Three-dimensional momentum density of magnetic electrons in ferromagnetic iron

Abstract

Experimental and theoretical three-dimensional momentum densities of magnetic electrons in ferromagnetic iron are reported for the first time and are found to be in good qualitative agreement. The experimental momentum density is reconstructed from fourteen one-dimensional magnetic Compton profiles, and the theoretical one is calculated by the full-potential linearized augmented-plane-wave method. The experiment indicates that the theory slightly underestimates the negative spin polarization of the .v,/7-like electrons in the first Brillouin zone and slightly overestimates umklapp processes.

Reconstructed three-dimensional electron momentum density in lithium: A Compton scattering study

“…20 Later, the method was applied to reconstruct the 3D spin-dependent momentum density ͑i.e., the difference between the majority and minority spin densities͒ from magnetic CP's of Fe by Tanaka et al 21,22 In these studies, no corresponding error map was given because a method to analyze the error propagation was not yet developed at the time. 23 Recently, Cormack's method was developed further by Kontrym-Sznajd et al, 24 and applied by Dugdale et al 25 to the reconstruction of the 2D electron momentum density of Cr from several directional CP's.…”

Transform Methods of Computerized Tomography in Studying Electronic Structure and Fermi Surfaces of Solids

“…[57]. However, because calculations of the Bessel functions of a higher order make some difficulties, lately the direct FT (instead of F-B) algorithm [58] has been used both to 2D ACAR [59][60][61][62][63] as well as to 1D Compton profiles reconstructing either fully 3D densities [64][65][66][67][68][69] or 2D ones [70][71][72][73]. Such techniques involving both fast FT algorithm as well as different ways of interpolations were elaborated by many authors, see e.g.…”

Magnetic Compton Scattering and Measurements of Momentum Distribution of Magnetic Electrons

“…An experimental trial has been carried out on ferromagnetic Fe (Tanaka, Sakai, Kubo & Kawata, 1993). 14 directional MCPs, shown in The most important evidence is that the crater is in the first Brillouin zone.…”