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1.
Alekseev, K. N.
Strange attractor in resonant tunneling / K. N. Alekseev, G. P. Berman, D. K. Campbell> // Phys. Rev. B. - 1998. -
Vol. 58
,
Is. 7
. - P. 3954-3962,
DOI
10.1103/PhysRevB.58.3954. - Cited References: 38 . - ISSN 0163-1829
РУБ
Physics, Condensed Matter
Рубрики:
INTRINSIC BISTABILITY
RING CAVITY
OPTICAL TURBULENCE
TRANSMITTED LIGHT
QUANTUM-WELLS
OSCILLATIONS
BARRIERS
SYSTEM
STATE
TIME
Аннотация:
We consider the process of resonant electron tunneling through a double-barrier potential, taking into account nonlinear dynamical effects generated by charge accumulation in the interbarrier space. We use the perturbation approach of Davydov and Ermakov, which was developed for investigating intrinsic bistability in resonant tunneling. For incoming electron flow, which is modulated slowly in time, we show that the resulting nonlinear dynamics can become chaotic, with the chaos described (because of the open nature of the
system
) by a strange attractor. We determine the conditions for the existence of this strange attractor and estimate characteristic experimental parameters for its observation.
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Держатели документа:
LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
Univ Calif Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545 USA
Univ Illinois, Dept Phys, Urbana, IL 61801 USA
ИФ СО РАН
Доп.точки доступа:
Berman, G. P.; Campbell, D. K.
}
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2.
Altunin, R. R.
Structural phase transformations in Al/Pt bilayer thin films during the solid-state reaction / R. R. Altunin, E. T. Moiseenko, S. M. Zharkov> // Phys. Solid State. - 2018. -
Vol. 60
,
Is. 7
. - P. 1413-1418,
DOI
10.1134/S106378341807003X. - Cited References: 26. - This study was supported by the Russian Foundation for Basic Research, project no. 16-33-00475 mol_a. . - ISSN 1063-7834. - ISSN 1090-6460
РУБ
Physics, Condensed Matter
Рубрики:
AL
SYSTEM
MULTILAYERS
ALUMINUM
HEAT
Аннотация:
A sequence of phases forming during the solid-phase reaction in Al/Pt bilayer thin films has been investigated by in situ electron diffraction. It is shown that the amorphous PtAl2 phase forms first during the solid-phase reaction initiated by heating. Upon further heating, PtAl2, Pt2Al3, PtAl, and Pt3Al crystalline phases sequentially form, which is qualitatively consistent with an effective formation heat model. The content of phases forming during the reaction has been quantitatively analyzed and the structural phase transformations have been examined.
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Публикация на русском языке
Алтунин, Роман Русланович. Структурные фазовые превращения при твердофазной реакции в тонких двухслойных пленках Al/Pt [Текст] / Р. Р. Алтунин, Е. Т. Моисеенко, С. М. Жарков // Физ. тверд. тела. - 2018. - Т. 60 Вып. 7. - С. 1397–1402
Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Moiseenko, E. T.; Zharkov, S. M.; Жарков, Сергей Михайлович; Russian Foundation for Basic Research [16-33-00475 mol_a]
}
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3.
Arkhipkin, V. G.
Switching from normal to anomalous dispersion in photonic crystal with Raman gain defect / V. G. Arkhipkin, S. A. Myslivets> // Opt. Lett. - 2014. -
Vol. 39
,
Is. 7
. - P. 1803-1806,
DOI
10.1364/OL.39.001803. - Cited References: 30. - This work was supported in part by the RAS Grants No. 24.29 and No. 24.31, by SB RAS Grants No. 43, No. 101, and by NSC of Taiwan and SB RAS through a joint project. . - ISSN 0146-9592. - ISSN 1539-4794
РУБ
Optics
Рубрики:
FAST LIGHT-PROPAGATION
SLOW LIGHT
SUPERLUMINALITY
AMPLIFIER
CAVITY
SYSTEM
DELAY
Аннотация:
Propagation of a light through a one-dimensional photonic crystal containing a defect layer doped with a Raman gain medium is discussed. We demonstrate all-optically controlled switching from normal to anomalous dispersion in such a structure. A group delay for the transmitted probe (Raman) pulse is investigated. We show that the group velocity of a Raman pulse can be tuned from subluminal to superluminal by varying the intensity of the pump field. (C) 2014 Optical Society of America
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Доп.точки доступа:
Myslivets, S. A.; Мысливец, Сергей Александрович; Архипкин, Василий Григорьевич
}
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4.
