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  • 33.20.Rm  (2)
  • 73.20-r  (1)
  • PACS: 75.70Ak; 75.30Gw; 73.20  (1)
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Materialart
Erscheinungszeitraum
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    High resolution photoabsorption spectroscopy at the carbonK-Edge (1989)
    Springer
    Applied physics 49 (1989), S. 393-397 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 07.85.+n ; 33.20.Rm ; 35.20.Pa
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Using plane grating, ellipsoidal mirror, grazing incidence monochromators at the storage ring BESSY, a resolution of ≦ 150meV was achieved for a photon energy of 285 eV. This high energy resolution considerably extends the range of possible studies using core level Spectroscopy. Some of the new opportunities are illustrated at the CK edge by resolving the vibrational fine structure of condensed C2H4 multilayers in the (1s−1, π*) state by means of photoabsorption spectroscopy. For the sake of comparison with other high resolution instruments, the vibrational fine structure of condensed N2 multilayers at the NK edge (∼ 400eV) was also measured, yielding a resolving power of 3000.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00615022
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    The magnetism of nickel monolayers (1996)
    Springer
    Applied physics 62 (1996), S. 417-427 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 75.70Ak ; 75.30Gw ; 73.20-r
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Nickel allows to study the largest variety of phenomena in the magnetism of UHV ultrathin films. The low critical temperature of ≈ 630 K for the bulk favors experiments from 0 K to aboveT c and from one monolayer to infinite thick films. The thickness dependence ofT c (d) for the (001) and the (111) orientation is compared. Susceptibility measurements in UHV are presented, and from χmax the film geometry can be deduced. Ferromagnetic resonance measures the second- and fourth-order anisotropy constants. These give a clear understanding of when and how the reorientation transition from the in-plane to the perpendicular orientation occurs and its nature. Magnetic resonance and circular X-ray dichroism measure the spin and orbital parts of the magnetic moment µ, its anisotropy Δµ, and the 3d and 4sp contributions. Finally, we show how a 4 Monolayer (ML) Ni(001) film can be transformed into NiO by controlled oxygen dosage and thermal treatment.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01567112
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    The magnetism of nickel monolayers (1996)
    Springer
    Applied physics 62 (1996), S. 417-427 
    Details
    ISSN: 1432-0630
    Schlagwort(e): PACS: 75.70Ak; 75.30Gw; 73.20 ; r
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract.  Nickel allows to study the largest variety of phenomena in the magnetism of UHV ultrathin films. The low critical temperature of ≈630 K for the bulk favors experiments from 0 K to above T c and from one monolayer to infinite thick films. The thickness dependence of T c (d) for the (001) and the (111) orientation is compared. Susceptibility measurements in UHV are presented, and from χmax the film geometry can be deduced. Ferromagnetic resonance measures the second- and fourth-order anisotropy constants. These give a clear understanding of when and how the reorientation transition from the in-plane to the perpendicular orientation occurs and its nature. Magnetic resonance and circular X-ray dichroism measure the spin and orbital parts of the magnetic moment μ, its anisotropy Δμ, and the 3d and 4sp contributions. Finally, we show how a 4 Monolayer (ML) Ni (001) film can be transformed into NiO by controlled oxygen dosage and thermal treatment.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s003390050318
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Intramolecular resonances afterK-shell excitation of C2H2n adsorbed on Ag and Cu(100) surfaces (1989)
    Springer
    The European physical journal 11 (1989), S. 219-229 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 33.20.Rm ; 33.70.Tg ; 35.20.Dp
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The near edge X-ray absorption fine structure (NEXAFS) at the C K-edge of C2H2, C2H4, C2H6 on Cu(100) and Ag(100) surfaces is studied. The oriented character of the molecules on the surface combined to the dipole selection rules for photon absorption allows an experimental assignment of the nature of the various final states. A careful fitting of the NEXAFS spectra reveals final states of C–H character and shake-up satellites of the C(1 s) to π* (C–C) transition. The asymmetric line shape of the C(1 s) to σ* (C–C) transition is described in a scattering model of the photoelectron from the molecular potential.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01438008
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