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  • 1
    Electronic Resource
    Electronic Resource
    Crystal structure of proton-exchanged LiNbO3 waveguides (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 871-873 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is generally agreed that the crystal structure of proton-exchanged LiNbO3 waveguides is not consistent with the Li1−xHxNbO3 phase diagram established using powder samples. We propose a simple strain model to remove such anomaly and show that the proton-exchanged layer on a LiNbO3 substrate is in a strained β (triple-prime) phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357762
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  • 2
    Electronic Resource
    Electronic Resource
    Specific heat and thermal diffusivity of strontium barium niobate (Sr1−xBaxNb2O6) single crystals (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 170-173 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The specific heat and thermal diffusivity of Sr1−xBaxNb2O6 (x=0.33 and 0.48) single crystals have been measured between 130 and 500 K, and the sound velocity has been measured at 295 K. At x=0.33 the specific heat shows a broad peak at 335 K, indicating the onset of a ferroelectric phase transition. The peak sharpens and shifts to about 383 K at x=0.48. A jump in the thermal diffusivity D is observed at the transition. Away from the transition, however, D is roughly independent of temperature. There is very little anisotropy in D, with the value along the a axis marginally higher than that along the c axis. Outside the transition region the phonon mean free path l is approximately constant, and has values of 5.1 and 5.6 A(ring), respectively, below and above the transition. The low values of D and l are due to the disorder arising from the random distribution of five Sr/Ba ions over six possible sites in a unit cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350732
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  • 3
    Electronic Resource
    Electronic Resource
    The influence of electron-hole density profile on the picosecond time-resolved reflectivity measurement in silicon (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 5031-5034 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The influence of the spatial distribution of electron-hole plasma on reflectivity measurement is studied in this paper. The plasma density deduced from the reflectivity measurement represents the surface density satisfactorily, if the pump penetration depth is not too short compared with probe wavelength. Besides, when plasma resonance does not take place, the probe incident angle should not be close to Brewster's angle [see, for example, M. Born and E. Wolf, Principles of Optics, 6th ed. (Pergamon, New York, 1980), p. 43] for exponential-like plasma density distribution; otherwise, when the phasma resonance takes place, strong nonlinear recombination and diffusion should be present. In other cases, a general applicable method for data processing is suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.343177
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  • 4
    Electronic Resource
    Electronic Resource
    Surface segregation of bulk oxygen on oxidation of epitaxially grown Nb-doped SrTiO3 on SrTiO3(001) (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 2889-2891 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We studied the epitaxy of 10 mol % Nb:SrTiO3 on a SrTiO3(100) substrate under an interrupted pulsed-laser-deposition condition. By monitoring the recovery behaviors of reflection high-energy electron diffraction intensity and an optical reflectance difference signal from the growth surface, we observed that, at temperatures above 630 °C, the oxidation of an as-deposited Nb:SrTiO3 monolayer was achieved by the diffusion of oxygen vacancies in the monolayer into the substrate. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1473694
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  • 5
    Electronic Resource
    Electronic Resource
    Oscillation phenomena in the galactic bulge X-ray source GX 9 + 1
    Amsterdam : Elsevier
    Chinese Astronomy and Astrophysics 18 (1994), S. 426-428 
    Details
    ISSN: 0275-1062
    Keywords: galactic bulge-X-ray source-oscillation
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0275-1062(94)90009-4
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  • 6
    Electronic Resource
    Electronic Resource
    Thermal properties of bismuth germanate Bi4Ge3O12 (1989)
    Springer
    Journal of materials science 8 (1989), S. 1317-1319 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00721506
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  • 7
    Electronic Resource
    Electronic Resource
    Some binary and ternary silicate solution models (1986)
    Springer
