By Topic

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Issue 5 • Date May 2008

Filter Results

Displaying Results 1 - 25 of 42
  • "IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control - Front cover"

    Publication Year: 2008 , Page(s): c1 - c2
    Save to Project icon | Request Permissions | PDF file iconPDF (501 KB)  
    Freely Available from IEEE
  • IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society - Administrative Committee

    Publication Year: 2008 , Page(s): i
    Save to Project icon | Request Permissions | PDF file iconPDF (154 KB)  
    Freely Available from IEEE
  • IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society - Elected Administrative Committee

    Publication Year: 2008 , Page(s): ii
    Save to Project icon | Request Permissions | PDF file iconPDF (54 KB)  
    Freely Available from IEEE
  • Table of contents

    Publication Year: 2008
    Save to Project icon | Request Permissions | PDF file iconPDF (228 KB)  
    Freely Available from IEEE
  • Information for Contributors with Multimedia Addition

    Publication Year: 2008 , Page(s): 931 - 935
    Save to Project icon | Request Permissions | PDF file iconPDF (213 KB)  
    Freely Available from IEEE
  • A multimedia example

    Publication Year: 2008 , Page(s): 936
    Save to Project icon | Request Permissions | PDF file iconPDF (220 KB)  
    Freely Available from IEEE
  • Call for front-cover images for the Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

    Publication Year: 2008 , Page(s): 937
    Save to Project icon | Request Permissions | PDF file iconPDF (147 KB)  
    Freely Available from IEEE
  • Introduction to the special isue on the applications of ferroelectrics: Part II

    Publication Year: 2008 , Page(s): 938 - 941
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (185 KB)  

    The 25 papers in this special issue focus on the applications of ferroelectrics. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fabrication and scanning-angle temperature dependence of metal-based, optical resonant scanners with PZT actuation

    Publication Year: 2008 , Page(s): 942 - 945
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (441 KB) |  | HTML iconHTML  

    Metal-based, optical scanning devices with a large mirror size of 1 mm2 and a wide scanning angle of over 90deg were fabricated. A high optical scanning angle (90deg) was achieved at a resonance frequency of 7.33 kHz and a driving voltage of 80 V (peak-to-peak) in ambient air without vacuum packaging. We compared the performance of metal-based, optical scanners driven by PZT bulk ceramic and aerosol-deposited PZT thick films over the temperature range from -20degC to 80degC in an environmental chamber. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Researching on resonance characteristics influenced by the structure parameters of 1-3-2 piezocomposites plate

    Publication Year: 2008 , Page(s): 946 - 951
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (638 KB) |  | HTML iconHTML  

    The 1-3-2 composite is made of 1-3 composite and ceramic base. Its effective properties are calculated based on the linear piezoelectric theory and uniform field theory. The influence of piezoelectric phase volume fraction and composite aspect (thickness/width) on resonance characteristic of square 1-3-2 piezoelectric composite plate has been researched. In addition, some 1-3-2 composite samples were fabricated by dice-fill technology. The resonance frequency of samples was investigated. The results show that the experiment agrees well with the calculation. The pure thickness resonance mode of 1-3-2 composite will be gained when the volume fraction of ceramic bottom is less than 30%; that of ceramic rods is in the range of 30%~80% and the ratio of thickness to width is less than 0.35. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Ferroelectric domain in PMN-xPT single crystal studied by piezoresponse force microscopy and finite-element analysis

    Publication Year: 2008 , Page(s): 952 - 956
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1083 KB) |  | HTML iconHTML  

    Ferroelectric domain structures in (001)-cut Pb(Mg1/3Nb2/3)O3-38%PbTiO3 and (011)-cut Pb(Mg1/3 Nb2/3)O3-60%PbTiO3 single crystals are studied by means of piezoresponse force microscopy (PFM). The out-of- plane-polarization (OPP) and in-plane-polarization (IPP) domain piezoresponse imaging reveals the domain and domain boundary configurations in these two different PbTiO3-content crystals. Finite-element analysis is carried out to illustrate the OPP and IPP-PFM imagings mechanism and interpret the domains superposition phenomenon during PFM imaging. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electron backscatter diffraction as a domain analysis technique in BiFeO3-PbTiO3 single crystals

