Exploiting Compton scattering: Studies of spin density distributions

Cooper, Malcolm J.
February 2000
AIP Conference Proceedings;2000, Vol. 506 Issue 1, p18
Academic Journal
Studies of electron density distributions through the Compton effect exploit the Doppler shift that occurs because the target electron, bound in a potential, must be moving. This phenomenon was first exploited by DuMond and co-workers within a decade of Compton’s discovery, then largely forgotten for thirty years. After a patchy renaissance it has acquired a new potency with the availability of synchrotron radiation. In particular the ability to produce high fluxes of circularly polarized x-rays has led to studies of the spin density in ferromagnets. Magnetic Compton scattering experiments provide the only direct probe of the bulk ground state spin density distribution in ferro/ferri-magnetic materials. They are often sufficiently characteristic of the element that site-specific contributions can be extracted and conduction electron polarization studied; such work is the focus of this paper. © 2000 American Institute of Physics.


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