    Contributions to mineralogy and petrology 94 (1986), S. 221-229 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Four different solution models, the two-parameter Margules, the quasi-chemical (QC), the Wilson and the non-random two-liquid (NRTL) model, have been used for fitting the calorimetric excess enthalpy of solution for the following four binary silicate systems: anorthite-albite, pyrope-grossular, diopside-enstatite and diopside-Ca-Tschermak. All models except the Wilson model yield a satisfactory fit to the data but the NRTL model generally results in the lowest residuals. The use of NRTL and QC facilitates the study of the configurational and non-configurational parts of the excess entropy of mixing. Three different methods, namely those of Kohler, Wohl, and Hillert, have been used to combine binary solution properties to predict ternary solution properties. Comparison of computed excess free energy of mixing in a hypothetical solution shows that all the three methods are viable but the Kohler and Wohl methods are similar to each other and are significantly different from the Hillert method. The Kohler method with one or a combination of different binary models is recommended for predicting multicomponent solution properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00592938
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  • 8
    Electronic Resource
    Electronic Resource
    Fluids at crustal pressures and temperatures (1987)
    Springer
    Contributions to mineralogy and petrology 95 (1987), S. 370-375 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The pressure-volume-temperature data of several gases (H2, O2, CO, CH4, N2 and CO2) have been used to obtain the following corresponding states equation (P〉1 kbar; T〉400 K): Z(±0.0878)=A+BP r +CP r /2 (21) where Z is the compressibility factor, P r reduced pressure (P/critical P), T r reduced temperature (T/critical T) and the coefficients are given by: A=1−0.5917 T r /−2 B=0.09122 T r /−1 C=1.4164×10−4 T r /−2 −2.8349×10−6 ln T r (P〉1 kbar; T〉400 K). At pressures below 1 kbar, Z is given by: Z(±0.0761)=1+BP r +CP r /2 (23) where B=0.09827 T r /−1 −0.2709 T r /−3 C=0.01472 T r /−4 −0.00103 T r /−1.5 . For water (P〉1 kbar; T〉400 K): Z(±0.0209)=A+BP+CP 2 (22) where A=−0.7025+1.16×10−3 T+99.6799 T −1 B=0.2143 T −1−3.1423×10−14 T 3 C=−2.249×10−6 T −1−0.1459 T −3+2.1690×10−15 T 2. At pressure below 1 kbar, the equation is (P〉100 bar; T 〉673 K): Z(±0.0601)=1+B′/V+C′/V 2 (24) where B′=−2.20960 T0.5+3.35460×10−8 T3 C′=3.4569×10−5T2.5+64.9764 ln T Fugacities of the gases may be obtained by integrating the Z equations separately and combining the results as follows: (26) $$\int\limits_1^P {VdP = RT} {\text{ }}\left( {\int\limits_1^{1000} {Z_{23} /PdP + } \int\limits_{1000}^1 {Z_{21} /PdP} } \right)$$ The subscript in Z denotes the equation which is to be used for calculating Z.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00371850
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  • 9
    Electronic Resource
    Electronic Resource
    Static compression of the hydrous magnesium silicate phase D to 30 GPa at room temperature (1999)
    Springer
    Physics and chemistry of minerals 26 (1999), S. 415-418 
    Details
    ISSN: 1432-2021
    Keywords: Key words Phase D ; Bulk modulus ; Diamond anvil ; High pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract  Phase D is a dense hydrous magnesium silicate (ideal formula MgSi2H2O6) which contains silicon cations exclusively in octahedral coordination. Measurements of the unit cell parameters of phase D were made to pressures of 30 GPa using a diamond anvil cell and employing synchrotron X-ray diffraction. A neon pressure medium was used. Using a third order Birch-Murnaghan equation of state the isothermal bulk modulus of phase D was determined as 166(±3) GPa with K′ equal to 4.1(±0.3). The compression of phase D is anisotropic with the c-axis twice as compressible as the a-axis. Above 20 GPa, however, the c/a ratio becomes pressure independent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002690050202
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  • 10
    Electronic Resource
    Electronic Resource
    Hydrostatic compression of γ-Mg2SiO4 to mantle pressures and 700 K: Thermal equation of state and related thermoelastic properties (1994)
    Springer
    Physics and chemistry of minerals 21 (1994), S. 407-412 
    Details
    ISSN: 1432-2021
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract P-V-T equations of state for the γ phase of Mg2SiO4 have been fitted to unit cell volumes measured under simultaneous high pressure (up 30 GPa) and high temperature (up to 700 K) conditions. The measurements were conducted in an externally heated diamond anvil cell using synchrotron x-ray diffraction. Neon was used as a pressure medium to provide a more hydrostatic pressure environment. The P-V-T data include 300 K-isothermal compression to 30 GPa, 700 K-compression to 25 GPa and some additional data in P-T space in the region 15 to 30 GPa and 300 to 700 K. The isothermal bulk modulus and its pressure derivative, determined from the isothermal compression data, are 182(3) GPa and 4.2(0.3) at T=300 K, and 171(4) GPa and 4.4(0.5) at T=700 K. Fitting all the P-V-T data to a high-temperature Murnaghan equation of state yields: K TO=182(3.0) GPa, K TO=4.0(0.3), ∂K T /∂T)0=−2.7(0.5)×10−2 GPa/K and (∂2 K T /∂P∂T)0=5.5(5.2)×10−4/K at the ambient condition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00203299
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