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  • 1
    Electronic Resource
    Electronic Resource
    Quantitative study on the nonlinear piezoelectric effect in KNbO3 single crystals for a highly efficient surface acoustic wave elastic convolver (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 3457-3461 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this article we describe quantitative studies on the nonlinear piezoelectric effect in KNbO3 single crystals for a highly efficient surface acoustic wave elastic convolver. First, we demonstrate that a simple measurement of the nonlinear piezoelectric constant of e355 is very effective for quantitative estimation of the efficiency of an elastic convolver. Next, the third-order piezoelectric constants, e355, e333, and e344, in rotated Y-cut KNbO3 substrates are measured by varying the velocity under an applied electric field. Using the third-order piezoelectric constants measured, quantitative estimations of the convolution efficiency are discussed. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372366
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  • 2
    Electronic Resource
    Electronic Resource
    Scanning nonlinear dielectric microscope (1996)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 2297-2303 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: This article describes a new scanning technique for imaging the state of spontaneous polarization of a ferroelectric material by measuring the microscopic point-to-point variation of its nonlinear dielectric constants. First, the theory for detecting polarization is described. Second, the technique for measuring the nonlinear dielectric response is described. Finally, using this new microscope, area scans are obtained of the polarization of poled lead zirconate titanate ceramics, a lithium niobate single crystal, and of piezoelectric thin films of the copolymer of vinylidene fluoride and trifluoroethylene. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1146936
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  • 3
    Electronic Resource
    Electronic Resource
    Photothermal dielectric spectroscopic microscope (1996)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 19-28 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new photothermal technique is proposed. It is based on the temperature characteristic of the dielectric constant of light-irradiated material. When chopped light is absorbed in a dielectric material, an alternating variation of capacitance is caused by the heat produced due to light absorption and is detected by using a frequency demodulation technique. A quantitative derivation is presented for the alternating capacitance variation in terms of the optical, thermal, dielectric, and geometric parameters of the system. The experimental results for lead zirconate titanate ceramics, barium titanate single-crystal, TiO2–Bi2Ti4O11 ceramics, and ethyl alcohol are shown, where the observed signals agree with theoretical ones very well. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1146544
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  • 4
    Electronic Resource
    Electronic Resource
    Scanning Electron-Beam Dielectric Microscopy for the Investigation of the Temperature Coefficient Distribution of Dielectric Ceramics (2000)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 83 (2000), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Studies on scanning electron-beam dielectric microscopy are reported. This microscopy technique is used for determining the temperature coefficient distribution of dielectric materials using an electron beam as a heat source instead of a light beam as in photothermal dielectric microscopy. This microscopy technique, which has the ability to simultaneously observe SEM images and the material composition by EPMA, has a resolution better than that of photothermal dielectric microscopy. To demonstrate the usefulness of this technique, the two-dimensional image of a two-phase composite ceramic composed of TiO2 and Bi2Ti4O11 is measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2000.tb01375.x
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  • 5
    Electronic Resource
    Electronic Resource
    Theoretical and experimental studies of LiNbO3 degenerate acoustic elastic convolver (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 1728-1739 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The crystal orientation dependencies of the figure of merit (M value) of different types of LiNbO3 degenerate acoustic elastic convolvers (TVC, THC, BWC) have been theoretically and experimentally investigated. First, for TVC, it is shown that the theoretical M values using the nonlinear constants measured by authors these days have been in good agreement with their measured values. Second, for THC, the new definition of the figure of merit (M value) and practically effective equivalent circuit are proposed and the existence of the crystal cut and the direction of propagation with high efficiency and large electromechanical coupling coefficient is shown. Finally, this paper presents the efficient bulk wave mode for LiNbO3 BWC by defining and calculating the M value for BWC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338070
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  • 6
    Electronic Resource
    Electronic Resource
    Nonlinear, elastic, piezoelectric, electrostrictive, and dielectric constants of lithium niobate (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 875-887 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: All eight electrostrictive, all three third-order dielectric, all thirteen third-order piezoelectric, and all fourteen third-order elastic constants of lithium niobate have been determined. Measurements for the electrostrictive constants have been made by measuring the electric capacity in selected directions when the directed static stresses were applied to the crystal. The third-order dielectric constants have been calculated from these measured electrostrictive constants and the measured capacitance as functions of the applied static electric field. The third-order piezoelectric and elastic constants have both been determined from the above-mentioned two kinds of measured constants and the measured velocities for small-amplitude ultrasonic waves as functions of several applied stresses and static electric fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338138
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  • 7
    Electronic Resource
    Electronic Resource
    Dynamic method for measuring the velocity variation of ultrasound in piezoelectric ceramics with an alternating electric field (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 1244-1247 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The development and application of a new dynamic measuring method of velocity variation of piezoelectric materials, especially of lead zirconate titanate (PZT) ceramics, with an alternating electric field is presented. This method has the following advantages over the conventional static method. (1) The velocity variation due to nonlinear effect is separable from the velocity variation due to temperature change. (2) The adiabatic nonlinear coefficients are obtainable. (3) In spite of the dynamic nature of the method, it fixes the sign of the nonlinear coefficient. (4) Separating the orders of the velocity variation as a function of the applied electric field, each order of coefficients is determinable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144124
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  • 8
    Electronic Resource
    Electronic Resource
    Surface acoustic wave soliton propagating on the metallic grating waveguide (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 1188-1190 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The surface acoustic wave (SAW) soliton of the Korteweg–de Vries (KdV)-type propagating on the metallic grating waveguide has been observed experimentally. The periodic train of two solitons developed from the continuous sine wave of SAW. A large-amplitude soliton caught up with a small-amplitude soliton and these two solitons recombined into the initial sine wave at the recurrence point. The observed wave forms agreed with the calculated ones very well which were obtained by solving the KdV equation and satisfied the first conservation law of the KdV equation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.109766
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  • 9
    Electronic Resource
    Electronic Resource
    Scanning nonlinear dielectric microscopy with nanometer resolution (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 2833-2835 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A very high-resolution scanning nonlinear dielectric microscope was developed for the observation of ferroelectric polarization. We demonstrate that the resolution of the microscope is of a nanometer order by measurement of the c–c domain wall of a BaTiO3 single crystal, and that this microscope is very useful not only for the domain observation of ferroelectric bulk material but also for that of thin films. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125165
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  • 10
    Electronic Resource
    Electronic Resource
    Scanning-nonlinear-dielectric-microscopy study on periodically poled LiNbO3 for a high-performance quasi-phase matching device (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 2955-2957 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Studies of the domain distribution of periodically poled LiNbO3 (PPLN) using scanning nonlinear dielectric microscopy (SNDM) were performed for high-quality quasi-phase matching (QPM) devices and some very important results were obtained. First, a single domain surface layer formed on PPLN was found and second, the SNDM studies also revealed that a very strong residual stress or an internal electric field remained in PPLN fabricated using the application of a high voltage due to the pinning effect in single crystal LiNbO3. This stress or internal field substantially reduced the nonlinear dielectric constant of LiNbO3. By annealing to release this stress, it was confirmed that the LiNbO3 recovered from the reduced nonlinear dielectric constant. In the optical region, this constant is equivalent to the second harmonic generation constant, therefore, it is proposed that annealing is an effective method for obtaining a highly efficient high-performance QPM device. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1414299
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