Relativistic theory of magnetic scattering of x rays: Application to ferromagnetic iron

Arola, E. and Strange, Paul and Gyorffy, Balazs L. (1997) Relativistic theory of magnetic scattering of x rays: Application to ferromagnetic iron. Physical Review B: Condensed Matter and Materials Physics, 55 (1). pp. 472-484. ISSN 0163-1829. (doi:https://doi.org/10.1103/PhysRevB.55.472) (Full text available)

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Abstract

We present a detailed description of a first-principles formalism for magnetic scattering of circularly polar- ized x rays from solids in the framework of the fully relativistic spin-polarized multiple-scattering theory. The scattering amplitudes are calculated using a standard time-dependent perturbation theory to second order in the electron-photon interaction vertex. Particular attention is paid to understanding the relative importance of the positive- and negative-energy solutions of the Dirac equation to the scattering amplitude. The advantage of the present theory as compared with other recent works on magnetic x-ray scattering is that, being fully relativistic, spin-orbit coupling and spin-polarization effects are treated on an equal footing. Second, the electron Green’s function expressed in terms of the path operators in the multiple-scattering theory allows us to include the contribution of the crystalline environment to the scattering amplitude. To illustrate the use of the method we have done calculations on the anomalous magnetic scattering at the K , L_II , and L_III absorption edges of ferromagnetic iron.

Item Type: Article
Subjects: Q Science > QC Physics > QC176 Solid state physics
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Paul Strange
Date Deposited: 06 Aug 2015 09:19 UTC
Last Modified: 17 Jan 2017 13:03 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50036 (The current URI for this page, for reference purposes)
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