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  • 75.50.Bb  (1)
  • 79.20.Nc  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Electronic quasiparticle structure of ferromagnetic bcc iron (1995)
    Springer
    The European physical journal 96 (1995), S. 357-372 
    Details
    ISSN: 1434-6036
    Keywords: 71.10.+x ; 71.27.+a ; 75.10.Lp ; 75.50.Bb
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We investigate the influence of electron correlations on the temperature-dependence of the electronic structure of ferromagnetic bcc iron by use of a manybody evaluation of a generalized model of magnetism. The single-particle part of the model-Hamiltonian is taken from an LDA band structure calculation. The manybody interactions are described by only two parameters, an intraband Coulomb interactionU and an interband exchangeJ. WithU=1.8 eV andJ=0.2 eV the self-consistent model solution yields aT=0 moment of about 2.04 µB and a Curie-temperature of 1044K. Details of the magnetic behaviour of Fe can be traced back to a striking temperature variation of the quasiparticle density of states. A novel explanation for the experimentally-observed non-collapsing exchange splitting is demonstrated in terms of the temperature-dependent spectral density for wave-vectors near the Γ-point. Typical differences in the magnetic behaviour of Fe and Ni are worked out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01313058
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  • 2
    Electronic Resource
    Electronic Resource
    The determination of shadowing critical angles in impact collision ion scattering spectroscopy (1988)
    Springer
    Applied physics 45 (1988), S. 63-67 
    Details
    ISSN: 1432-0630
    Keywords: 79.20.Nc ; 79.20.Rf
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Critical angles for shadowing in low-energy ion scattering spectroscopy are calculated in the momentum approximation for the Thomas-Fermi-Molière potential and the Ziegler-Biersack-Littmark potential. In the relevant parameter range the results can be fitted by a formula containing five constants depending on the potential only. For a fixed projectile-target combination at a given energy the distance dependence of the critical angle is described by a simple power law. The comparison of the calculated results with experimental data shows that the inclusion of the effect of thermal vibrations on the critical angles improves the agreement between calculations and experiment significantly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00618764
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    Paper (German National Licenses)
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