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Bipolar piezoelectric fatigue of Bi(Zn0.5Ti0.5)O3-(Bi0.5K0.5)TiO3-(Bi0.5Na0.5)TiO3 Pb-free ceramics

Creator:: Patterson, Eric A. and Cann, David P.
Abstract:: The piezoelectric fatigue behavior of Pb-free ceramics based on solid solutions of Bi(Zn₀.₅Ti₀.₅)O₃-(Bi₀.5K₀.₅)TiO₃-(Bi₀.₅Na₀.₅)TiO₃ was characterized at 50 kV/cm after 10⁶ bipolar cycles. Ferroelectric compositions containing 2.5% Bi(Zn₀.₅Ti₀.₅)O₃ exhibited only minor losses in maximum strain (~10%). In compositions with 5% Bi(Zn₀.₅Ti₀.₅)O₃ that exhibit large electric field-induced strains, the electromechanical strain actually...
Resource Type:: Article
Full Text:: - (Bi0.5Na0.5)TiO3 Pb-free ceramics Eric A. Patterson and David P. Cann Citation: Appl. Phys. Lett. 101

Effects of ZrO₂ additions on the dielectric properties of CaCu₃Ti₄O₁₂

Creator:: Patterson, Eric A., Kwon, Seunghwa, Huang, Chien-Chih, and Cann, David P.
Abstract:: The dielectric spectra of CaCu₃Ti₄O₁₂ is characterized by a large permittivity (εᵣ>10 000) with only a weak dependence on temperature over the temperature range 200–400 K. In this work, doping with 0.1–1.0 wt % ZrO₂ has been shown to dramatically reduce the dielectric loss. At 0.5 wt % ZrO₂, tan...
Resource Type:: Article
Full Text:: additions on the dielectric properties of CaCu3Ti4O12 Eric A. Patterson Department of Materials Science and

Defect mechanisms in high resistivity BaTiO₃–Bi(Zn₁/₂Ti₁/₂)O₃ ceramics

Creator:: Raengthon, Natthaphon, DeRose, Victoria J., Brennecka, Geoffrey L., and Cann, David P.
Abstract:: The defect mechanisms that underpin the high energy density dielectric 0.8BaTiO₃–0.2Bi(Zn₁/₂Ti₁/₂) O₃ were investigated. Characterization of the nominally stoichiometric composition revealed the presence of a Ti³⁺-related defect center, which is correlated with lower resistivities and an electrically heterogeneous microstructure. In compositions with 2 mol. % Ba-deficiency, a barium vacancy-oxygen vacancy...
Resource Type:: Article

Room temperature multiferroic properties of single-phase (Bi₀.₉La₀.₁)FeO₃-Ba(Fe₀.₅Nb₀.₅)O₃ solid solution ceramics

Creator:: Paik, Hanjong, Hwang, Hosung, No, Kwangsoo, Kwon, Seunghwa, and Cann, David P.
Abstract:: The crystal structure and multiferroic properties of single-phase (Bi₀.₉La₀.₁)FeO₃–Ba(Fe₀.₅Nb₀.₅)O₃ ceramics were investigated. The rhombohedral-type structure of 1.0(Bi₀.₉La₀.₁)FeO₃) was transformed to a monoclinic-type structure for the 0.5(Bi₀.₉La₀.₁)FeO₃–0.5Ba(Fe₀.₅Nb₀.₅)O₃) composition. It shows the coexistence of ferroelectricity and magnetism at room temperature, represented by a high dielectric constant with ferroelectric hysteresis and clear magnetic...
Resource Type:: Article
Full Text:: „Bi0.9La0.1…FeO3–Ba„Fe0.5Nb0.5…O3 solid solution ceramics Hanjong Paik,a� Hosung Hwang, and Kwangsoo No

Multilayer ceramic capacitors based on relaxor BaTiO₃-Bi(Zn₁/₂Ti₁/₂)O₃ for temperature stable and high energy density capacitor applications

Creator:: Kumar, Nitish, Ionin, Aleksey, Ansell, Troy, Kwon, Seongtae, Hackenberger, Wesley, and Cann, David
Abstract:: The need for miniaturization without compromising cost and performance continues to motivate research in advanced capacitor devices. In this report, multilayer ceramic capacitors based on relaxor BaTiO₃-Bi(Zn₁/₂Ti₁/₂)O₃ (BT-BZT) were fabricated and characterized. In bulk ceramic embodiments, BT-BZT has been shown to exhibit relative permittivities greater than 1000, high resistivities (ρ > 1...
Resource Type:: Article
Full Text:: energy density capacitor applications Kumar, N., Ionin, A., Ansell, T., Kwon, S., Hackenberger, W

Measurement of high carrier mobility in graphene in an aqueous electrolyte environment

