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Anharmonic thermal atomic vibrations in the cubic phase of Cs//2NaNdCl//6 single crystals. / I. P. Makarova [et al.] // Phys Status Solidi B. - 1984. - Vol. 121, Is. 2. - P. 481-486 . - ISSN 0370-1972
Кл.слова (ненормированные):
CRYSTALS -- X-RAYS - Diffraction -- ANHARMONIC THERMAL ATOMIC VIBRATIONS -- CUBIC PHASE -- PHASE TRANSITIONS -- CESIUM COMPOUNDS
Аннотация: Thermal atomic vibrations in the cubic phase of Cs//2NaNdCl//6 single crystal undergoing the structural phase transition (PT) at 138 K are investigated from the data of X-ray diffraction obtained at 278, 218, and 148 K. A significant anisotropy of thermal vibrations and their deviations from harmonic behavior are found for the Cl-atoms of the structure. These atoms displace from their equilibrium positions below PT due to the tilts of the octahedral groups.

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Держатели документа:
Acad of Sciences of the USSR, A. V., Shubnikov Inst of Crystallography,, Moscow, USSR, Acad of Sciences of the USSR, A. V. Shubnikov Inst of Crystallography, Moscow, USSR

Доп.точки доступа:
Makarova, I. P.; Misyul, S. V.; Мисюль, Сергей Валентинович; Muradyan, L. A.; Bovina, A. F.; Бовина, Ася Федоровна; Simonov, V. I.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
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Ferromagnetic and spin-wave resonance in exchange-coupled NiFe/Ag/NiFe three-layer structures / R. S. Iskhakov [et al.] // TRENDS IN MAGNETISM. - 2011. - Vol. 168-169. - P69-72, DOI 10.4028/www.scientific.net/SSP.168-169.69 . - ISSN 1012-0394
Кл.слова (ненормированные):
acoustic mode -- exchange-coupled structures -- ferromagnetic resonance -- optic mode -- spin-wave resonance -- three-layer magnetic films -- ferromagnetic materials -- ferromagnetic resonance -- ferromagnetism -- magnetic devices -- magnetic films -- metallic films -- spin waves -- acoustics -- ferromagnetic materials -- ferromagnetic resonance -- ferromagnetism -- lattice vibrations -- multilayers -- resonance -- spin waves -- acoustic mode -- coupled structures -- optic mode -- spin-wave resonance -- three-layer -- exchange coupled -- exchange spin waves -- optic modes -- optical satellites -- resonance field -- spin wave resonances -- three-layer structures -- resonance -- magnetism
Аннотация: FMR and SWR spectra of exchange-coupled structures NiFe/Ag/NiFe have been investigated. We revealed that the optical satellites of the exchange spin-wave modes are characterized not by the standard Kittel-dependence but rather by their own resonance field dependence on the mode number: Hr opt(n)?n5/2.

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Держатели документа:
Kirensky Institute of Physics, Siberian Branch of RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Iskhakov, R. S.; Исхаков, Рауф Садыкович; Stolyar, S. V.; Yakovchuk, V. Yu.; Яковчук, Виктор Юрьевич; Chizhik, M. V.
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Gross, E. F.
The rotational vibrations of molecules crystal lattices of organic substances and scatterings spectra / E. F. Gross, A. V. Korshunov // Acta Physicochimica URSS. - 1945. - Vol. 20, n. 3. - P. 351

Публикация на русском языке Гросс Е. Ф. Вращательные качания молекул в кристаллической решетке органических веществ и спектры рассеяния [Текст] / Е. Ф. Гросс, А. В. Коршунов // Журн. эксперим. и теор. физ. - 1946. - Т. 16 вып. 1. - С. 53-59

Доп.точки доступа:
Korshunov, A. V.; Коршунов, Анатолий Васильевич; Гросс Е. Ф.
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Ignatchenko, V. A.
Development of a self-consistent approximation / V. A. Ignatchenko, D. S. Polukhin // J. Phys. A. - 2016. - Vol. 49, Is. 9. - Ст. 095004, DOI 10.1088/1751-8113/49/9/095004. - Cited References: 43 . - ISSN 1751-8113

РУБ Physics, Multidisciplinary + Physics, Mathematical
Рубрики:
SUPERCONDUCTING CRITICAL-TEMPERATURE
   LATTICE-VIBRATIONS
   VERTEX FUNCTION
   ELECTRON
Кл.слова (ненормированные):
self-consistent approximation -- Green's functions -- vertex corrections -- inhomogeneities -- correlations -- dynamic susceptibility
Аннотация: A self-consistent approximation of a higher level than the standard self-consistent approximation, known in various fields of physics as the Migdal, Kraichnan or Born self-consistent approximation, is derived taking into account both the first and second terms of the series for the vertex function. In contrast to the standard approximation, the new self-consistent approximation is described by a system of two coupled nonlinear integral equations for the self-energy and the vertex function. In addition to all the diagrams with non-intersecting lines of correlation/interaction taken into account by the standard self-consistent approximation, the new approach takes into account in each term of the Green's function expansion a significant number of diagrams with intersections of these lines. Because of this, the shape, linewidth, and amplitude of the resonance peaks of the dynamic susceptibility calculated in this approximation are much closer to the exact values of these characteristics. The advantage of the new self-consistent approach is demonstrated by the example of calculation of the dynamic susceptibility of waves in an inhomogeneous medium. © 2016 IOP Publishing Ltd.

