Magnetic properties and spin-dependent scattering in ferromagnets

J. Berakdar, P. Bruno

In this project we explore theoretically the possibility to employ the multi-electron emission from ferromagnets for the investigation of magnetic properties and spin dependent electronic scattering in the sample.
It has been shown by a recent experiment in our institute that the spectrum of an electron pair emitted from a ferromagnet upon the impact of a polarized electron or a linearly polarized photon is dependent on the magnetization of the sample. We explore the question whether it is possible to deduce some information from the electron-pair spectrum that can be uniquely linked to the magnetization of the sample.
Our preliminary calculations indicate that the geometry under which the pair is detected is decisive as to which information are accessible. E.g., by careful choice of the geometry it is possible, at least theoretically, to map out the spectral function of the sample. The methods used here are a hybrid of first principle calculations for the spectral functions and model calculations of the spin dependent electronic scattering in the sample.
 

Collaborations
S. Samarin, J. Kirschner (MPI, Halle)