, SB RAS (Krasnoyarsk, Russia) . - ISSN 0272-8842
Кл.слова (ненормированные):
BaTiO3 -- Non-hydrostatic pressure -- Raman scattering -- Anharmonicity -- Noncentrosymmetric regions
Аннотация: The temperature dependencies of position, width, and integral amplitude the E(TO) line near 307 cm−1 in Raman spectra in barium titanate powders with different non-hydrostatic pressure and temperature treatment were studied. It was found that parameters of the E(TO) line near 307 cm−1 are different in the crystal, the untreated powder, the powder treated by the non-hydrostatic pressure, and the powder annealed after the pressure treatment. The line width (FWHM) increase with temperature according to Klemens model. It indicates that the origin of the line broadening is the anharmonicity of the E(TO) phonons. The pressure treatment changes the anharmonicity of the phonon potential. It was found that the temperature dependence of the integral intensity of the E(TO) line is similar to that of the second optical harmonic signal and reflects the presence of the local polar regions. Thus, the E(TO) line in the Raman spectrum allows one to characterize the average polarity of local regions and their anharmonicity depending on non-hydrostatic pressures and thermal treatment.

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Держатели документа:
Institute of Automation and Electrometry SB RAS, Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Pugachev, A. M.; Zaytseva, I. V.; Surovtsev, N. V.; Krylov, A. S.; Крылов, Александр Сергеевич
}
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11.

Anisotropic quasiparticle lifetimes in Fe-based superconductors / A. F. Kemper [et al.] // Phys. Rev. B. - 2011. - Vol. 83, Is. 18. - Ст. 184516, DOI 10.1103/PhysRevB.83.184516. - Cited References: 43. - We thank O. Dolgov, R. Hackl, D. Maslov, I. Mazin, B. Muschler, V. Mishra, and J. Schmalian for useful discussions. A. F. K. and T. P. D. thank the Walther MeiBner Institut for their hospitality. A. F. K., M. M. K., and P. J. H. acknowledge support from DOE Grant No. DE-FG02-05ER46236. M. M. K. acknowledges support from RFBR (Grant No. 09-02-00127), Presidium of RAS program "Quantum physics of condensed matter" N5.7, FCP Scientific and Research-and-Educational Personnel of Innovative Russia for 2009-2013 (GK P891), and President of Russia (Grant No. MK-1683.2010.2). A. F. K. and T. P. D. acknowledge support from DOE Grant No. DE-AC02-76SF00515. H.-P. C. and J.N.F. acknowledge DOE/BES Grant No. DE-FG02-02ER45995. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
ELECTRONIC RAMAN-SCATTERING
Аннотация: We study the dynamical quasiparticle scattering by spin and charge fluctuations in Fe-based pnictides within a five-orbital model with on-site interactions. The leading contribution to the scattering rate is calculated from the second-order diagrams with the polarization operator calculated in the random-phase approximation. We find one-particle scattering rates which are highly anisotropic on each Fermi surface sheet due to the momentum dependence of the spin susceptibility and the multiorbital composition of each Fermi pocket. This fact, combined with the anisotropy of the effective mass, produces disparity between electrons and holes in conductivity, the Hall coefficient, and the Raman initial slope, in qualitative agreement with experimental data.

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Держатели документа:
[Kemper, A. F.
Devereaux, T. P.
Hirschfeld, P. J.] Stanford Inst Mat & Energy Sci, SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA
[Kemper, A. F.
Devereaux, T. P.
Hirschfeld, P. J.] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA
[Kemper, A. F.
Korshunov, M. M.
Fry, J. N.
Cheng, H-P.
Hirschfeld, P. J.] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
[Korshunov, M. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Stanford Institute for Materials and Energy Science, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, United States
Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, United States
Department of Physics, University of Florida, Gainesville, FL 32611, United States
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Kemper, A. F.; Korshunov, M. M.; Коршунов, Максим Михайлович; Devereaux, T. P.; Fry, J. N.; Cheng, H. P.; Hirschfeld, P. J.
}
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12.