    Publication Year: 2008 , Page(s): 957 - 962
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1588 KB) |  | HTML iconHTML  

    xBiFeO3-(1-x)PbTiO3 single crystals were grown via a flux method for a range of compositions. Presented here is a study of the domain configuration in the 0.5BiFeO3-0.5PbTiO3 composition using electron backscatter diffraction to demonstrate the ability of the technique to map ferroelastic domain structures at the micron and submicron scale. The micron-scale domains exhibit an angle of approximately 85deg between each variant, indicative of a ferroelastic domain wall in a tetragonal system with a spontaneous strain, c/a - 1 of 0.10, in excellent agreement with the lattice parameters derived from X-ray diffraction. Contrast seen in forescatter images is attributed to variations in the direction of the electrical polarization vector, providing images of ferroelectric domain patterns. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Phase field modeling of domain structures in ferroelectric thin films

    Publication Year: 2008 , Page(s): 963 - 970
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (444 KB) |  | HTML iconHTML  

    Phase-field simulations were used to explore the effect of the characteristics of the Landau-Devonshire free energy and values of electrostatic and elastic interactions on the formation of different types of domain structures in ferroelectric thin films. Simulations were performed at different constant-applied electric fields and by using a cyclic continuously changing field. It is shown that the 180deg or 90deg domain structures can be produced depending on the relative strength of elastic interactions and the ratio of barrier heights that determine the energy of the 180deg and 90deg domain boundaries. It is shown that the applied field strength and the thickness of the dead layer can play a minor role in the transition between the 90deg and 180deg domain structures. It is also demonstrated that the poling history can affect the type of the domain structure. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • X-ray topography of piezoelectric La3Ta0.5Ga5.5O14 crystal grown by Czochralski method

    Publication Year: 2008 , Page(s): 971 - 974
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (463 KB) |  | HTML iconHTML  

    We performed synchrotron X-ray topography on a La3Ta0.5Ga5.5O14 (LTG) crystal grown by the Czochralski method. Since a synchrotron X-ray source can provide high-energy X-rays, one can detect bulk structures by X-ray topography. LTG is one of the most attractive piezoelectric crystals along with La3Ga5SiO14 (LGS) because of its excellent acoustic properties (temperature compensation of acoustic losses). Since LTG single crystals can be grown from a stoichiometric melt, it was expected that single crystals with better quality than the LGS crystal, which cannot be grown from a stoichiometric system but only from a congruent melt, can be obtained. However, 60 keV X-ray topography revealed that the LTG crystal quality was not as high as the LGS crystal quality. The crystal quality of the central region was lower than that of the surrounding region. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optical properties of Pb(Zr,Ti)O3 films prepared by aerosol deposition

    Publication Year: 2008 , Page(s): 975 - 979
    Cited by:  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (347 KB) |  | HTML iconHTML  

    The optical properties and related band structure of ferroelectric lead zirconate titanate [PZT, Pb(Zr0.6Ti0.4)O3] films prepared on glass substrates at room temperature by aerosol deposition were investigated. The reflectance and transmittance of the PZT films were measured in the wavelength range from UV to near-infrared. The measured optical spectra were analyzed using dielectric function models that describe optical transitions in the band gap region. Optical absorption of the as-deposited PZT films was found to be larger than that of the annealed PZT films in the near-infrared wavelength range. The analyzed results indicated that post-deposition annealing increased the band gap energy of the PZT films, corresponding to a decrease in optical absorption. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Enhancement of Qm by co-doping of Li and Cu to potassium sodium niobate lead-free ceramics

    Publication Year: 2008 , Page(s): 980 - 987
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1440 KB) |  | HTML iconHTML  

    Lead-free piezoelectric ceramics KNN modified by Li-substitution and CuO addition have been synthesized, and the piezoelectric and dielectric properties were measured. A morphotropic phase boundary (MPB) between orthorhombic and tetragonal phases was formed with Li-substitution. The co-doping of Li and Cu markedly enhanced the mechanical quality factor (Qm) in comparison with the sole doping of Li and Cu. Anomalous anti-ferroelectric-like hysteresis curves were observed in 2 mol% CuO-doped ceramics. The anti-ferroelectric-like curves were changed to that of normal ferroelectrics following poling. A model based on the formation of the internal bias field (Ei) due to the movements of space charges was proposed to explain these phenomena. It was considered that the Ei stabilized the spontaneous polarization (Pa) and suppressed the domain wall motion to enhance the Qm. The highest Qm obtained in this study was 742. The [(Na0.5K0.5)0.96Li0.04] NbO3 + 0.45 mol% CuO ceramics showed a high Qm value of 414 with a high piezoelectric constant d33 of 100 pC/N. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fabrication of lead-free piezoelectric (Na0.5K0.5)NbO3 ceramics by a modified solid-state reaction method

    Publication Year: 2008 , Page(s): 988 - 993
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (754 KB) |  | HTML iconHTML  