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Доп.точки доступа:
Polukhin, D. S.; Полухин, Дмитрий Сергеевич; Игнатченко, Вальтер Алексеевич
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    Integration of negative, zero and positive linear thermal expansion makes borate optical crystals light transmission temperature-independent / X. Jiang, N. Wang, L. Dong [et al.] // Mater. Horizons. - 2022. - Vol. 9, Is. 8. - P. 2207-2214, DOI 10.1039/d2mh00273f. - Cited References: 50. - The authors acknowledge Zhuohong Yin for useful discussions and Anqi Dai from Guangzhou Design Institute for image processing. This work was supported by the National Scientific Foundations of China (Grants 11974360 and 51872297), the Young Elite Scientist Sponsorship Program by CAST (YESS), Key deployment projects of Rare Earth Research Institute (Grant ZDRW-CN-2021-3), and the CAS Project for Young Scientists in Basic Research (Grants YSBR-024) . - ISSN 2051-6347
   Перевод заглавия: Суммирование отрицательного, нулевого и положительного линейного теплового расширения делает светопропускание оптических кристаллов бората независимым от температуры
Кл.слова (ненормированные):
Lattice vibrations -- Light transmission -- Chemical component -- Harmful effects -- HEAT cool -- Heat expansion -- Linear thermal expansions -- Optical crystals -- Physico-chemical mechanisms -- Temperature independents -- Thermal excitation -- Zero thermal expansion -- Thermal expansion
Аннотация: Negative and zero thermal expansion (NTE and ZTE) materials are widely adopted to eliminate the harmful effect from the “heat expansion and cool contraction” effect and frequently embrace novel fundamental physicochemical mechanisms. To date, the manipulation of NTE and ZTE materials has mainly been realized by chemical component regulation. Here, we propose another method by making use of the anisotropy of thermal expansion in noncubic single crystals, with maximal tunability from the integration of linear NTE, ZTE and positive thermal expansion (PTE). We demonstrate this concept in borate optical crystals of AEB2O4 (AE = Ca or Sr) to make the light transmission temperature-independent by counterbalancing the thermal expansion and thermo-optics coefficient. We further reveal that such a unique thermal expansion behavior in AEB2O4 arises from the synergetic thermal excitation of bond stretching in ionic [AEO8] and rotation between covalent [BO3] groups. This work has significant implications for understanding the thermal excitation of lattice vibrations in crystals and promoting the functionalization of anomalous thermal expansion materials.

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Держатели документа:
Functional Crystals Lab, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
University of the Chinese Academy of Sciences, Beijing, 100049, China
School of Science, Jiangsu University of Science and Technology, Zhenjiang, 212100, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
School of Materials Science and Engineering, TKL of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin, 300350, China

Доп.точки доступа:
Jiang, X.; Wang, N.; Dong, L.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Wang, S.; Liu, Y.; Guo, S.; Li, W.; Huang, R.; Wu, S.; Li, L.; Lin, Z.
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IR active vibrations of a TbFe3(BO3)(4) crystal / M. I. Pashchenko [et al.] // Low Temp. Phys. - 2010. - Vol. 36, Is. 7. - P. 638-641 ; Физика низких температур, DOI 10.1063/1.3479413. - Cited References: 12 . - ISSN 1063-777X

РУБ Physics, Applied
Рубрики:
GDFE3(BO3)(4)
Аннотация: The IR reflection spectra of a TbFe3(BO3)(4) crystal are measured in the spectral range 200-2000 cm(-1) in E perpendicular to c polarization at temperatures 10 and 300 K. The reflection spectrum so obtained is analyzed and its interpretation is given on the basis of the internal vibrations of the ionic complexes BO33-, FeO69-, and TbO69- of the TbFe3(BO3)(4) crystal. Davydov splitting on the internal vibrational modes at a structural phase transition, which is accompanied by multiplication of the unit cell, was not observed in the experimental spectral range. This is due to the localization of the vibrations of the ionic complexes BO33-, FeO69-, and TbO69- of the TbFe3(BO3)(4) crystal. (c) 2010 American Institute of Physics. [doi:10.1063/1.3479413]

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Держатели документа:
[Pashchenko, M. I.
Bedarev, V. A.
Kut'ko, V. I.] Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
[Besmaternykh, L. N.
Temerov, V. L.] Russian Acad Sci, LV Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
B. Verkin Inst. for Low Temperature Physics, Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
L. V. Kirenskii Inst. of Physics, The Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Pashchenko, M. I.; Bedarev, V. A.; Kut'ko, V. I.; Besmaternykh, L. N.; Temerov, V. L.; Темеров, Владислав Леонидович

