Photoemission study of Fermi surfaces of pseudomorphic Co, Ni, and Co{sub x}Ni{sub 1-x} films on Cu(100)
- LBNL Library
The k-space electronic structure of Co x Ni 12x alloy films epitaxially grown on Cu{approximately}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 pseudo-morphic 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.
- Research Organization:
- Lawrence Berkeley National Lab., CA (US)
- Sponsoring Organization:
- USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 771870
- Report Number(s):
- LBNL--46089
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 24 Vol. 60
- Country of Publication:
- United States
- Language:
- English
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