Abstract
Magnetic or spin-dependent extended x-ray-absorption fine-structure (EXAFS) studies have been performed at the (Formula presented) edges of pure Co and Ni and at the (Formula presented) edges of Gd metal. Using a two-step model for the absorption process and introducing an additive-exchange contribution to the complex Coulomb scattering amplitude and the electron mean free path, an ansatz for the description of the magnetic EXAFS is derived. A parametrization of these quantities is proposed for an extraction of the spin-dependent values from the experimental data. The results for the elastic exchange scattering cross section in the energy range of 100-600 eV are in excellent agreement with theoretical predictions from a Born-Ockhur approximation. The inelastic exchange scattering effects are found to be negligible.
| Original language | English |
|---|---|
| Pages (from-to) | 3466-3473 |
| Number of pages | 8 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 57 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1998 |
| Externally published | Yes |