    Sodium potassium niobate, (Na0.5K0.5)NbO3, fine powder has been successfully synthesized at the low temperature of 550degC through a modified solid-state reaction method, in which urea [CO(NH2)2] plays an important role. High-density (Na0.5K0.5)NbO3 ceramics could be obtained by conventional sintering of the synthesized (Na0.5K0.5)NbO3 fine powder with the addition of 0.03 mol% Co3O4 as a sintering additive. The crystal structure, microstructure, and dielectric and piezoelectric properties were characterized. The (Na0.5K0.5)NbO3 ceramic showed a comparatively saturated P-E hysteresis loop. The (Na0.5K0.5)NbO3 ceramic also displayed piezoelectricity with a piezoelectric constant d33 of 126 pC/N and a planar electromechanical coupling factor kp of 33%. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Effect of V2O5 on the sintering behavior, microstructure, and electrical properties of (Na0.5K0.5)NbO3 ceramics

    Publication Year: 2008 , Page(s): 994 - 999
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (911 KB) |  | HTML iconHTML  

    Well-sintered (Na0.5K0.5)NbO3-x mol% V2O5 ceramics (abbreviated as NKN-V) with fine electrical properties were successfully prepared by conventional solid-state reaction through the careful control of processing conditions. The sintering behavior, phase structure, and electrical properties of the V2O5-doped NKN ceramics were investigated. Results show that when the V2O5 content is 0.6 mol%, the NKN ceramics attained the maximum density of 4.46 g/cm3 (about 98.9% of the theoretical density) at 1060degC, and therefore possessed enhanced electrical properties. But when the V2O5 content continued increasing, the density decreased. The secondary phase (Na2V6O16) could be detected by XRD analysis in all samples except x = 0 mol%. The Curie temperature of the NKN-based materials was found to decrease with the increase of V2O5. The dielectric properties of NKN ceramics doped with 0.6 and 0.9 mol% V2O5 were better than that of pure NKN ceramics. In addition, annealing treatment was proved to be an effective technique for improving dielectric properties and reducing the leakage current density. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Piezoelectricity of chiral polymeric fiber and its application in biomedical engineering

    Publication Year: 2008 , Page(s): 1000 - 1008
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (974 KB) |  | HTML iconHTML  

    Poly-L-lactic acid (PLLA), which is a type of chiral polymer, exhibits a high shear piezoelectric constant. To realize a higher shear piezoelectric constant, we spun PLLA resin into fibers. We succeeded in controlling the piezoelectric motion of a PLLA fiber by applying a dc voltage and ac voltage, similar to the control of a piezoelectric actuator. On the basis of this experimental result, we designed a catheter using a PLLA fiber (PLLA fiber catheter) and tweezers using a pair of PLLA fibers (PLLA fiber tweezers), controlled by adjusting the applied voltage. Then, using the PLLA fiber tweezers or catheter, we successfully picked up and removed small samples, such as a thrombosis in a blood vessel. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Thickness dependence of electrical properties of PZT films deposited on metal substrates by laser-assisted aerosol deposition

    Publication Year: 2008 , Page(s): 1009 - 1016
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1133 KB) |  | HTML iconHTML  

    Dependence of electrical properties-dielectric, ferroelectric, and piezoelectric properties-on film thickness was studied for lead-zirconate-titanate (PZT) thick films directly deposited onto stainless-steel (SUS) substrates in actuator devices by using a carbon dioxide (CO2), laser-assisted aerosol deposition technique. Optical spectroscopic analysis data and laser irradiation experiments revealed that absorption at a given wavelength by the film increased with increasing film thickness. Dielectric constant epsiv, remanent polarization value Pr, and coercive field strength Ec of PZT films directly deposited onto a SUS-based piezoelectric actuator substrate annealed by CO2 laser irradiation at 850degC improved with increasing film thickness, and for films thicker than 25 mum, e > 800, Pr > 40 muC/cm2, and Ec < 45 kV/cm. In contrast, the displacement of the SUS-based actuator with the laser-annealed PZT thick film decreased with increasing film thickness. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Preparation of ferroelectric NaNbO 3/thin films on MgO substrate by pulsed laser deposition

    Publication Year: 2008 , Page(s): 1017 - 1022
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (755 KB) |  | HTML iconHTML  

