Love-Type Wave in PMN-PT Single Crystal Layered Structures with Periodic Undulations

Love-type wave propagation has been studied in a layered structure consisting of a thin layer of PMN-PT single crystal deposited on an elastic half-space. The weakly periodic undulations of the upper surface of the layered system and the common interface between the PMN-PT layer and the elastic substrate are considered. The PMN-PT single crystal is poled along the [011]_c direction so that the macroscopic symmetry is orthonormal mm2. The dispersion relations for electrically open and shorted circuits are obtained. The effects of various parameters including corrugation, undulatory, position and electrical boundary conditions on dispersion properties of Love-type waves are discussed. The results show that corrugations of the surface and the interface play a dominant role in the propagation of a Love-type wave, especially, the interfacial corrugation can produce an anomalous dispersion in the case of an electrically shorted condition. The surface corrugation enhances the phase velocity of a Love-type wave while the interface corrugation reduces the phase velocity in the range of relatively smaller wavenumber, and these variations gradually tend to vanish with increase in wavenumber. The undulatory parameter and the position parameter present a secondary impact on the dispersion behaviors of a Love-type wave compared with the corrugation parameters, both of them slightly enhance the phase velocity. The obtained results can offer some fundamentals for improving the efficiency and sensitivity of the interface response in the design and application of piezoelectric SAW devices.

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Switching the Conformation of 3,2′:6′,3″-tpy Domains in 4′-(4-n-Alkyloxyphenyl)-3,2′:6′,3″-Terpyridines

Molecules ◽

10.3390/molecules25143162 ◽

2020 ◽

Vol 25 (14) ◽

pp. 3162 ◽

Cited By ~ 2

Author(s):

Dalila Rocco ◽

Alessandro Prescimone ◽

Edwin C. Constable ◽

Catherine E. Housecroft

Keyword(s):

Solid State ◽

Single Crystal ◽

Crystal Structures ◽

Dominant Role ◽

Van Der Waals Interactions ◽

Single Crystal Structures ◽

Solid State Structures ◽

Packing Interactions ◽

Adjacent Sheet

The preparation and characterization of 4′-(4-n-octyloxyphenyl)-3,2′:6′,3″-terpyridine (8) and 4′-(4-n-nonyloxyphenyl)-3,2′:6′,3″-terpyridine (9) are reported. The single crystal structures of 4′-(4-n-hexyloxyphenyl)-3,2′:6′,3″-terpyridine (6), 4′-(4-n-heptyloxyphenyl)-3,2′:6′,3″-terpyridine (7), and compounds 8 and 9 have been determined. The conformation of the 3,2′:6′,3″-tpy unit is trans,trans in 6 and 7, but switches to cis,trans in 8 and 9. This is associated with significant changes in the packing interactions with a more dominant role for van der Waals interactions between adjacent n-alkyloxy chains and C–Hmethylene... π interactions in 8 and 9. The solid-state structures of 6 and 7 with the n-hexyloxy and n-heptyloxy chains feature interwoven sheets of supramolecular assemblies of molecules, with pairs of n-alkyloxy chains threaded through cavities in an adjacent sheet.

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Observation of counterion effects and dimensionality reduction in single-crystal (EDO-TTF)2SbF6 with ultrafast electron diffraction

EPJ Web of Conferences ◽

10.1051/epjconf/201920504007 ◽

2019 ◽

Vol 205 ◽

pp. 04007

Author(s):

Lai Chung Liu ◽

Yifeng Jiang ◽

Henrike M. Mueller-Werkmeister ◽

Cheng Lu ◽

Gustavo Moriena ◽

...

Keyword(s):

Electron Transfer ◽

Electron Diffraction ◽

Dimensionality Reduction ◽

Single Crystal ◽

Structural Dynamics ◽

Dominant Role ◽

Ultrafast Electron Diffraction ◽

Femtosecond Electron Diffraction ◽

Lower Dimensional

Femtosecond electron diffraction is used to resolve structural dynamics in single-crystal (EDO-TTF)2XF6 (X = P, Sb). The retarded and lower-dimensional dynamics of the latter illustrate the dominant role of counterion motion in stabilizing electron transfer.

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An explicit relation for the apparent phase velocity of Rayleigh waves in a vertically heterogeneous elastic half-space

Geophysical Journal International ◽

10.1093/gji/ggu283 ◽

2014 ◽

Vol 199 (2) ◽

pp. 673-687 ◽

Cited By ~ 4

Author(s):

Carlo G. Lai ◽

Maria-Daphne Mangriotis ◽

Glenn J. Rix

Keyword(s):

Phase Velocity ◽

Half Space ◽

Rayleigh Waves ◽

Elastic Half Space ◽

Explicit Relation

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Propagation of Love-Type Wave in a Corrugated Fibre-Reinforced Layer

Journal of Mechanics ◽

10.1017/jmech.2016.40 ◽

2016 ◽

Vol 32 (6) ◽

pp. 693-708 ◽

Cited By ~ 9

Author(s):

A. K. Singh ◽

K. C. Mistri ◽

A. Das

Keyword(s):

Wave Equation ◽

Dispersion Relation ◽

Phase Velocity ◽

Comparative Study ◽

Love Wave ◽

Substantial Effect ◽

Free Layer ◽

Type Wave ◽

State Of Stress ◽

Boundary Surfaces

AbstractThe present paper investigates the propagation of Love-type waves in an initially stressed heterogeneous fibre-reinforced layer with corrugated boundary surfaces, lying over a viscoelastic half-space under hydrostatic state of stress. The dispersion relation is obtained in closed form and found to be in well-agreement with the classical Love wave equation. The substantial effect of reinforcement, position and undulation parameters (i.e. corrugation), heterogeneity, horizontal initial stress and hydrostatic state of stress are discussed briefly. It is established through comparative study that reinforced layer supports more to phase velocity of Love-type wave as compare to reinforced free layer.

