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  • 1
    Electronic Resource
    Electronic Resource
    Magnetic and transport properties of PrBa2Cu4O8-δ prepared at 1 atm oxygen pressure (1996)
    Springer
    Journal of low temperature physics 105 (1996), S. 1463-1468 
    Details
    ISSN: 1573-7357
    Keywords: 74.10,+v ; 74.25.Bt, Ha ; 74.72.−h ; 74.72.Jt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Measurements of physical properties were performed on the PrBa2Cu4O8-δ sample prepared by the sol-gel method and sintered in I atm oxygen pressure. Instead of exhibiting superconductivity as for R Y or Gd in the RBa2Cu4O8-δ compound. This compound is unstable, insulating but metallic-like at low temperatures. No superconductivity was observed down to 2 K. Since PrBa2Cu4O8-δ can be re-written as Cu2Ba2PrCu2O8-δ which is a compound of two CuO2-layers and two CuO-chains, the possibility of anomalous Pr antiferromagnetic ordering around 18 K observed from preliminary magnetic data and the effect of oxygen stoichiotmetry parameter δ on the metal-insulator transition are explored.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00753906
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    Paper (German National Licenses)
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  • 2
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    Clean fuels from biomass (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The feasibility of converting biomass to portable fuels is studied. Since plants synthesize biomass from H2O and CO2 with the help of solar energy, the conversion methods of pyrolysis, anaerobic fermentation, and hydrogenation are considered. Cost reduction methods and cost effectiveness are emphasized.
    Keywords: AUXILIARY SYSTEMS
    Type: NASA-TM-X-71538 , E-7945 , Southeastern Seminar on Thermal Sci.; Apr 11, 1974 - Apr 12, 1974; New Orleans
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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