Aver'yanov, E. M.
Fluctuations of orientational order in a uniaxial nematic liquid crystal with biaxial molecules and its response to an external field / E. M. Aver'yanov> // Phys. Solid State. - 2003. -
Vol. 45
,
Is. 5
. - P. 990-1001,
DOI
10.1134/1.1575350. - Cited References: 30 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
PHASE-TRANSITION
SMECTIC-A
PARTICLES
SYSTEM
LANDAU
MODEL
Аннотация:
Homogeneous thermal fluctuations of the orientational order parameters S and G of biaxial molecules in a uniaxial nematic liquid crystal are investigated in the framework of the molecular-statistical theory. It is demonstrated that the molecular biaxiality significantly affects the order parameters S and G, their temperature dependences in the nematic phase, the amplitude and the temperature dependence of the order parameter fluctuations in the nematic and isotropic phases, and the character of the transition from the nematic phase to the isotropic liquid phase. It is established that the fluctuations of the parameters S and G in the nematic phase are related to the temperature dependences of S and G and the susceptibilities chi(S) and chi(G) of the nematic liquid crystal to external fields, which leads to a change in the parameters S and G at a fixed director orientation. Explanations are offered for the known experimental data on the orientational ordering of biaxial molecules under the action of external fields in the isotropic phase of nematic liquid crystals. (C) 2003 MAIK "Nauka/Interperiodica".
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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:
Аверьянов, Евгений Михайлович
}
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5.
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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6.
Bulgakov, E. N.
All-optical manipulation of light in X- and T-shaped photonic crystal waveguides with a nonlinear dipole defect / E. N. Bulgakov, A. F. Sadreev> // Phys. Rev. B. - 2012. -
Vol. 86
,
Is. 7
. - Ст. 75125,
DOI
10.1103/PhysRevB.86.075125. - Cited References: 38. - The work is partially supported by Integration Project of Siberian Branch of RAS (Project No. 29) and RFBR Grant No. 12-02-000094. We thank D. N. Maksimov for critical reading of the manuscript. . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
SPONTANEOUS SYMMETRY-BREAKING
FIBER
CAVITIES
SYSTEM
FIELDS
Аннотация:
We consider light transmission in X- and T-shaped photonic crystal waveguides which hold nonlinear defect with two resonant dipole modes. By use of the coupled-mode theory and by numerical solution of the Maxwell equations for the transverse-magnetic (TM) light mode, we show two stable types of the solutions. The first type has no cross talk, while the second type does owe to nonlinearity of the defect. We show also that direct path transmission processes in the waveguides play an important role for breaking of symmetry.
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Держатели документа:
[Bulgakov, Evgeny N.
Sadreev, Almas F.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny N.] Siberian State Aerosp Univ, Krasnoyarsk, Russia
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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7.
Bulgakov, E. N.
Switching through symmetry breaking for transmission in a T-shaped photonic waveguide coupled with two identical nonlinear micro-cavities / E. . Bulgakov, A. . Sadreev> // J. Phys.: Condens. Matter. - 2011. -
Vol. 23
,
Is. 31
. - Ст. 315303,
DOI
10.1088/0953-8984/23/31/315303. - Cited References: 32 . - ISSN 0953-8984
РУБ
Physics, Condensed Matter
Рубрики:
MODE THEORY
NUCLEAR REACTIONS
UNIFIED THEORY
FIBER
INSTABILITIES
RESONANCE
GRATINGS
SYSTEM
STATES
Кл.слова (ненормированные):
All-optical switching
--
Anti-symmetric
--
Central waveguides
--
Coupled mode theory
--
Input power
--
Input pulse
--
Mirror symmetry
--
Nonlinear cavities
--
Output waveguides
--
Photonic waveguides
--
Standing wave
--
Symmetry-breaking
--
Microcavities
--
Mirrors
--
Waveguides
--
Light transmission
Аннотация:
Using coupled mode theory we consider transmission in a T-shaped waveguide coupled with two identical symmetrically positioned nonlinear micro-cavities with mirror symmetry. For input power injected into the central waveguide we show the existence of a symmetry breaking solution which is a result of mixing of the symmetrical input wave with an antisymmetric standing wave in the Fabry-Perot interferometer. With growth of the input power, a feature in the form of loops arises in the solution which originates from bistability in the transmission in the output left/right waveguide coupled with the first/second nonlinear cavity. The domains of stability of the solution are found. The breaking of mirror symmetry gives rise to nonsymmetrical left and right outputs. We demonstrate that this phenomenon can be explored for all-optical switching of light transmission from the left output waveguide to the right one by application of input pulses.