    We successfully fabricated good quality NaNbO3 (NN) films on MgO substrate by pulsed laser deposition using a K-Ta-O (KTO) buffer layer. An SrRuO3 (SRO) lower electrode layer was deposited on a KTO buffer layer/(100)MgO substrate and then the NN film was deposited on top. X-ray diffraction showed that the SRO and NN films were epitaxially grown on (100)MgO substrate. Transmission electron microscopy showed a crystal- lographic relationship of [001]NN//[001]MgO between NN and MgO. The relative dielectric constant, epsivr, and dielectric loss, tan delta, of the film were 350 and 0.05 at 1 kHz, respectively. The polarization vs. electric field (P-E) hysteresis loop of the NN film was characteristic of ferroelectric behavior. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fabrication and optical properties of Pb(Mg1/3Nb2/3)O3-PbTiO3 thin films on Si substrates using the PLD method

    Publication Year: 2008 , Page(s): 1023 - 1028
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (441 KB) |  | HTML iconHTML  

    Epitaxial 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3 (PMN-PT) thin films with electro-optic effects were fabricated on (La0.5Sr0.5)CoO3(LSCO)/CeO2/YSZ-buffered Si(001) substrates using double-pulse excitation pulsed laser deposition (PLD) method with a mask placed between the target and the substrate. Epitaxial growth of PMN-PT thin films was undertaken using the two-step growth method of PMN-PT film. The PMN-PT seed layer was deposited at 500degC on the LSCO/CeO2/YSZ/Si, which temperature was the same as that used for LSCO deposition. The PMN-PT thin films were deposited on the PMN-PT seed layer at 600degC, which enables growth of high-crystallinity PMN-PT films with smooth surfaces. We obtained optimum fabrication conditions of PMN-PT film with micrometer-order thickness. Resultant films showed high crystallinity with full width at half maximum (FWHM)=0.73 deg and 1.6 mum thickness. Electro-optic properties and the refractive index value were measured at 633 nm wavelength using the prism coupling method. The obtained refractive index was 2.59. The electro-optic coefficients r13 and r33 were determined by applying the electrical field between a semitransparent, thin top electrode of Pt and a bottom LSCO electrode. The electro-optic coefficient was r13=17 pm/V at transverse electric field (TE) mode and r33=55 pm/V at transverse magnetic field (TM) mode. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The dielectric properties of Ba0.6Sr0.4CrxTi1-xO3 thin films prepared by pulsed laser deposition

    Publication Year: 2008 , Page(s): 1029 - 1033
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (722 KB) |  | HTML iconHTML  

    Ba0.6Sr0.4CrxTi1-xO3 (BSCT) films were prepared by pulsed laser deposition with the value of x varying from 0 mol% to 2.0 mol%. X-ray diffraction analysis detected an increase in the lattice parameters, which could be due to the characteristics of the growth process. Dielectric properties and tunability of the BSCT films were measured. The dissipation factors of the films decreased with increasing Cr-concentration. The highest figure of merit (FOM) value of 33.3 was obtained in 1.0 mol%-doped BSCT film. As a result, the effect of Cr doping is positive. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Effects of the sol-concentration on the structural and dielectric properties of Pb0.3Sr0.7TiO3 thin films derived by the sol-gel method

    Publication Year: 2008 , Page(s): 1034 - 1037
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1074 KB) |  | HTML iconHTML  

    Pb0.3Sr0.7TiO3(PST) thin films were deposited on Pt coated Si(100) substrates by sol-gel techniques using different sol-concentrations. The structural and dielectric characteristics of lead strontium titanate (PST) thin films as a function of the sol-concentration were investigated. PST thin films reveal a columnar texture through the thickness when the sol-concentration is lower than 0.30 M. PST thin films derived from 0.35 M sol show better dielectric characteristics with the dielectric constant, dielectric loss, tunability, and field of motion (FOM) (tun- ability/dissipation) of 200, 0.01, 47% and 47, respectively. The temperature dependence of the dielectric constant, dielectric loss and tunability of PST thin films were investigated in the temperature range of -140 to 120degC exhibiting a dielectric peak of about -45degC. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dielectric properties of Ni-coated BaTiO3-PMMA composite

    Publication Year: 2008 , Page(s): 1038 - 1042
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (599 KB) |  | HTML iconHTML  

    Dielectric properties of Ni-coated BaTiO3- PMMA (polymethyl methacrylate) composite were studied from an embedded capacitor application viewpoint. Volume loading of up to 50% was attempted, and the results were compared with uncoated BaTiO3-PMMA composite. Ni-coating on BaTiO3 powder was found to greatly improve the dielectric properties of the composite, especially the dielectric constant value. K values of about 100 with temperature-stable X7E characteristics were realized. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control focuses on the theory, design, and application on generation, transmission, and detection of bulk and surface mechanical waves.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Steven Freear
s.freear@leeds.ac.uk