k-space mapping of majority and minority bands on the Fermi surface of Nickel below and above the Curie temperature.

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 TC . We find bands which move and bands which stay in place for going from T , TC to T . TC .