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Держатели документа:
[Bulgakov, Evgeny
Sadreev, Almas] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny] Siberian State Aerosp Univ, Krasnoyarsk, Russia
ИФ СО РАН
Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Siberian State Aerospace University, Krasnoyarsk Rabochii, Krasnoyarsk 31, Russian Federation
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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8.
Bulgakov, E. N.
Symmetry breaking in a T-shaped photonic waveguide coupled with two identical nonlinear cavities / E. . Bulgakov, A. . Sadreev> // Phys. Rev. B. - 2011. -
Vol. 84
,
Is. 15
. - Ст. 155304,
DOI
10.1103/PhysRevB.84.155304. - Cited References: 40. - A.S is grateful to Boris Malomed for fruitful discussions about symmetry breaking. The work is partially supported by RFBR grant 12-02-00483. . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
MODE THEORY
NUCLEAR REACTIONS
UNIFIED THEORY
SYSTEM
FIBER
RESONANCE
DYNAMICS
STATES
Аннотация:
We consider light transmission in a T-shaped photonic waveguide coupled with two identical symmetrically positioned nonlinear microcavities. We present two types of symmetry breaking. The first one is a result of mixing of the symmetric input wave with antisymmetric bound states in the Fabry-Perot interferometer architecture. Similarly, the second mechanism of the symmetry breaking is the result of mixing the symmetrical input wave with the antibonding bound state in a straight waveguide coupled with two cavities positioned perpendicular to the waveguide. In both cases the mixing is due to nonlinearity. In turn, the symmetry-breaking solutions give rise to nonsymmetrical outputs in the T-shape waveguide. These effects are directly demonstrated by the electromagnetic field solutions which are complimented by coupled mode theory for the light transmission.
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Держатели документа:
[Bulgakov, Evgeny
Sadreev, Almas] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny] Siberian State Aerosp Univ, Krasnoyarsk, Russia
ИФ СО РАН
Kirensky Institute of Physics, 660036, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk Rabochii, 31, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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9.
Crystal and local
atomic structure of MgFeBO4,Mg0.5Co0.5FeBO4, and CoFeBO4: effects of Co substitution / N. V. Kazak [et al.]> // Phys. Status Solidi B. - 2015. -
Vol. 252
,
Is. 10
. - P. 2245-2258,
DOI
10.1002/pssb.201552143. - Cited References: 46. - This work has been financed by the MECOM Project MAT11/23791, and DGA IMANA project E-34, Council for Grants of the President of the Russian Federation (project nos. NSh-2886.2014.2, SP-938.2015.5), and Russian Foundation for Basic Research (project nos. 13-02-00958-a, 13-02-00358-a, 14-02-31051-mol-a). The work of one of the coauthors (M.S.P.) was supported by the program of Foundation for promoting the development of small enterprises in scientific and technical sphere ("UMNIK" program). . - ISSN 0370. - ISSN 1521-3951
Перевод заглавия:
Кристаллическая и локальная атомная структура MgFeBO4, Mg0.5Co0.5FeBO4 and CoFeBO4: эффект замещения Со
РУБ
Physics, Condensed Matter
Рубрики:
SPIN-GLASS BEHAVIOR
MAGNETIC WARWICKITES
SINGLE-CRYSTALS
PHASE-RELATIONS
OXYBORATE
SYSTEM
SPECTROSCOPY
ANISOTROPY
MN2OBO3
FE2OBO3
Кл.слова (ненормированные):
crystal structure
--
XANES
--
EXAFS
--
magnetic semiconductor
--
oxyborate
Аннотация:
Single-crystalline MgFeBO4, Mg0.5Co0.5FeBO4, and CoFeBO4 have been grown by the flux method. The samples have been characterized by X-ray spectral analysis, X-ray diffraction, and X-ray absorption spectroscopy. The X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectra have been measured at the Fe and Co K-edges over a wide temperature range (6.5– 300 K). The composition, the charge state, and local environ- ment of both Fe and Co atoms have been determined. The effects of Co substitution for Mg on the local structural distortions have been revealed experimentally and the M–O bond anisotropy has been found.
