Electronic structure and magnetism of Nd/sub 2/Fe/sub 14/B and related compounds

The electronic and magnetic structures of ${\mathrm{Nd}}_{2}$${\mathrm{Fe}}_{14}$B and related compounds have been studied with photoemission spectroscopy and self-consistent spin-polarized electronic structure calculations. The positions of the exchange-split $\mathrm{Fe}3d$ bands and the localized $4f$ levels were determined. The densities of states in the ferromagnetic and paramagnetic states are essentially identical which provides strong evidence for considerable magnetic short-range order above ${T}_{c}$, as in the fluctuating-band model of itinerant-electron magnetism.