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  • 1990-1994  (2)
  • 1980-1984
  • 1993  (2)
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  • 1990-1994  (2)
  • 1980-1984
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  • 1
    Electronic Resource
    Electronic Resource
    Nitrogen doping in AlGaP grown by metalorganic vapor phase epitaxy using ammonia (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 663-665 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Doping characteristics of nitrogen in AlGaP grown by metalorganic vapor phase epitaxy have been investigated using ammonia as the nitrogen source. It was found that nitrogen could be successfully incorporated into AlGaP up to as much as 1×1020/cm3 assisted by the gas phase parasitic reaction between trimethylaluminum and ammonia, while nitrogen incorporation into GaP was difficult. Nitrogen incorporation was found to be dependent on several factors such as ammonia concentration, Al composition, V/III ratio, and growth temperature. Exciton recombination bound to isoelectronic nitrogen in AlGaP was observed for the first time by photoluminescence measurement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.109950
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Macroscopic behavior and discrete dynamo in high-aitch-theta reversed-field pinch discharges (1993)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 5 (1993), S. 1836-1841 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetohydrodynamic (MHD) activity and the discrete dynamo in high-aitch-theta reversed-field pinch (RFP) discharges are studied through comparisons with those in normal-aitch-theta RFP discharges, where aitch-theta=Bθ(a)/〈Bz〉 is the pinch parameter. In high-aitch-theta RFP discharges, the mode coupling of m=1 is enhanced by the high magnetic shear configuration, and the MHD activity is more turbulent as compared with that in normal-aitch-theta RFP discharges. Furthermore, the discrete increase of the toroidal magnetic flux is obviously observable. The increase of the toroidal magnetic flux generated by the discrete dynamo, which has an asymmetric structure in the toroidal direction, is only 1%–2% of the whole toroidal magnetic flux. The experimental results indicate that the discrete dynamo does not play an essential role in the RFP dynamo.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860820
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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