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  • 1
    Electronic Resource
    Electronic Resource
    Crystallization kinetics and structural aspects of TeGaSn amorphous alloys (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 3276-3284 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Cast and rapidly quenched samples of ternary system GaTeSn in the Te rich corner were studied by means of x-ray diffraction, 119Sn Mössbauer spectrometry at 77 K, and differential scanning calorimetry. The crystallization products, the activation energy, the crystallization enthalpy, and the crystallization and glass temperatures of the amorphous phases are reported. The addition of Sn to GaTe increases the glass forming range of the binary system and the thermal stability of the amorphous phase. In the crystalline samples the divalent Sn atoms are always surrounded by Te in octahedrally coordinated environments. It is observed that the addition of Sn, above a threshold concentration, stabilizes the high temperature phase Ga2Te5 at room temperature. The Mössbauer spectra obtained on amorphous samples indicate two kinds of environments at Sn sites: one ascribed to the octahedral coordination, the other one to Sn surrounded by Te with tetrahedral coordination. The Mössbauer results are related to the calorimetric measurements: the role of Sn to stabilize the amorphous structure is discussed. The first steps of the crystallization of pure Te are modeled assuming homogeneous nucleation followed by three-dimensional interface-controlled growth of the crystal. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1288691
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  • 2
    Electronic Resource
    Electronic Resource
    Electro-optical properties of a single domain PbTiO3 crystal (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 2102-2106 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The electro-optic coefficient rc has been measured at low frequency in a single crystal of PbTiO3. Linear and quadratic polarization optic coefficients are derived from this value of rc and from the electric properties measured on the same crystal. Figures of merit for modulator application and the thermo-optic coefficient are determined in PbTiO3 and are compared with those in other electro-optic materials. Results show that PbTiO3 can be interesting for electro-optic applications. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358853
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  • 3
    Electronic Resource
    Electronic Resource
    Electro-optic properties in pure LiNbO3 crystals from the congruent to the stoichiometric composition (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 84 (1998), S. 2251-2254 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report large and nonmonotonic dependences of the electro-optic (EO) coefficient r22 and the corresponding dielectric permittivity in pure LiNbO3 on the concentration of intrinsic defects related to the deviation from the stoichiometry of the crystal. This variation is caused mainly by the electro-mechanical contribution. A stoichiometric crystal possesses both large EO properties and resistance to optical damage which renders it much more suitable for use in laser Q-switching than the congruent crystal. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.368290
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of the temperature-dependent spontaneous birefringence in the electro-optic measurements of LiNbO3 (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 2406-2408 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In spite of the large utilization of LiNbO3 in optical devices, its electro-optic coefficients are not perfectly known. We show in the present paper that not taking into account the temperature dependence of the linear spontaneous birefringence can lead to an erroneous determination of the electro-optic coefficients. The electro-optic coefficient rc of LiNbO3 has been determined by an accurate technique issued from the Sénarmont method. At room temperature, rc=19.9×10−12 m/V, with an estimated error of ±5%. The measurements are performed for values of the dc applied electric field as a function of the temperature around room temperature. We point out the drastic influence on the electro-optic response of the spontaneous birefringence variation due to the temperature. Accurate and reproducible values of the electro-optic coefficients are obtained only if this dependence is taken into account.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342809
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  • 5
    Electronic Resource
    Electronic Resource
    New material with strong electro-optic effect: Rubidium hydrogen selenate (RbHSeO4) (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 1920-1922 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A very large electro-optic Pockels coefficient is reported in a crystal of rubidium hydrogen selenate. This new material is found to be promising for modulation applications because of its very low half-wave voltage (∼27 V) which is determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.111742
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  • 6
    Electronic Resource
    Electronic Resource
    Determination of Oxygen and Nitrogen in Steel (1935)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 7 (1935), S. 391-395 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac50098a012
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  • 7
    Electronic Resource
    Electronic Resource
    Thickness-dependent melting transition in Langmuir–Blodgett films (1999)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 111 (1999), S. 5562-5567 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Fatty acid Langmuir–Blodgett films, a quartz crystal microbalance, and Fourier-transform infrared dichroism have been used to study the evolution of the melting transition upon the variation of the sample thickness, from bulk to a few monolayers. Whereas ordinary bulk behavior was observed for samples all the way down to n=12 layers, a crossover range of 12≤n≤8 was identified to a continuous transition, characterized also by the existence of an intermediate orientationally ordered phase. Measurements on annealed samples indicated the strong sensitivity of such a phase and the order of the transition to defects and sample metastability. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.479815
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  • 8
    Electronic Resource
    Electronic Resource
    THERMAL DIFFUSION OF GASES NEAR A HOT METAL SURFACE (1934)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 56 (1934), S. 2011-2011 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01324a510
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  • 9
    Electronic Resource
    Electronic Resource
    A New Approximate Equation for Heat Capacities at High Temperatures (1935)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 57 (1935), S. 48-51 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01304a015
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  • 10
    Electronic Resource
    Electronic Resource
    Molecular reorientations and local structure in nitrate aqueous solutions (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 6406-6415 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We present an experimental study of anionic reorientational dynamics in Cu(NO3)2 and Ca(NO3)2 aqueous solutions. The anion reorientational autocorrelation time τor has been obtained by Fourier band shape analysis of the Raman 1050 cm−1 N–O stretching vibration line and by a multiple Lorentzian fitting of the depolarized Rayleigh wing spectrum. Its evolution as a function of solute concentration and of the nature of the counterion present (Cu2+, Ca2+) has been analyzed. Deviations from the Stokes–Einstein proportionality relation between Raman reorientational correlation times and the values of shear viscosity of the system have been used to obtain the microscopic structure contribution to the viscosity itself. From the depolarized Rayleigh wing spectra we have been able to investigate the contributions of both water and the nitrate ion to the reorientational relaxation in the solutions and to assess the contribution of collective effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453471
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