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  • 1
    Digitale Medien
    Digitale Medien
    Thermally induced structural modification in Pt/C X-ray multilayer mirrors fabricated by electron beam evaporation (1996)
    Springer
    Applied physics 62 (1996), S. 29-32 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 68.35.Fx ; 68.60.Dv ; 68.65. + g
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Platinum-carbon multilayer mirrors with a bilayer spacing of 50 Å were fabricated in an ultrahigh vacuum electron beam evaporator. The thermal stability of these multilayers was studied under vacuum annealing using X-ray reflectivity and X-ray diffraction. Up to 450°C, the bilayer spacing increases monotonically accompanied by a gradual increase in crystallite size and grain texture. At 500°C multilayer reflection vanishes, platinum crystallites grow abruptly, and there is a strong texture of platinum in the [220] -plane. Possible reasons for thermally induced structural modifications in these multilayers are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01568083
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Steady state shapes of periodic profiles on (110), (100), and (111) surfaces of nickel (1981)
    Springer
    Applied physics 25 (1981), S. 231-238 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 66.30 ; 68.20
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Periodic surface profiles with amplitudes of ≦0.4 μm and periodicities of 4–20 μm were prepared on Ni(110), (100), and (111) single crystal surfaces. These crystals were annealed in ultra-high vacuum (UHV) at 1073–1327 K after they had been cleaned by Ar ion bombardment and investigated by Auger electron spectroscopy. The geometry of the profiles was studied in UHV by laser diffraction and outside the vacuum by interference microscopy. The profiles have sinusoidal shapes on Ni(110) but trapezoidal shapes on both the (100) and (111) surfaces. This type of faceting can be understood on the basis of the anisotropic surface energy of Ni, with cusps at the (100) and (111) orientations. Model calculations show in the case of anisotropic surface energy that periodic profiles develop facets which correspond to the low surface energy orientations (close-packed surfaces).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00902976
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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