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  • Electronic Resource  (2)
  • 2000-2004  (1)
  • 1975-1979  (1)
  • 1960-1964
  • 2000  (1)
  • 1975  (1)
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  • Electronic Resource  (2)
Years
  • 2000-2004  (1)
  • 1975-1979  (1)
  • 1960-1964
Year
  • 1
    Electronic Resource
    Electronic Resource
    Piezoelectric effect and the long-term resistance relaxations induced by uniaxial compression in p-GaAs/AlxGa1−x as heterostructures (2000)
    Springer
    Journal of experimental and theoretical physics 91 (2000), S. 1250-1260 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Long-term resistance relaxations induced by uniaxial compression in (001)p-GaAs/Al0.5Ga0.5 As heterostructures are observed, and the main properties of these relaxations are investigated: the dependence of their character on the direction of the uniaxial compression, the change in concentration of current carriers during the relaxation processes, and the quenching of the relaxations by temperature, illumination, and high electric fields. It is found that the character of the relaxation process is different for compression directions [110] and $$[1\bar 10]$$ : in the first case the concentration of two-dimensional holes in the quantum well decreases in the course of the relaxation, while in the second case it increases. A model is proposed in which the cause of the relaxations of the piezoresistance and the anisotropic character of these relaxations is assumed to be the piezoelectric field, the value of which, according to estimates, is |E z| = 1.152 × 104 V/cm per kbar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1342893
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Reduction of tungsten and molybdenum oxides (1975)
    Springer
    Powder metallurgy and metal ceramics 14 (1975), S. 521-524 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. The more remote the process of hydrogen reduction of tungsten and molybdenum from equilibrium and the more unstable the intermediate phases, the greater is the self-acceleration of the reduction process resulting from particle comminution. 2. The hypothesis is advanced thatβ-W is a granulometric rather than a temperature modification of tungsten, which means that the existence ofβ-W directly depends on the particle size of the material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00810983
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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