Creator:: Brown, Morgan A., Crosser, Michael S., Leyden, Matthew R., Qi, Yabing, and Minot, Ethan D.
Abstract:: Graphene is a promising material for applications in aqueous electrolyte environments. To explore the impact of such environments on graphene's electrical properties, we performed Hall bar measurements on electrolyte-gated graphene. Assuming a Drude model, we find that the room temperature carrier mobility in water-gated, SiO₂-supported graphene reaches 7000 cm²/Vs, comparable to...
Resource Type:: Preprint and Article
Full Text:: aqueous electrolyte environment Morgan A. Brown, 1 Michael S. Crosser, 2 Matthew R. Leyden, 3

p-type conductivity in wide-band-gap BaCuQF (Q=S,Se)

Creator:: Yanagi, Hiroshi, Tate, Janet, Park, Sangmoon, Park, Cheol-Hee, and Keszler, Douglas A.
Abstract:: BaCuQF (Q=S,Se) materials, candidate transparent p-type conductors, were prepared by solid-state reaction, and their bulk electrical and optical properties were evaluated. The room-temperature Seebeck coefficient and electrical conductivity of undoped BaCuQF pellets were +56 μV/K and 0.088 S/cm, respectively, for the sulfide fluoride, and +32 μV/K and 0.061 S/cm, respectively,...
Resource Type:: Article
Full Text:: Physics, Oregon State University, Corvallis, Oregon 97331 Sangmoon Park, Cheol-Hee Park, and Douglas A

High mobility transparent thin-film transistors with amorphous zinc tin oxide channel layer

Creator:: Chiang, H. Q., Wager, J. F., Hoffman, R. L., Jeong, J., and Keszler, Douglas A.
Abstract:: Transparent thin-film transistors (TTFTs) with an amorphous zinc tin oxide channel layer formed via rf magnetron sputter deposition are demonstrated. Field-effect mobilities of 5–15 and 20–50 cm² V‾¹ s‾¹ are obtained for devices post-deposition annealed at 300 and 600 °C, respectively. TTFTs processed at 300 and 600 °C yield devices...
Resource Type:: Article
Full Text:: Company, 1000 NE Circle Boulevard, Corvallis, Oregon 97330-4239 J. Jeong and D. A. Keszler Department of

Characterization of fatigue-induced free volume changes in bulk metallic glass using positron annihilation spectroscopy

Creator:: Vallery, R. S., Liu, M., Gidley, D. W., Launey, M. E., and Kruzic, J. J.
Abstract:: Depth-profiled Doppler broadening spectroscopy of positron annihilation on the cyclic fatigue-induced fracture surfaces of three amorphous Zr₄₄Ti₁₁Ni₁₀Cu₁₀Be₂₅ metallic glass specimens reveals the presence of a 30–50 nm layer of increased free volume that is generated by the propagating fatigue crack tip. The presence and character of this fatigue transformation zone...
Resource Type:: Article
Full Text:: Characterization of fatigue-induced free volume changes in a bulk

Generation of multicycle terahertz pulses via optical rectification in periodically inverted GaAs structures

Creator:: Lee, Yun-Shik, Hurlbut, Walter C., Vodopyanov, K. L, Fejer, M. M., and Kozlov, V. G.
Abstract:: The authors demonstrate the generation of multicycle narrow-bandwidth terahertz pulses in periodically inverted GaAs structures using optical rectification of 2 μm, 100 fs pump pulses. Three different types of orientation-inverted samples are employed: optically contacted multilayer, orientation-patterned, and diffusion-bonded GaAs. The terahertz pulses are characterized by two-color (pump at 2...
Resource Type:: Article
Full Text:: femtosecond lasers matches terahertz group velocities. Consequently, a terahertz pulse generated in ZnTe has a

ScholarsArchive@OSU

Bipolar piezoelectric fatigue of Bi(Zn0.5Ti0.5)O3-(Bi0.5K0.5)TiO3-(Bi0.5Na0.5)TiO3 Pb-free ceramics

Effects of ZrO₂ additions on the dielectric properties of CaCu₃Ti₄O₁₂

Defect mechanisms in high resistivity BaTiO₃–Bi(Zn₁/₂Ti₁/₂)O₃ ceramics

Room temperature multiferroic properties of single-phase (Bi₀.₉La₀.₁)FeO₃-Ba(Fe₀.₅Nb₀.₅)O₃ solid solution ceramics

Multilayer ceramic capacitors based on relaxor BaTiO₃-Bi(Zn₁/₂Ti₁/₂)O₃ for temperature stable and high energy density capacitor applications

Measurement of high carrier mobility in graphene in an aqueous electrolyte environment

p-type conductivity in wide-band-gap BaCuQF (Q=S,Se)

High mobility transparent thin-film transistors with amorphous zinc tin oxide channel layer

Characterization of fatigue-induced free volume changes in bulk metallic glass using positron annihilation spectroscopy

Generation of multicycle terahertz pulses via optical rectification in periodically inverted GaAs structures

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