Монокристаллические образцы CoFeBO4 были выращены раствор-расплавным методом. Образцы были охарактеризованы с помощью рентгеноспектрального анализа, рентгеновской дифракции и спектроскопии поглощения рентгеновских лучей. Спектры вблизи K-края поглощения рентгеновского излучения структуры (XANES) и далее рентгеновского поглощения тонкой структуры (EXAFS) были измерены для Fe и Co в широком диапазоне температур (6.5- 300К). Состав, состояние заряда, и локальная положение и Fe и Co атомов были определены. Эффекты замещения Co магнием Mg на местные структурные искажения были выявлены экспериментально и анизотропия связи М-О была найдена.
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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
National Research Center Kurchatov Institute, Moscow, Russian Federation
Servicio de Medidas Fi, sicas, Universidad de Zaragoza, Zaragoza, Spain
Departamento de Fisica de la Materia Condensada, Instituto de Ciencia de Materiales de Aragon, CSIC, Universidad de Zaragoza, Zaragoza, Spain
O. O. Galkin Institute for Physics and Engineering, National Academy of Sciences of Ukraine, Donetsk, Ukraine
Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Platunov, M. S.; Платунов, Михаил Сергеевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Ivanova, N. B.; Иванова, Наталья Борисовна; Zubavichus, Y. V.; Veligzhanin, A. A.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Arauzo, A.; Bartolome, J.; Lamonova, K. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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10.
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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11.
Effect of heterovalent
substitution of rare-earth elements on the magnetic and transport properties of YBa2Cu3O7 / M. I. Petrov [et al.]> // Phys. Solid State. - 2007. -
Vol. 49
,
Is. 11
. - P. 2047-2051,
DOI
10.1134/S1063783407110054. - Cited References: 18 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
PR
SUPERCONDUCTIVITY
CE
ND
TRANSITION
SYSTEM
LA
Аннотация:
The Y(1-x) Ce (x) Ba2Cu3O7
system
with low cerium concentrations has been synthesized. The cerium solubility limit measured using x-ray powder diffraction analysis is about 2.4 at. %. The temperature dependences of the magnetization M(T) are measured for samples cooled in a magnetic field (FC) and in a zero field (ZFC). The difference between the magnetizations M-ZFC-M-FC at 77.4 K, which is proportional to the pinning potential, passes through a maximum at x = 0.0156. This concentration corresponds to the average distance (equal to eight lattice constants) between the impurity ions in the plane of the rare-earth elements, which is comparable to the diameter of Abrikosov vortices in YBa2Cu3O7.
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, 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:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Gokhfel'd, Yu. S.; Гохфельд, Юлия Сергеевна; Dubrovskii, A. A.; Дубровский, Андрей Александрович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович
}
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12.
