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Найдено документов в текущей БД: 6

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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Bulk acoustic waves propagation in Li2B4O7 piezoelectric crystals under the static uniaxial mechanical pressure

/ K. S. Aleksandrov [et al.] // Proceedings of the Annual IEEE International Frequency Control Symposium / Annual frequency control symposium (54 ; 2000 ; Jun. ; 7-9 ; Kansas, MO). - 2000. - P. 214-217. - Cited References: 8 . - ISBN 01616404

Кл.слова (ненормированные):
Acoustic wave transmission -- Acoustic wave velocity -- Elasticity -- Lithium compounds -- Mathematical models -- Permittivity -- Piezoelectricity -- Pressure effects -- Single crystals -- Electromechanical constants -- Piezoelectric crystal -- Piezoelectric materials

Аннотация: The influence of uniaxial mechanical stresses on bulk acoustic waves velocity in piezoelectric crystals Li2B4O7 has been investigated. Electromechanical constants have determined.

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Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Turchin, P. P.; Sorokin, B. P.; Karpovich, A. A.; Nefedov, V. A.; Annual frequency control symposium(54 ; 2000 ; Jun. ; 7-9 ; Kansas, MO)

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Effects of static electric field and of mechanical pressure on surface acoustic waves propagation in La3Ga5SiO14 piezoelectric single crystals

/ K. S. Aleksandrov [et al.] // Proc IEEE Ultrason Symp. - 1995. - Vol. 1. - P. 409-412 . - ISBN 1051-0117

Кл.слова (ненормированные):
Electric field effects -- Electrostriction -- Lanthanum compounds -- Piezoelectric materials -- Piezoelectricity -- Pressure effects -- Quartz -- Single crystals -- Tensors -- Bulk acoustic wave -- Dielectric permeability -- Electromechanical bond coefficients -- Lanthanum gallium silicide -- Mechanical pressure -- Nonlinear electromechanical properties -- Nonlinear piezoelectric effect -- Piezoquartz -- Static electric field -- Tensorial components -- Ultrasonic propagation

Аннотация: The complete set of tensorial components of linear and nonlinear electromechanical properties for La3Ga5SiO14 piezoelectric crystals have been obtained. These data were used for the analysis of influence of static electrical field and of uniaxial homogeneous mechanical pressure on the propagation of surface acoustic waves.

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Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Sorokin, B. P.; Turchin, P. P.; Burkov, S. I.; Glushkov, D. A.; Karpovich, A. A.; IEEE International Ultrasonics Symposium(1995 ; Nov. ; 7-10 ; Seattle, USA)

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Peculiarities of electromechanical properties of ferroelectric NH//4HSeO//4

/ V. S. Krasikov [et al.] // Ferroelectrics. - 1983. - Vol. 54, Is. 1. - P. 431-434 . - ISSN 0015-0193

Кл.слова (ненормированные):
ELASTICITY -- PIEZOELECTRICITY -- AMMONIUM HYDROSELENATE -- ELECTROMECHANICAL PROPERTIES -- PHASE TRANSITIONS -- FERROELECTRIC MATERIALS

Аннотация: Dielectric, piezoelectric and elastic properties of NH//4HSeO//4 crystal were studied in temperature range 180-300 K. Some anomalies of the properties near T//c equals 250 K and T//i equals 261 K were found. These anomalies are caused by high dielectric permeability along b-axis above T//i and the symmetry-forbidden piezoelectric coupling. An effort of phenomenological description of the successive phase transitions is made.

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Доп.точки доступа:
Krasikov, V. S.; Zaitseva, M. P.; Shabanova, L. A.; Zrazhevsky, V. M.; Zherebtsova, L. I.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; European Meeting on Ferroelectricity(5 ; 1983 ; Sept. ; 26-30 ; Malaga, Sp)

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Non-linear piezoelectricity in sillenite structure crystals

/ K. S. Aleksandrov [и др.] // Ferroelectrics. - 1982. - Vol. 41, Is. 1. - P. 27-33 . - ISSN 0015-0193

Кл.слова (ненормированные):
ELASTIC WAVES - Propagation -- PIEZOELECTRIC MATERIALS

Аннотация: Propagation of small amplitude elastic waves in piezoelectric media deformed by the electrostatic field has been considered. Green-Christoffel equations describing the propagation of elastic waves in crystals with the biasing electrostatic field have been obtained. The experimental studies of the field dependence on elastic wave velocities for a number of sillenite structure crystals have been carried out. Non-linear piezoelectric coefficients for Bi//1//2GeO//2//0, Bi//1//2SiO//2//0 have been obtained.

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Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Sorokin, B. P.; Kokorin, Y. I.; Chetvergov, N. A.; Grekhova, T. I.

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Coexistence of the electric polarization and conductive current in the bismuth–neodymium ferrite garnet films

/ S. S. Aplesnin, A. N. Masyugin, M. N. Volochaev, T. Ishibashi // J. Mater. Sci. Mater. Electron. - 2021. - Vol. 32. - P. 3766-3781, DOI 10.1007/s10854-020-05121-9. - Cited References: 42 . - ISSN 0957-4522

Кл.слова (ненормированные):
Bismuth -- Bismuth compounds -- Dielectric materials -- Epitaxial films -- Ferroelectricity -- Gallium compounds -- Garnets -- Hysteresis -- Iron compounds -- Neodymium -- Neodymium compounds -- Piezoelectricity -- Single crystals -- Substrates

Аннотация: The Nd1Bi2Fe5O12/Nd2Bi1Fe4Ga1O12 polycrystalline films on the glass substrate and the Nd0.5Bi2.5Fe5O12 epitaxial films on the single-crystal gadolinium gallium garnet substrate have been investigated by impedance and dielectric spectroscopy. The inductive contribution to the impedance and two relaxation channels related to ferroelectric domains and migration polarization have been established. The magnetocapacitance and magnetoimpedance have been determined. The conductive and polarization currents and the phase difference between them for the films of two types have been determined. The critical temperatures of the polarization disappearance and hysteresis I–V have been found. A model of the polarization caused by the piezoelectric effect and flexoelectric interaction has been proposed. I–V hysteresis is explained by the presence of ferroelectric domains near the interface and is associated with the hysteresis of the electric polarization.

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Держатели документа:
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Department of Materials Science and Technology, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

Доп.точки доступа:
Aplesnin, S. S.; Masyugin, A. N.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Ishibashi, T.

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