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  • 1990-1994
  • 1985-1989
  • 1975-1979  (3)
  • 1955-1959
  • 1978  (3)
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  • 1990-1994
  • 1985-1989
  • 1975-1979  (3)
  • 1955-1959
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    On Hall voltage and change of conductivity in transverse magnetic fields of pressed PbO2 powder (1978)
    Springer
    Applied physics 17 (1978), S. 193-197 
    Details
    ISSN: 1432-0630
    Keywords: 73
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The electrical conductivity of a conducting powder is influenced by the properties of the grain surface as well as the grain core. By appropriate variation of pressure and electric frequency, the two contributions can be separated, as long as the grains have shapes nearly like spheres. From experimental data on pressed powders one can thus obtain information concerning carrier density and mobility of bulk material. Results for PbO2 obtained in this way agree well with the properties of bulk PbO2 samples reported in the literature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00885255
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Finite element analysis of a quasistatic crack extension in a unit cell of a fiber-reinforced material (1978)
    Springer
    International journal of fracture 14 (1978), S. R3 
    Details
    ISSN: 1573-2673
    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/BF00032391
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Superconducting properties of Nb3Ge thin films prepared by cosputtering (1978)
    Springer
    Journal of low temperature physics 33 (1978), S. 87-104 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Nb3Ge films with thicknesses between 0.5 and 1.5 Μm have been deposited on heated sapphire substrates by dc sputtering in a pure argon atmosphere. With a maximum superconducting onset temperature T c= 22.7 K, these high-T csamples crystallize in a single-phase A15 structure with lattice parameters down to 5.14 ». Critical current densities and upper critical magnetic inductions have been measured as a function of magnetic field orientation, temperature, and film thickness. The anisotropies of the critical currents and fields depend on the microstructure of the samples and show maxima for the field orientation normal to the sample surface in those films that exhibit columnar growth of the crystallites normal to the substrate. The temperature, field, and angular dependences of the pinning forces in these films are compared to existing pinning theories.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00117068
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    Paper (German National Licenses)
    Fulltext
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