Effect of impurities
on the successive phase transitions in (Cs1-xRbx)(2)ZnI4 compounds / I. P. Aleksandrova [et al.]> // J. Phys.: Condens. Matter. - 2002. -
Vol. 14
,
Is. 49
. - P. 13623-13634,
DOI
10.1088/0953-8984/14/49/316. - Cited References: 27 . - ISSN 0953-8984
РУБ
Physics, Condensed Matter
Рубрики:
X-RAY
CS2ZNI4
SYSTEM
HEAT
Кл.слова (ненормированные):
Phase transitions
--
Point defects
--
Specific heat
--
Temperature
--
X ray diffraction analysis
--
Zinc compounds
--
Lock-in transition
--
Nuclear quadrupole resonance
--
Single crystals
Аннотация:
The heat capacity, nuclear quadrupole resonance (NQR) and x-ray diffraction of (Cs1-xRbx)(2)ZnI4 single crystals have been measured, for x = 0, 0.001, 0.005, 0.01, 0.025 and 0.05. The normal to incommensurate (N-Inc) phase transition at T-I, the incommensurate to commensurate (Inc-C) lock-in transition at T-L and the structural commensurate monoclinic to triclinic transition at T-LT, observed in the parent compound (x = 0), takes place for x = 0, 0.001, 0.005 and 0.01. For x = 0.025 only T-I and T-L are detected, while for x = 0.05 no transitions were observable. The values of T-I and T-L increase with x while T-LT decreases and disappears at the concentration x = 0.025. The effect of defects, besides modifying the transition temperatures, is that of broadening and lowering the heat capacity anomaly at the lock-in transition until its total quenching for x = 0.05. No observable hysteresis is detected in this transition. NQR and x-ray diffraction data show the Inc-C transition up to the highest concentration. We conclude that this phenomenology is caused by weak interaction of the incommensurate modulation with point defects even in the region close to the Inc-C transition.
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain
ИФ СО РАН
L V Kirenski Institute of Physics, Russian Academy of Sciences, Siberian Branch, 660036 Krasnoyarsk, Russian Federation
Inst. de Ciencia de Mat. de Aragon, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
Доп.точки доступа:
Aleksandrova, I. P.; Александрова, Инга Петровна; Bartolome, J.; Falvello, L. R.; Torres, J. M.; Sukhovskii, A. A.; Суховский, Андрей Андреевич
}
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13.
Electronic structure of
β-RbNd(MoO4)2 by XPS and XES / V. V. Atuchin [et al.]> // J. Phys. Chem. Solids. - 2015. -
Vol. 77
. - P. 101-108,
DOI
10.1016/j.jpcs.2014.09.012. - Cited References: 52. - This study was partially supported by the Ministry of Education and Science of the Russian Federation and RFBR Grant 12-02-90806-mol_rf_nr. . - ISSN 0022-3697
Перевод заглавия:
Электронная структура b-RbNd(MoO4)2, исследованная при помощи РФЭС и РСМА
РУБ
Chemistry, Multidisciplinary + Physics, Condensed Matter
Рубрики:
RAY-EMISSION-SPECTROSCOPY
CRYSTAL-STRUCTURE
PHOTOELECTRON-SPECTROSCOPY
LUMINESCENCE PROPERTIES
VIBRATIONAL PROPERTIES
PHOTOEMISSION SPECTRA
OPTICAL-PROPERTIES
TERNARY MOLYBDATE
AB-INITIO
SYSTEM
Кл.слова (ненормированные):
Inorganic compounds
--
Chemical synthesis
--
Photoelectron spectroscopy
--
X-ray diffraction
--
Electronic structure
Аннотация:
β-RbNd(MoO4)2 microplates have been prepared by the multistage solid state synthesis method. The phase composition and micromorphology of the final product have been evaluated by XRD and SEM methods. The electronic structure of β-RbNd(MoO4)2 molybdate has been studied employing the X-ray photoelectron spectroscopy (XPS) and X-ray emission spectroscopy (XES). For the molybdate, the XPS core-level and valence-band spectra, as well as XES bands representing energy distribution of the Mo 4d- and O 2p-like states, have been measured. It has been established that the O 2p-like states contribute mainly to the upper portion of the valence band with also significant contributions throughout the whole valence-band region. The Mo 4d-like states contribute mainly to a lower valence band portion
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Держатели документа:
SB RAS, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia
Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia
Novosibirsk State Univ, Lab Semicond & Dielect Mat, Novosibirsk 630090, Russia
Natl Acad Sci Ukraine, Frantsevich Inst Problems Mat Sci, UA-03142 Kiev, Ukraine
SB RAS, Baikal Inst Nat Management, Lab Oxide Syst, Ulan Ude 670047, Russia
SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia
SB RAS, Inst Semicond Phys, Lab Nanodiagnost & Nanolithog, Novosibirsk 630090, Russia
Доп.точки доступа:
Atuchin, V. V.; Khyzhun, O. Y.; Chimitova, O. D.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Gavrilova, T. A.; Bazarov, B. G.; Bazarova, J. G.; Ministry of Education and Science of the Russian Federation; RFBR [12-02-90806-mol_rf_nr]
}
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14.