Anomalous in-plane electronic scattering in charge ordered Na 0.41CoO 2•0.6H 2O / G. X. Cao [et al.] // Phys. Rev. Lett. - 2012. - Vol. 108, Is. 23. - Ст. 236401, DOI 10.1103/PhysRevLett.108.236401. - Cited References: 41. - We thank H. Habermeier, D. Mandrus, B. C. Sales, I. Eremin, I. I. Mazin, and P. J. Hirschfeld for useful discussions. G. Cao acknowledges support from NSFC (No. 10804068, 10774097). M. M. K. acknowledges support from RFBR (Grant No. 09-02-00127), Presisium of RAS program "Quantum physics of condensed matter" N5.7, Integration Grant of SBRAS-UrBRAS N40, and Russian FCP (GK 16.740.12.0731), and The Dynasty Foundation and ICFPM. Work at ORNL was supported by the Department of Energy, BES, Materials Science and Engineering Division. . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
Рубрики:
SUPERCONDUCTIVITY
   TRIPLET
   FLUCTUATIONS
   IONS
Аннотация: We report electronic transport measurements on high quality floating zone grown NaxCoO2 and Na0.41CoO2·0.6H2O single crystals. We find an in-plane electronic scattering minimum near 11 K and a clear charge ordering at approximately 50 K. The electronic and magnetic properties in hydrated and nonhydrated Na0.41CoO2 samples are similar at higher temperature, but evolve in markedly different ways below ∼50 K, where a strong ferromagnetic tendency is observed in the hydrated sample. Model calculations show the relationship of this tendency to the structure of the Fermi surface. The results, particularly the clear differences between the hydrated and nonhydrated material show a substantially enhanced ferromagnetic tendency upon hydration. Implications for superconductivity are discussed.

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Держатели документа:
[Cao, Guixin
Gao, Yuze
Le Tacon, Mathieu
Lin, Chengtian] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany
[Cao, Guixin] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China
[Cao, Guixin] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
[Korshunov, Maxim M.] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
[Korshunov, Maxim M.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Korshunov, Maxim M.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Singh, David J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

Доп.точки доступа:
Cao, G. X.; Korshunov, M. M.; Коршунов, Максим Михайлович; Gao, Y. Z.; Le Tacon, M.; Singh, D. J.; Lin, C. T.
}
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13.

Application of inelastic electron scattering cross sections for quantitative analysis / A. S. Parshin [et al.] // Workshop "Trends in Nanomechanics and Nanoengineering" : book of abstracts / предс. сем. K. S. Aleksandrov ; зам. предс. сем.: G. S. Patrin, S. G. Ovchinnikov ; чл. лок. ком.: N. N. Kosyrev, A. S. Fedorov [et al]. - 2009. - P. 20

Материалы семинара

Доп.точки доступа:
Aleksandrov, K. S. \предс. сем.\; Александров, Кирилл Сергеевич; Patrin, G. S. \зам. предс. сем.\; Патрин, Геннадий Семёнович; Ovchinnikov, S. G. \зам. предс. сем.\; Овчинников, Сергей Геннадьевич; Kosyrev, N. N. \чл. лок. ком.\; Косырев, Николай Николаевич; Fedorov, A. S. \чл. лок. ком.\; Федоров, Александр Семенович; Parshin, A. S.; Kushenkov, S. A.; Aleksandrova, G. A.; Александрова, Галина Алексеевна; Dolbak, A. E.; Pchelyakov, O. P.; Olshanetsky, B. Z.; Ovchinnikov, S. G.; "Trends in Nanomechanics and Nanoengineering", workshop(2009 ; Aug. ; 24-28 ; Krasnoyarsk); Сибирский федеральный университет; Институт физики им. Л.В. Киренского Сибирского отделения РАН
}
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14.

Ovchinnikov, S. G.
Application of synchrotron radiation to the study of magnetic materials / S. G. Ovchinnikov // Uspekhi Fiz. Nauk. - 1999. - Vol. 169, Is. 8. - P. 869-887. - Cited References: 93 . - ISSN 0042-1294

РУБ Physics, Multidisciplinary
Рубрики:
X-RAY-SCATTERING
   RESONANCE EXCHANGE SCATTERING
   RARE-EARTH-METALS
   CIRCULAR-DICHROISM
   VALENCE STATES
   CO/PD(111) MULTILAYERS
   ABSORPTION-SPECTRA
   PHASE-TRANSITIONS
   SPIN POLARIZATION
   EDGE STRUCTURE
Аннотация: The recent results of the studies of magnetic materials using synchrotron irradiation are reviewed. The influence of magnetic effects on X-ray scattering is studied for linearly and circularly polarized photons, and effects of magnetic circular dichroism on the spectra of X-ray absorption and photoelectron emission are discussed. It is shown that X-ray magnetooptics techniques provide fine details of crystal and magnetic structures and also make it possible to separate the spin and orbital contributions to the total moment; to obtain element- and position-sensitive information on the magnetic properties of the material; to visualize domains and domain walls; and to probe magnetization reversal dynamics. A comparison of magnetic neutron and X-ray methods is given.

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

Доп.точки доступа:
Овчинников, Сергей Геннадьевич
}
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15.

