Spin dependent anisotropy in the momentum density of ferromagnetic nickel metal

Abstract

Directional spin dependent Compton profiles of ferromagnetic nickel metal have been measured with 55 keV circularly polarised synchrotron radiation and the results have been compared with an APW calculation of the electron momentum density. At low momenta where the negatively polarised 4s-p band reduces the spin dependent momentum density, the model predicts accurately the contribution to the (100) lineshape but significantly underestimates the (111) profile.

Three-dimensional momentum density of magnetic electrons in ferromagnetic iron

“…MCPs of iron, cobalt, nickel, and gadolinium were also reported by Mills [8] using an x-ray phase plate, which converts linearly polar-ized X rays into elliptically polarized ones. In addition to these results, many directional MCPs [7,9,10] have been measured using circularly polarized SR. However, no attempt has been made to reconstruct Pmag(p) because of insufficient statistical accuracy and limited crystalline directions of these MCPs.…”

Compton study ofNi75Cu25andBansil1, Kaprzyk2, Andrejczuk3 et al. 1998Phys. Rev. B21370View full textAdd to dashboardCite

“…[19][20][21]23,[26][27][28][29]54 We also considered the ͓100͔ and ͓111͔ magnetic CP's of Ref. 29 measured at a relatively low-momentum resolution of 0.7 a.u.…”

“…[19][20][21][22][23][24][25][26][27][28][29] CP's of Cu x Ni 1Ϫx disordered alloys for mainly Cu-rich polycrystalline samples are reported in Ref. 15.…”

Photon scattering by magnetic solids

“…Experiments on ferromagnetic iron and nickel, using polarized photons from an electron synchrotron source, have been reported by Cooper et al (1988) and Timms et al ( 1990). Directional spin-weighted momentum profiles show features that do not appear in calculations based on the augmented plane wave method for the electronic structure or metals (Callaway t 991 ).…”