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KIM, P. D.
INTERFERENCE OF ELASTIC-WAVES, EXCITED BY VIBRATIONS OF DOMAIN-WALLS / P. D. KIM, D. C. KHVAN // Zhurnal Tek. Fiz. - 1983. - Vol. 53, Is. 5. - P. 947-949. - Cited References: 10 . - ISSN 0044-4642

РУБ Physics, Applied

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Доп.точки доступа:
KHVAN, D. C.
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Lattice dynamics and ferroelectric instability in ordered and disordered PbSc1/2Ta1/2O3 and PbSc1/2Nb1/2O3 solid solutions / V. I. Zinenko [et al.] // J. Exp. Theor. Phys. - 2007. - Vol. 105, Is. 3. - P. 617-625, DOI 10.1134/S1063776107090191. - Cited References: 23 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
RELAXOR FERROELECTRICS
   PHASE-TRANSITION
   LOCAL-STRUCTURE
   PB(SC1/2NB1/2)O-3
   PEROVSKITE
   CRYSTALS
Кл.слова (ненормированные):
Dipole moment -- Lattice vibrations -- Negative ions -- Phonons -- Positive ions -- Solid solutions -- Dynamic Born charges -- Ferroelectric instabilities -- Frequency spectra -- Gordon-Kim models -- Oxygen anions -- Phonon spectra -- Ferroelectricity
Аннотация: The dynamic Born charges and the frequency spectra of lattice oscillations in the crystals of ordered and disordered PbSc1/2Ta1/2O3 (PST) and PbSc1/2Nb1/2O3 (PSN) solid solutions have been calculated within the framework of the generalized Gordon-Kim model with allowance for the dipole and quadrupole polarizabilities. The phonon spectra of both compounds contain ferroelectric soft modes. The influence of various interactions on the magnitude of dynamic charges and ferroelectric instability in PSN and PST solid solutions has been studied and it is shown that both these charges and the ferroelectric instability are determined by the competition between long-range dipole-dipole interactions and short-range dipole-charge interactions, the determining role played by the interaction of Nb (Ta) cations and oxygen anions in the Nb-O (Ta-O) bond direction.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Lebedev Physical Institute, Russian Academy of Sciences, Moscow 119991, Russian Federation

Доп.точки доступа:
Zinenko, V. I.; Зиненко, Виктор Иванович; Zamkova, N. G.; Замкова, Наталья Геннадьевна; Maksimov, E. G.; Sofronova, S. N.; Софронова, Светлана Николаевна
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Makarova, I. P.
Structure and twinning of RbLiCrO4 crystals / I. P. Makarova, I. A. Verin, K. S. Aleksandrov // Acta Crystallogr. B. - 1993. - Vol. 49. - P. 19-28, DOI 10.1107/S0108768192006141. - Cited References: 14 . - ISSN 0108-7681

РУБ Crystallography
Рубрики:
LITHIUM POTASSIUM-SULFATE
   NEUTRON-DIFFRACTION
   THERMAL VIBRATIONS
   KLISO4
   PROGRAM
   LIKSO4
Аннотация: The crystal structures of the G3 (space group P31c) and G2 (space group P6(3)) phases of RbLiCrO4 have been determined from X-ray diffraction data (Mo Kalpha radiation) at 293, 428, 493 and 523 K (G3 phase) and 553 and 583 K (G2 phase). The RbLiCrO4 crystals exhibit twinning by merohedry with twin laws in the G3 phase: 2 parallel-to [001], m perpendicular-to [001], 1BAR; in the G2 phase: m parallel-to [001], 2 perpendicular-to [001], 1BAR. The analysis of diffraction intensities and influence of anomalous scattering on them provided the unambiguous determination of the twin laws for all the specimens investigated. The structure has been refined using the approximation of the anharmonic thermal vibrations of atoms.

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Держатели документа:
ACAD SCI,INST PHYS,SIBERIAN DIV,KRASNOYARSK 660036,RUSSIA
ИФ СО РАН

Доп.точки доступа:
Verin, I. A.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
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10.

Makarova, I. P.
X-ray diffraction study of RbLiCrO4 / I. P. Makarova, I. A. Verin, K. S. Aleksandrov // Ferroelectrics. - 1991. - Vol. 124, Is. 1. - P. 91-96, DOI 10.1080/00150199108209420. - Cited References: 12 . - ISSN 0015-0193

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
LITHIUM POTASSIUM-SULFATE
   THERMAL VIBRATIONS
   CRYSTALS
   PROGRAM
   KLISO4
   LIKSO4
Аннотация: Crystal structure of RbLiCrO4 was determined in G3 phase (sp. gr. P31c) at 293, 428, 493, 523 K and in G2 phase (sp. gr. P63) at 553, 583 K applying X-ray diffraction data. The investigated crystals exhibit ‘twinning by merohedry’. The analysis of intensities and influence of anomalous scattering on them allowed us to choose twin elements and atomic configurations of twin domains for all the investigated specimens.

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Доп.точки доступа:
Verin, I. A.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; European meeting on ferroelectricity(7 ; 1991 ; Jul ; 08-12 ; Dijon, France)
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