Electronic structure of hexagonal ferromagnetic cobalt and its change under pressure

Self-consistent computations of the band structure of hexagonal-close-packed (hcp) ferromagnetic cobalt under normal conditions and a pressure of 290 kbar are performed. The linearized Korringa-Kohn-Rostoker method (model Hamiltonian) is used for the computation. Results of the computation are compared with recent experimental investigations of the band structure by the method of photoelectron spectroscopy. A new model is presented for the Fermi surface of this metal, which permits incontrovertible description of both the angular dependences of the frequency spectrum of the de Haas–van Alphen effect, and their change under pressure.