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AM: Magnetismus

AM 9: Poster: Magnetowid. (1-17), Dü. Schichten (18-34), Oberfl
ächenmag. (35,36), Mikr. Methoden (37-45), Mikromag. (46-58), Phasenüberg. (59-77), Spektroskop. (78-91), Nanokr.Mat.(92-96), Anisotrop. (97-101), Schmelzen(102-104),Sonst/postdeadl.(105-109)

AM 9.79: Poster

Dienstag, 27. März 2001, 14:45–19:00, Foyer S 3

A relativistic description for the magnetic Compton scattering of solids — •Diana Benea and Hubert Ebert — Physik. Chemie, Universität München,Butenandtstr. 5-13,81377 München

A fully relativistic formulation for the spin resolved momentum density is presented together with a corresponding scheme to determine the magnetic Compton profiles for magnetic solids. This formalism is set up within the framework of spin-polarised relativistic Korringa-Kohn-Rostoker (SPR-KKR) method of bandstructure calculations. The development can be seen as a first step towards a fully relativistic treatment of magnetic Compton scattering. The results for computed directional magnetic profiles of Fe and Ni, where the relativistic effects are small, are presented and compared with nonrelativistic calculation of other authors and experimental data. The effects of disorder on the momentum density are studied and the corresponding computed Compton profiles for ordered and disordered Fe–Pt alloys are presented. Also the influence of the orientation of the magnetisation is evidenced by calculations of the Compton magnetic profiles for different magnetization orientations.