<i>k</i>-Space Mapping of Majority and Minority Bands on the Fermi Surface of Nickel below and above the Curie Temperature

Abstract

A section through the three-dimensional Fermi surface of Ni has been mapped perpendicular to the [110] direction using angle-scanned photoemission. Regions of minority and majority spin bands, well separated in k space, can clearly be identified through comparison with a band structure calculation. The behavior of the different bands is observed for temperatures below and above the Curie temperature ${T}_{C}$. We find bands which move and bands which stay in place for going from $T&lt;{T}_{C}$ to $T&gt;{T}_{C}$.