Formation of ferromagnetic
germanides by solid-state reactions in 20Ge/80Mn films / V. G. Myagkov [et al.]> // Thin Solid Films. - 2014. -
Vol. 552
. - P. 86-91,
DOI
10.1016/j.tsf.2013.12.029. - Cited References: 53 . - ISSN 0040-6090
РУБ
Materials Science, Multidisciplinary + Materials Science, Coatings & Films + Physics, Applied + Physics, Condensed Matter
Рубрики:
PHASE-FORMATION
MAGNETIC-PROPERTIES
Mn5Ge3 FILMS
X-RAY
Ge(111)
TRANSFORMATIONS
DIFFUSION
SPECTRA
SYSTEM
LAYERS
Кл.слова (ненормированные):
Manganite-germanium
--
Solid state reaction
--
First phase
--
Mn5Ge3 alloy
--
Carbon impurity
--
Oxygen impurity
--
Annealing
--
Magnetic anisotropy
Аннотация:
Solid state reactions between Ge and Mn films are systematically examined using X-ray diffraction, photoelectron spectroscopy, and magnetic and electrical measurements. The films have a nominal atomic ratio Ge:Mn = 20:80 and are investigated at temperatures from 50 to 500 °C. It is established that after annealing at ~ 120°C, the ferromagnetic Mn5Ge3 phase is the first phase to form at the 20Ge/80Mn interface. As the annealing temperature increases to 300°C, the weak magnetic Mn5Ge 2 + Mn3Ge phases simultaneously begin to grow and they become dominant at 400°C. Increasing the annealing temperature to 500°C leads to the formation of the ferromagnetic phase with a Curie temperature TC ~ 350-360 K and magnetization 14-25 kA/m at room temperature. The X-ray diffraction study of the samples shows the reflections from the Mn 5Ge3 phase, and the photoelectron spectra contain the oxygen and carbon peaks. The homogeneous distribution of oxygen and carbon over the sample thickness suggests that the increased Curie temperature and magnetization are related to the migration of C and O atoms into the Mn 5Ge3 lattice and the formation of the Nowotny phase Mn5Ge3CxOy. The initiation temperature (~ 120 C) is the same in the Mn5Ge3 phase with the solid-state reactions in the Ge/Mn films as well as in the phase separation in the GexMn1 - x diluted semiconductors. Thus, we conclude that the synthesis of the Mn5Ge3 phase is the moving force for the spinodal decomposition of the GexMn 1 - x diluted semiconductors.
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660049, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Myagkov, V. G.; Мягков, Виктор Григорьевич; Zhigalov, V. S.; Жигалов, Виктор Степанович; Matsynin, A. A.; Мацынин, Алексей Александрович; Bykova, L. E.; Быкова, Людмила Евгеньевна; Mikhlin, Y. L.; Bondarenko, G. N.; Бондаренко, Галина Николаевна; Patrin, G. S.; Патрин, Геннадий Семёнович; Yurkin, G. Yu.; Юркин, Глеб Юрьевич
}
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15.
Heat capacity and
thermodynamic properties of HoMnO3 in the range of 364–1046 K / L. T. Denisova [et al.]> // Phys. Solid State. - 2016. -
Vol. 58
,
Is. 3
. - P. 481-484,
DOI
10.1134/S1063783416030070. - Cited References:27 . - ISSN 1063-7834. - ISSN 1090-6460
РУБ
Physics, Condensed Matter
Рубрики:
High-temperature
Rare-earth
YMnO3
Oxides
System
Аннотация:
The temperature dependence of the molar heat capacity of HoMnO3 has been measured by differential scanning calorimetry. The experimental data have been used to calculate the thermodynamic properties of the oxide compound (changes in the enthalpy H°(T)–H°(364 K), entropy S°(T)–S°(364 K), and reduced Gibbs energy Φ°(T)). The data on the heat capacity of HoMnO3 have been generalized in the range of 40–1000 K.