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GEODYNAMICS

GEODYNAMICS ◽

10.23939/jgd2011.02.101 ◽

2011 ◽

Vol 2(11)2011 (2(11)) ◽

pp. 101-103

Author(s):

І. Kalinyuk ◽

Keyword(s):

Phase Velocity ◽

Point Source ◽

Dispersion Equation ◽

Zero Mode ◽

Elastic Half Space ◽

Homogeneous Layer ◽

Sediment Thickness ◽

Complex Phase ◽

Waveguide Model ◽

Liquid Precipitation

In this paper, two hydro acoustic waveguide model with absorption, which consists of a homogeneous layer of water, a uniform layer of liquid precipitation and an elastic half-space, which is a point source. Numerically solved the dispersion equation that defined the complex phase velocity. The influence of sediment thickness on the phase velocity of the zero mode.

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Magnetization studies of Tris(ethylenediamine)nickel(II) complexes down to 2 K

Australian Journal of Chemistry ◽

10.1071/ch9770281 ◽

1977 ◽

Vol 30 (2) ◽

pp. 281 ◽

Cited By ~ 1

Author(s):

DJ Mackey

Keyword(s):

Hydrogen Bonding ◽

Single Crystal ◽

Related Compound ◽

Magnetic Moment ◽

Dominant Role ◽

Exchange Mechanism ◽

Average Magnetic Moment

Single crystal magnetization studies of Ni(en)3(NO3)2 down to 2 K show that there are appreciable antiferromagnetic interactions parallel and perpendicular to the hexagonal c axis. Deuteration of the NH2 groups has no effect on the average magnetic moment of the compound and it seems that hydrogen bonding does not play a dominant role in the exchange mechanism. The structurally related compound Ni(en)3SO4 behaves as a simple paramagnet down to 2 K.

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MICROSTRUCTURE CHARACTERIZATION OF PIEZOELECTRIC SINGLE CRYSTAL SUBSTRATES FOR PROPERTY DEGRADATION SAW DEVICES

Integrated Ferroelectrics ◽

10.1080/10584580600659845 ◽

2006 ◽

Vol 80 (1) ◽

pp. 289-295 ◽

Cited By ~ 1

Author(s):

LIMEI RONG ◽

MOHUA YANG ◽

GUORU CAI ◽

HONG JI ◽

YAN LI ◽

...

Keyword(s):

Single Crystal ◽

Microstructure Characterization ◽

Saw Devices

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The influence of crack face electrical boundary conditions on the nonlinear behavior of ferroelectric single crystal

Smart Materials and Structures ◽

10.1088/0964-1726/22/6/065001 ◽

2013 ◽

Vol 22 (6) ◽

pp. 065001 ◽

Cited By ~ 1

Author(s):

Hongliang Gu ◽

Jie Wang

Keyword(s):

Boundary Conditions ◽

Single Crystal ◽

Nonlinear Behavior ◽

Crack Face ◽

Electrical Boundary Conditions ◽

Ferroelectric Single Crystal

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A study on launch site ground of vehicle-mounted missile based on elastic layer theory

Advances in Mechanical Engineering ◽

10.1177/1687814018807322 ◽

2018 ◽

Vol 10 (10) ◽

pp. 168781401880732 ◽

Cited By ~ 1

Author(s):

Liangyu Zhao ◽

Yi Jiang

Keyword(s):

Calculation Method ◽

Elastic System ◽

Tangential Direction ◽

Elastic Half Space ◽

System Model ◽

Layered System ◽

Launch Site ◽

Finite Element Numerical Simulation ◽

Equivalent Modulus ◽

Numerical Calculation Method

With the widespread use of the vehicle-mounted missile launching system, the research of launch site ground becomes very important. The loading of missile launch system under the supporting disk is similar to inverted bell, and its radius and size of the missile launching are much more than a car. So the ready-made equivalent modulus formula under the action of circular uniformly distributed loading is not suitable for the calculation of launch site ground of vehicle-mounted missile. Therefore, based on the elastic layered system and the Gauss–Legendre numerical calculation method, a new calculation method of equivalent modulus is proposed, as well as the regression formulation for calculation of equivalent modulus of foundation is also shown. Based on the above analysis, a launch site ground mechanical model is presented. The thin plate model on elastic half-space foundation was formulated taking into account normal direction and the double-layer elastic system model was proposed for in tangential direction. Validity of the model was done by coring the programming calculation with the finite element numerical simulation for selected cases.

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