Fermi surface study of pseudomorphic Fe1-xNix and Co1-xNix thin films on Cu(100)
- LBNL Library
We report angle resolved photoemission studies of the electronic behavior of ultrathin epitaxial layers of fcc structured binary alloys, Fe1-xNix and Co1-xNix, deposited by molecular beam epitaxy on Cu(100) substrates. In particular, we have used Fermi surface mapping to monitor changes in the Fermi surface with increasing magnetization density. Fe1-xNix and Co1-xNix binary alloys show a different behavior in the bulk. Co1-xNix is structurally and magnetically well-behaved. In particular, the magnetic moment varies linearly as a function of concentration. This is in sharp contrast to fcc Fe1-xNix which displays a magnetic instability at approx. 65% Fe content. An extended regime of fcc stability is possible via epitaxy on Cu(100). The changes in the Fermi surfaces of Fe1-xNix and Co1-xNix pseudomorphic film alloys depending on various concentrations of Ni have been investigated in a large photon energy regime. We address the following question: To what degree is the Fermi surface sharply preserved in substitutional alloys?
- 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:
- 771866
- Report Number(s):
- LBNL--46085
- Journal Information:
- Journal of Vacuum Science and Technology A, Journal Name: Journal of Vacuum Science and Technology A Journal Issue: 4 Vol. 17
- Country of Publication:
- United States
- Language:
- English
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