Effects of Core-Hole Screening on Spin-Polarised Auger Spectra from Ferromagnetic Ni

• Authors: T. Wegner , M. Potthoff , W. Nolting
• Languages of publication: EN

Abstracts

EN

We calculate the spin- and temperature-dependent local density of states for ferromagnetic Ni in the presence of a core hole at a distinguished site in the lattice. Correlations among the valence electrons and between valence and core electrons are described within a multi-band Hubbard model which is treated by means of second-order perturbation theory around the Hartree-Fock solution. The core-hole potential causes strong screening effects in the Ni valence band. The local magnetic moment is found to be decreased by a factor of 5-6. The consequences for the spin polarisation of CVV Auger electrons are discussed.

Keywords

EN

79.20.Fv; 71.20.Be; 75.60.Ej

Discipline

• 79.20.Fv: Electron impact: Auger emission(for Auger electron spectroscopy, see 82.80.Pv)
• 71.20.Be: Transition metals and alloys
• 75.60.Ej: Magnetization curves, hysteresis, Barkhausen and related effects(for hysteresis in ferroelectricity, see 77.80.Dj)

• Journal: Acta Physica Polonica A
• Year: 2000
• Volume: 97
• Issue: 3
• Pages: 567-570

Dates

published

2000-03

Contributors

author

T. Wegner

• Lehrstuhl "Festkörpertheorie", Institut für Physik, Humboldt-Universität zu Berlin, Invalidenstraße 110, 10115 Berlin, Germany

author

M. Potthoff

• Lehrstuhl "Festkörpertheorie", Institut für Physik, Humboldt-Universität zu Berlin, Invalidenstraße 110, 10115 Berlin, Germany

author

W. Nolting

• Lehrstuhl "Festkörpertheorie", Institut für Physik, Humboldt-Universität zu Berlin, Invalidenstraße 110, 10115 Berlin, Germany

Identifiers

DOI

10.12693/APhysPolA.97.567