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  • Chemical Engineering  (1)
  • PACS. 75.50.Ee Antiferromagnetics – 63.20.Dj Phonon states and bands, normal modes, and phonon dispersion  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Infrared spectra and lattice vibrations of the spin-chain compound LiCuVO 4 (2001)
    Springer
    The European physical journal 23 (2001), S. 427-435 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 75.50.Ee Antiferromagnetics – 63.20.Dj Phonon states and bands, normal modes, and phonon dispersion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The infrared spectra of the one-dimensional antiferromagnet LiCuVO4 are measured in the frequency range from 10 cm-1 to 10 000 cm-1 and at temperatures from 2 K to 300 K, for the electric field vector E of the radiation polarized either along the a- or along the b-crystallographic directions. For each polarization six infrared active phonon modes are observed in accordance with factor group analysis of the crystal structure of LiCuVO4. The theoretical group analysis of the possible spinel low-symmetry phases is performed within the framework of Landau's theory of phase transitions. The parameters of several phonon lines show noticeable anomalies around 150 K where the magnetic correlations appear in the copper chains, which may indicate a finite interaction between the phonon and the magnon subsystems in LiCuVO4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510170033
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  • 2
    Electronic Resource
    Electronic Resource
    Turbulent dispersion of aqueous drops in organic liquids (1987)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 33 (1987), S. 987-995 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Drops sizes for turbulent dispersion of aqueous solutions in organic liquids were determined and correlated for three types of dispersion devices: small-diameter tubes, motionless mixer units, and a rotating annular disperser with Couette flow. Empirical correlation based on dimensional analyses were useful for application of these devices to gel-sphere processes. The results support the Kolmorogoff theory of turbulence as a dispersion mechanism for a range of 104 for the rate of energy dissipation.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690330611
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    Paper (German National Licenses)
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