Electronic structure of NiAl
- Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (USA)
- Department of Physics, Brookhaven National Laboratory, Upton, NY (USA)
- Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, PA (USA)
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN (USA)
The valence-band structure of nickel aluminum was measured by use of angle-resolved photoemission with synchrotron radiation and calculated using the local-density approximation. The overall agreement between theory and experiment is remarkably good---much better than for pure nickel. This means that the self-energy'' corrections are significantly less in NiAl than in pure nickel. The core-level binding energies in NiAl are compared experimentally and theoretically with the equivalent levels in Ni and Al. Surprisingly, the Ni core shifts to higher binding energy and the Al to lower as if charge were transferred from Ni to Al---opposite to the direction predicted from electronegativity. These observations are discussed in terms of bonding in NiAl.
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6713452
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:3; ISSN 0163-1829; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ALUMINIUM ALLOYS
BAND THEORY
BINDING ENERGY
BREMSSTRAHLUNG
CHEMICAL BONDS
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
EMISSION
ENERGY
INTERMETALLIC COMPOUNDS
NICKEL ALLOYS
PHOTOEMISSION
RADIATIONS
SECONDARY EMISSION
SPECTROSCOPY
SYNCHROTRON RADIATION