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Публикация на русском языке
Теплоемкость и термодинамические свойства HoMnO3 в области 364-1046 K [Текст] / Л. Т. Денисова [и др.] // Физ. тверд. тела : Физико-технический институт им. А. Ф. Иоффе РАН, 2016. - Т. 58 Вып. 3. - С. 469-472
Держатели документа:
Siberian Fed Univ, Svobodnyi Pr 79, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Akademgorodok 50, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Denisova, L. T.; Chumilina, L. G.; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Patrin, G. S.; Патрин, Геннадий Семёнович; Denisov, V. M.
}
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16.
High-temperature heat capacity
of copper metaborate CuB2O4 / V. M. Denisov [et al.]> // Phys. Solid State. - 2012. -
Vol. 54
,
Is. 10
. - P. 2142-2144,
DOI
10.1134/S1063783412100113. - Cited References: 17 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
SINGLE-CRYSTALS
MAGNETIC-PROPERTIES
SYSTEM
OXIDES
Аннотация:
The heat capacity of copper metaborate CuB2O4 has been measured over a wide temperature range. A correlation between the composition of the CuO-B2O3
system
and the heat capacity of the oxide compounds has been found.
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Публикация на русском языке
Высокотемпературная теплоемкость метабората меди CuB2O4 // Физика твердого тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54, № 10. - С. 2012-2014. - ISSN 0367-3294
Держатели документа:
[Denisov, V. M.
Denisova, L. T.
Irtyugo, L. A.
Chumilina, L. G.] Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Krasnoyarsk 660025, Russia
[Volkov, N. V.
Patrin, G. S.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Volkov, N. V.
Patrin, G. S.] Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Denisov, V. M.; Denisova, L. T.; Irtyugo, L. A.; Volkov, N. V.; Волков, Никита Валентинович; Patrin, G. S.; Патрин, Геннадий Семёнович; Chumilina, L. G.
}
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17.
High-temperature heat capacity
of the BiFeO3 multiferroic / V. M. Denisov [et al.]> // Phys. Solid State. - 2012. -
Vol. 54
,
Is. 6
. - P. 1312-1314,
DOI
10.1134/S1063783412060108. - Cited References: 27 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
STRUCTURAL-CHARACTERIZATION
SINGLE-CRYSTALS
FEATURES
SYSTEM
RANGE
Аннотация:
Data on the heat capacity of the BiFeO3 multiferroic have been obtained within a broad temperature interval. Correlation has been established between the composition of the Bi2O3-Fe2O3 pseudobinary
system
and the specific heat capacity of the oxide compounds.
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Публикация на русском языке
Высокотемпературная теплоемкость мультиферроика BiFeO3 // Физика твердого тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54, N 6. - С. 1234-1236. - ISSN 0367-3294
Держатели документа:
[Denisov, V. M.
Irtyugo, L. A.
Denisova, L. T.] Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Krasnoyarsk 660025, Russia
[Volkov, N. V.
Patrin, G. S.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Volkov, N. V.
Patrin, G. S.] Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660074, Russia
Доп.точки доступа:
Denisov, V. M.; Денисов, Виктор Михайлович; Volkov, N. V.; Волков, Никита Валентинович; Irtyugo, L. A.; Patrin, G. S.; Патрин, Геннадий Семёнович; Denisova, L. T.
}
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18.
High-temperature heat capacity
of Y2.93Ho0.07Fe5O12 / V. M. Denisov [et al.]> // Phys. Solid State. - 2012. -
Vol. 54
,
Is. 11
. - P. 2205-2207,
DOI
10.1134/S1063783412110078. - Cited References: 28 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
PHYSICAL-PROPERTIES
SYSTEM
OXIDES
Аннотация:
This paper presents data on the heat capacity of Y2.93Ho0.07Fe5O12 obtained in the temperature range 343-1000 K. A correlation between the composition of the Fe2O3-Y2O3 pseudobinary
system
and the specific heat capacity of oxide compounds is pointed out.
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Высокотемпературная теплоемкость Y2.93Ho0.07Fe5O12 // Физика твердого тела : Издательство "Наука", 2012. - Т. 54, N 11. - С. 2073-2075. - ISSN 0367-3294
Держатели документа:
Denisov, V. M.
Denisova, L. T.
