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Каталог книг и брошюр библиотеки ИФ СО РАН (16)

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Reflection and refraction of bulk acoustic waves in piezoelectric crystals under the action of bias electric field and uniaxial pressure / S. I. Burkov [et al.] // Proceedings - IEEE Ultrasonics Symposium. - 2008. - Ст. 4803254. - P. 2161-2164, DOI 10.1109/ULTSYM.2008.0535 . - ISBN 1051-0117
Кл.слова (ненормированные):
Bias electric field -- Bulk elastic wave -- Mechanical stress -- Piezoelectric crystal -- Reflection -- Refraction -- Bias electric field -- Bulk acoustic waves -- Bulk elastic wave -- Mechanical stress -- Piezoelectric crystal -- Piezoelectric crystals -- Uniaxial pressures -- Acoustic wave reflection -- Acoustics -- Crystals -- Elastic waves -- Elasticity -- Electric field measurement -- Electric fields -- Piezoelectric materials -- Piezoelectric transducers -- Piezoelectricity -- Refraction -- Soil structure interactions -- Stresses
Аннотация: Main theory results concerned with bulk elastic wave reflection/refraction on the boundary between two piezoelectric crystals subjected to the action of bias electric field or mechanical stress have presented. Some calculations for LiNbO3 and Bi12GeO20 crystals have made. В©2008 IEEE.

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Доп.точки доступа:
Burkov, S. I.; Sorokin, B. P.; Karpovich, A. A.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; IEEE International ultrasonics symposium(2008 ; Nov. ; 2-5 ; Beijing, China)
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The examination of frequency dependences of elastic waves velocities and their attenuation in heterogeneous mediums / P. P. Turchin [et al.] // Proceedings - IEEE Ultrasonics Symposium. - 2007. - Ст. 4409985. - P. 1637-1640, DOI 10.1109/ULTSYM.2007.412 . - ISBN 1051. - ISBN 1424413834; 9781424413836
Кл.слова (ненормированные):
Automation of measurings -- Ceramics -- Composites -- Elastic properties -- Physical acoustics -- Sound signal attenuation -- Elastic waves -- Elasticity -- Waves -- Automation of measurings -- Ceramics -- Composites -- Elastic properties -- Frequency dependences -- Frequency ranging -- Physical acoustics -- Sound signal attenuation -- Ultrasonics
Аннотация: The pulse - phase method for examination of ultrasonic waves propagation in materials, including mediums with high attenuation of a sound was designed. By automation methods of measurings the opportunity of determination the elastic waves velocities with an frequency range 100 kHz - 30 MHz with the resolution on frequency of 10-6 Hz is implemented. The phase method and a method of the frequency strobing for recording impulses are realized. These methods allow to define with precision not worse than 10-9 second the time of ultrasonic waves propagation. Requirements to the minimum linear dimensions of samples are restricted by the method sensitivity only. Velocities of elastic waves and their signal attenuation in ceramic and composites are measured. В© 2007 IEEE.

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Доп.точки доступа:
Turchin, P. P.; Parfenov, A. A.; Beletsky Jun, V. V.; Volzhentcev, A. A.; Ruzanov, V. M.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; IEEE International Ultrasonics symposium(2007 ; Oct. ; 28-31 ; New York, USA)
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Aplesnin, S. S.
Two-dimensional quantum spin liquid with S=1/2 spins interacting with acoustic phonons / S. S. Aplesnin // Phys. Lett. A. - 2004. - Vol. 333, Is. 5-6. - P. 446-449, DOI 10.1016/j.physleta.2004.10.064. - Cited References: 11 . - ISSN 0375-9601

РУБ Physics, Multidisciplinary
Рубрики:
ANTIFERROMAGNET
Кл.слова (ненормированные):
spin-phonon interactions -- spin-liquid -- spinon excitations -- Spin-liquid -- Spin-phonon interactions -- Spinon excitations -- ferromagnetic material -- acceleration -- acoustics -- article -- density -- energy -- liquid -- magnetic field -- mathematical analysis -- Monte Carlo method -- phonon -- quantum mechanics
Аннотация: The spin density of states of a two-dimensional antiferromagnet in magnetic field having spins-1/2 and interacting with acoustic phonons is investigated in the nonadiabatic approximation using the quantum Monte Carlo method. It is found the gap energy A in the single particle spin excitations spectrum closes at magnetic field Delta similar or equal to H-c, W-ph W-s, where W-ph and W-s are the bandwidths of phonon and spin excitations in antiferromagnet. (C) 2004 Elsevier B.V All rights reserved.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
L.V. Kirenskii Institute of Physics, Siberian Br. Russ. Acad. of Sci., Krasnoyarsk 660036, Russia, Russian Federation

Доп.точки доступа:
Аплеснин, Сергей Степанович
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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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    A hybrid approach for predicting the distribution of vibro-acoustic energy in complex built-up structures / D. N. Maksimov, G. Tanner // J. Acoust. Soc. Am. - 2011. - Vol. 130, Is. 3. - P1337-1347, DOI 10.1121/1.3621321. - Cited Reference Count: 31. - European CommunityEuropean Commission [PIAP-GA-2008-230597]; EPSRCUK Research & Innovation (UKRI)Engineering & Physical Sciences Research Council (EPSRC) [EP/F069189/1] Funding Source: UKRI; Engineering and Physical Sciences Research CouncilUK Research & Innovation (UKRI)Engineering & Physical Sciences Research Council (EPSRC) [EP/F069189/1] Funding Source: researchfish, We thank David Chappell and Niels Sondergaard for stimulating discussions and reading the manuscript. Fruitful discussions with Brian Mace, Frank Vogel, and Cathleen Seidel are acknowledged. We have received financial support through the European Community's Seventh Framework Programme (FP7/2007-2013) under Grant No. PIAP-GA-2008-230597. . - ISSN 0001-4966. - ISSN 1520-8524
Рубрики:
Acoustics
    Audiology & Speech-Language Pathology
Аннотация: Finding the distribution of vibro-acoustic energy in complex built-up structures in the mid-to-high frequency regime is a difficult task. In particular, structures with large variation of local wavelengths and/or characteristic scales pose a challenge referred to as the mid-frequency problem. Standard numerical methods such as the finite element method (FEM) scale with the local wavelength and quickly become too large even for modern computer architectures. High frequency techniques, such as statistical energy analysis (SEA), often miss important information such as dominant resonance behavior due to stiff or small scale parts of the structure. Hybrid methods circumvent this problem by coupling FEM/BEM and SEA models in a given built-up structure. In the approach adopted here, the whole system is split into a number of subsystems that are treated by either FEM or SEA depending on the local wavelength. Subsystems with relative long wavelengths are modeled using FEM. Making a diffuse field assumption for the wave fields in the short wave length components, the coupling between subsystems can be reduced to a weighted random field correlation function. The approach presented results in an SEA-like set of linear equations that can be solved for the mean energies in the short wavelength subsystems. (C) 2011 Acoustical Society of America. [DOI: 10.1121/1.3621321]

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Держатели документа:
Univ Nottingham, Sch Math Sci, Nottingham NG7 2RD, England

Доп.точки доступа:
Maksimov, Dmitrii N.; Tanner, Gregor
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