d-Orbital directed X-ray photoemission from some transition-metal fluoride single crystals and associated Xα calculations. MnF2 and KMnF3

Abstract

Angle-resolved photoemission energy distributions (PED) have been obtained from the valence bands of manganese(II) fluoride (MnF₂) and potassium manganese(II) fluoride (KMnF₃) single crystals using Mg Kα radiation. Pronounced variation in the PED was observed as the electron take-off angle was varied relative to the crystalline axes, KMnF₃ showing similar though more pronounced results. The intensity variation is well explained by the matrix-element model, and the t_2g–e_g separations are in reasonable agreement with an SCF Xα calculation on the cluster MnF^4–₆.