    Bulgakov, E. N.
    Bloch bound states in the radiation continuum in a periodic array of dielectric rods / E. N. Bulgakov, A. F. Sadreev // Phys. Rev. A. - 2014. - Vol. 90, Is. 5. - Ст. 53801, DOI 10.1103/PhysRevA.90.053801. - Cited References: 35. - The work was supported by the Russian Science Foundation through Grant No. 14-12-00266. We acknowledge discussions with D. N. Maksimov. . - ISSN 1050-2947. - ISSN 1094-1622
   Перевод заглавия: Блоховские связанные состояния в радиационном континууме в периодической цепи диэлеткрических стержней

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
WAVE-GUIDE
   SCATTERING
   CYLINDERS
   CHANNEL
Аннотация: We consider an infinite periodic array of dielectric rods in vacuum with the aim to demonstrate three types of Bloch bound states in the continuum (BSCs): symmetry protected with a zero Bloch vector, embedded in one diffraction channel with nonzero Bloch vector, and embedded in two and three diffraction channels. The first and second types of the BSC exist for a wide range of material parameters of the rods, while the third occurs only at a specific value of the radius of the rods. We show that the second type supports the power flux along the array. In order to find BSCs we put forward an approach based on the expansion over the Hankel functions. We show how the BSC reveals itself in the scattering function when the singular BSC point is approached along a specific path in the parametric space.

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Доп.точки доступа:
Sadreev, E. N.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Russian Science Foundation [14-12-00266]
}
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16.

Bulgakov, E. N.
Bound States in Photonic Fabry-Perot Resonator Comprised of Two Nonlinear Off-Channel Defects / E. N. Bulgakov, A. F. Sadreev // JETP Letters. - 2009. - Vol. 90, Is. 12. - P. 744-749, DOI 10.1134/S0021364009240023. - Cited References: 32. - We thank Kostya Pichugin for many helpful discussions. The work was partially supported by the Russian Foundation for Basic Research, project no. 09-02-98005-Siberia. . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
SCATTERING-THEORY
   WAVE-GUIDE
   CONTINUUM
   MODES
Аннотация: Two off-channel nonlinear defects coupled to the photonic waveguide constitute the Fabry-Perot interfer-ometer (FPR). The defects are made from a Kerr-like nonlinear material. For the linear case such a FPR can support the bound states in the form of standing waves between the defects if the distance between them is quantized. For the nonlinear case the bound states appear for arbitrary distance between the defects however for an quantized electromagnetic intensity. For the transmission through FPR we reveal new resonances and show these are a result of coupling of the bound states with incident wave because of nonlinearity of the defects. The resonances are spaced at the eigen frequencies of bound states.

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Держатели документа:
[Bulgakov, E. N.
Sadreev, A. F.] Russian Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, E. N.] Siberian State Aerosp Univ, Krasnoyarsk, Russia
ИФ СО РАН
Institute of Physics, Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Russian Foundation for Basic Research [09-02-98005-Siberia]
}
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17.

    Bound states in the continuum in open acoustic resonators / A. A. Lyapina [et al.] // J. Fluid Mech. - 2015. - Vol. 780. - P. 370-387, DOI 10.1017/jfm.2015.480. - Cited References: 48. - This work has been supported by Russian Science Foundation through grant 14-12-00266. . - ISSN 0022-1120
   Перевод заглавия: Связанное состояние в континууме в открытом акустическом резонаторе

РУБ Mechanics + Physics, Fluids & Plasmas
Рубрики:
TRAPPED MODES
   FANO RESONANCES
   COMPLEX RESONANCES
   PARALLEL PLATES
   SIDE-BRANCHES
   WAVE-GUIDES
   ABSORPTION
   TRANSPORT
   CHANNELS
   SYSTEM
Кл.слова (ненормированные):
aeroacoustics -- noise control -- wave scattering
Аннотация: We consider bound states in the continuum (BSCs) or embedded trapped modes in two- and three-dimensional acoustic axisymmetric duct-cavity structures. We demonstrate numerically that, under variation of the length of the cavity, multiple BSCs occur due to the Friedrich-Wintgen two-mode full destructive interference mechanism. The BSCs are detected by tracing the resonant widths to the points of the collapse of Fano resonances where one of the two resonant modes acquires infinite life-time. It is shown that the approach of the acoustic coupled mode theory cast in the truncated form of a two-mode approximation allows us to analytically predict the BSC frequencies and shape functions to a good accuracy in both two and three dimensions. © 2015 Cambridge University Press.

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Держатели документа:
L.V. Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Lyapina, A. A.; Ляпина, Алина Андреевна; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович
}
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18.

