Photoemission study of Fermi surfaces of pseudomorphic Co, Ni, and Co{sub x}Ni{sub 1-x} films on Cu(100)
- Physics Department, Pennsylvania State University, 104 Davey Laboratory, University Park, Pennsylvania 16802 (United States)
- Lawrence Livermore National Laboratory, Livermore, 7000 East Avenue, Livermore, California 94550 (United States)
- Lawrence Berkeley National Laboratory, Advanced Light Source, 1 Cyclotron Road, Berkeley, California 94720 (United States)
The k-space electronic structure of Co{sub x}Ni{sub 1-x} alloy films epitaxially grown on Cu(100) has been investigated with changing stoichiometry in angle-resolved photoemission, and is compared to the electronic structure of fcc films of Co and Ni, and single-crystalline Cu. We have monitored changes in the Fermi surface with changing stoichiometry and changing magnetic behavior. The measurements show that the sp band is a prominent feature of the Fermi surface throughout k space for all of the alloys and the magnetic 3d pseudomorphic fcc films. A band-structure calculation of Ni allows us to identify d-hole pockets which increase in size with changing stoichiometry. Minority spin states highlight specific regions of k space associated with key spanning vectors that determine the oscillatory exchange coupling, which underpins the giant magnetoresistance effect in heterostructures. (c) 1999 The American Physical Society.
- OSTI ID:
- 20217831
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 60, Issue 24; Other Information: PBD: 15 Dec 1999; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fermi surface study of pseudomorphic Fe{sub 1{minus}x}Ni{sub x} and Co{sub 1{minus}x}Ni{sub x} thin films on Cu(100)
Electronic properties of pseudomorphic metallic films: Photoemission and inverse photoemission measurements