Irtyugo, L. A.
Chumilina, L. G.] Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Krasnoyarsk 660025, Russia
Patrin, G. S.
Volkov, N. V.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Denisov, V. M.; Denisova, L. T.; Irtyugo, L. A.; Patrin, G. S.; Патрин, Геннадий Семёнович; Volkov, N. V.; Волков, Никита Валентинович; Chumilina, L. G.
}
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19.
High-temperature superconductor based
composites: Large magnetoresistance in weak magnetic fields / D. A. Balaev [et al.]> // Tech. Phys. Lett. - 2001. -
Vol. 27
,
Is. 11
. - P. 952-955,
DOI
10.1134/1.1424404. - Cited References: 16 . - ISSN 1063-7850
РУБ
Physics, Applied
Рубрики:
CRITICAL CURRENTS
APPLICABILITY
TRANSITION
TRANSPORT
SYSTEM
CUO
Аннотация:
It was found that high-temperature superconductor (HTSC) based composites of the 1-2-3 (YBCO) + dielectric and YBCO + normal metal types exhibit large magnetoresistances in weak magnetic fields in a broad temperature range. This behavior is qualitatively explained using the concept of the irreversibility line in HTSCs and the mechanism of thermal fluctuations in the network of weak bonds of the Josephson type realized in HTSC composites. The HTSC-based composites exhibit a much higher sensitivity (as compared to that in the usual HTSC ceramics) to weak magnetic fields (below 300 Oe) at liquid-nitrogen temperatures, which is important for practical applications. (C) 2001 MAIK "Nauka /Interperiodica".
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk, Russia
Siberian Aerosp Acad, Krasnoyarsk, Russia
Krasnoyarsk State Univ, Krasnoyarsk, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Aerospace Academy, Krasnoyarsk, Russian Federation
Krasnoyarsk State University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Gohfeld, D. M.; Popkov, S. I.; Попков, Сергей Иванович; Saihutdinov, K. A.; Petrov, M. I.; Петров, Михаил Иванович
}
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20.
Ignatchenko, V. A.
Spectral properties of waves in superlattices with 2D and 3D inhomogeneities / V. A. Ignatchenko, D. S. Tsikalov> // J. Exp. Theor. Phys. - 2011. -
Vol. 113
,
Is. 2
. - P. 232-244,
DOI
10.1134/S1063776111080061. - Cited References: 24. - This study was supported in part by the program of the Presidium of the Russian Academy of Sciences (grant no. 27.1), Federal Targeted Program (State contract no. 02.740.11.0220), and Targeted Programs "Development of the Higher School Scientific Potential" in 2009-2010 and 2011 years. . - ISSN 1063-7761
Рубрики:
X-RAY REFLECTION
PERTURBED FIELDS
MULTILAYERS
SUSCEPTIBILITY
PROPAGATION
INTERFACES
SCATTERING
SYSTEM
Аннотация:
We investigate the dynamic susceptibility and one-dimensional density of states in an initially sinusoidal superlattice containing simultaneously 2D phase inhomogeneities simulating correlated rough-nesses of superlattice interfaces and 3D amplitude inhomogeneities of the superlattice layer materials. The analytic expression for the averaged Green's function of the sinusoidal superlattice with two phase inhomogeneities is derived in the Bourret approximation. It is shown that the effect of increasing asymmetry in the peak heights of dynamic susceptibility at the Brillouin zone boundary of the superlattice, which was discovered earlier [15] upon an increase in root-mean-square (rms) fluctuations, also takes place upon an increase in the correlation wavenumber of inhomogeneities. However, the peaks in this case also become closer, and the width and depth of the gap in the density of states decrease thereby. It is shown that the enhancement of rms fluctuations of 3D amplitude inhomogeneities in a superlattice containing 2D phase inhomogeneities suppresses the effect of dynamic susceptibility asymmetry and leads to a slight broadening of the gap in the density of states and a decrease in its depth. Targeted experiments aimed at detecting the effects studied here would facilitate the development of radio-spectroscopic and optical methods for identifying the presence of inhomogeneities of various dimensions in multilayer magnetic and optical structures.
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Держатели документа:
[Ignatchenko, V. A.
Tsikalov, D. S.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич
}
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