Bound states in the continuum in open Aharonov-Bohm rings / E. N. Bulgakov [et al.] // JETP Letters. - 2006. - Vol. 84, Is. 8. - P. 430-435, DOI 10.1134/S0021364006200057. - Cited References: 33 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
WAVE-GUIDE
   QUANTUM
   TRANSMISSION
   SCATTERING
   BILLIARDS
   ELECTRON
Аннотация: Using the formalism of the effective Hamiltonian, we consider bound states in a continuum (BIC). They are nonhermitian effective Hamiltonian eigenstates that have real eigenvalues. It is shown that BICs are orthogonal to open channels of the leads, i.e., disconnected from the continuum. As a result, BICs can be superposed to a transport solution with an arbitrary coefficient and exist in a propagation band. The one-dimensional Aharonov-Bohm rings that are opened by attaching single-channel leads to them allow exact consideration of BICs. BICs occur at discrete values of the energy and magnetic flux; however, it's realization strongly depends on the way to the BIC point.

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Держатели документа:
Russian Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia
Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
ИФ СО РАН
Institute of Physics, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany

Доп.точки доступа:
Bulgakov, E. N.; Булгаков, Евгений Николаевич; Pichugin, K. N.; Пичугин, Константин Николаевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Rotter, I.
}
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19.

Bulgakov, E. N.
Bound states in the continuum in photonic waveguides inspired by defects / E. N. Bulgakov, A. F. Sadreev // Phys. Rev. B. - 2008. - Vol. 78, Is. 7. - Ст. 75105, DOI 10.1103/PhysRevB.78.075105. - Cited References: 53 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
SCATTERING-THEORY
   NUCLEAR REACTIONS
   UNIFIED THEORY
   TRANSMISSION
   ELECTRON
   MODEL
Аннотация: Photonic crystal with defect layer forms directed continuum for electromagnetic waves. Defect rods in the vicinity of the defect layer interact with the continuum and give rise to scattering of ingoing waves. We derive quantum-mechanical analog of the non-Hermitian Hamiltonian of the open system with complex eigenvalues, which describes a scattering of electromagnetic waves by the defect rods. In this formalism a bound state in the continuum (BIC) can be easily found by the condition that one of the complex eigenvalues becomes real for variation of dielectric constant of the defect rods. We numerically find BICs with discrete frequencies belong to the continuum for different arrangements of the defects and show that they are localized around the defects.

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Держатели документа:
[Bulgakov, Evgeny N.
Sadreev, Almas F.] Russian Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Institute of Physics, Academy of Sciences, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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20.

Characterization of bio-synthesized nanoparticles produced by Klebsiella oxytoca / L. Anghel [et al.] // Journal of Physics: Conference Series. - 2012. - Vol. 351, Is. 1. - Ст. 012005. - P. , DOI 10.1088/1742-6596/351/1/012005 . - ISSN 1742-6588
Кл.слова (ненормированные):
Absorption peaks -- Biominerals -- Chemical compositions -- Exopolysaccharides -- Ferrihydrites -- Fitting procedure -- FTIR spectroscopy -- Klebsiella oxytoca -- Model calculations -- Morphological analysis -- Radius of gyration -- Scattering objects -- Small angle X-ray scattering -- Structural and morphological properties -- Structural investigation -- UV-vis spectroscopy -- Water dispersion -- Water-dispersed -- Experiments -- Nanoparticles -- Polysaccharides -- Raman spectroscopy -- Scattering -- Ultraviolet visible spectroscopy -- Synthesis (chemical)
Аннотация: Structural and morphological properties of biogenic ferrihydrite nanoparticles produced by bacteria Klebsiella oxytoca are investigated. The stability of water dispersions of biomineral particles produced by Klebsiella oxytoca was monitored by UV-Vis spectroscopy. Their chemical composition was determined by FT-IR spectroscopy. The vibrational spectra of biogenic ferrihydrite nanoparticles revealed typical absorption peaks of exopolysaccharides. Morphological analysis based on Raman spectroscopy indicated the presence of exopolysaccharides on the surface as well as inside the pores of the ferrihydrite nanoparticles. Structural investigations of ultrasonic assisted samples of different concentration of water dispersed particles were performed using small angle X-ray scattering analysis. Model calculations and fitting procedures revealed scattering objects of an elongated shape with 6.73В±0.16 nm radius of gyration. В© Published under licence by IOP Publishing Ltd.

Scopus

Доп.точки доступа:
Anghel, L.; Balasoiu, M.; Ishchenko, L. A.; Stolyar, S. V.; Столяр, Сергей Викторович; Kurkin, T. S.; Rogachev, A. V.; Kuklin, A. I.; Kovalev, Yu.S.; Raikher, Yu.L.; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Duca, G.; International Workshop on SANS-YuMO User Meeting at the Start-up of Scientific Experiments on the IBR-2M Reactor: Devoted to the 75th Anniversary of Yu M Ostanevich's Birth(2 ; Dubna)(27 May 2011 - 30 May 2011)
}
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