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  • 1
    Electronic Resource
    Electronic Resource
    Amorphous-to-crystalline transformations in bismuth-oxide-based high Tc superconductors (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 805-807 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The transformation of high-resistivity amorphous Bi1.5 SrCaCu2 Ox to superconductive material has been characterized by structural, thermochemical, transport, and magnetic measurements. X-ray powder diffraction confirmed that rapid solidification of Bi-Sr-Ca-Cu-O melts yields amorphous materials. Differential scanning calorimetry indicated an exothermic crystallization peak at ∼455 °C with a corresponding enthalpy of ∼50 J/g. Thermal cycling of the insulating glass to a temperature above that required for crystallization results in a transformation from an insulating to a partially superconducting material with an onset temperature of 85 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.100145
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal conductivity of optical coatings (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 3882-3885 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A model capable of explaining recent experimental results showing a considerable decrease in the thermal diffusivity of optical coatings is presented. The model assumes that the coatings contain microcracks. It predicts that such imperfections can cause reduction factors of 2 or more orders of magnitude in the thermal conductivity of the films, when compared to the corresponding bulk values. If the cracks enclose a region where light is absorbed the thermal isolation can lead to damage of the coating. A similar model consisting of a random distribution of voids only predicts a modest reduction of the net thermal conductivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337560
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Microstructure and growth mechanism of thin sputtered films of YBa2Cu3O7 on MgO substrates (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 59 (1991), S. 3177-3179 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The microstructures of very thin sputtered films of YBa2Cu3O7 deposited on (100) faces of single-crystal MgO, have been investigated using scanning tunneling and atomic force microscopies. By a thickness of 10 nm, the substrate is completely covered by a fine-grained layer of the superconductor. The average grain size is about 100 nm. Many of these grains show evidence of a spiral growth mechanism. In somewhat thicker films (20 nm), the grain size has increased considerably (to about 200 nm), and this trend continues as the thickness is increased. The small grain size close to the interface suggests a possible origin for widely observed ion-beam dechanneling in this region of the film.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.105776
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Nucleon-nucleus Interactions (1965)
    [s.l.] : Nature Publishing Group
    Nature 206 (1965), S. 284-286 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In such situations, it is reasonable to resort to pheno-menological models which assimilate large amounts of empirical data and may also predict new information. The 'optical model'13 falls into this class: it represents the nucleon-nucleus interaction by a complex potential, including a spin-orbit ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/206284a0
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    Paper (German National Licenses)
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