Charge transfer in intermetallics: HfPt sub 3

Journal Article · Fri Sep 15 04:00:00 EDT 1989 · Physical Review (Section) B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.5319· OSTI ID:5651408

Wertheim, G K; Buchanan, D N.E. ^[1]; Wernick, J H ^[2]

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1. AT T Bell Laboratories, Murray Hill, New Jersey 07974 (US)
2. Bell Communications Research, Red Bank, New Jersey 07701

The charge transfer in HfPt{sub 3} is discussed on the basis of the 4{ital f} core-electron binding-energy shifts of the constituent elements. Based on binding energies measured relative to the Fermi levels, both Hf and Pt have positive shifts in the compound. According to a Born-Haber cycle analysis these shifts are directly attributable to the large enthalpy of formation of HfPt{sub 3}. Corrections for the differences in reference level and final-state screening between the element and the compound make the shift of the Hf larger and that of the Pt smaller, and presumably negative, indicating a net flow of electronic charge from Hf to Pt. This is in accord with expectations based on the electronegativity difference and with the semiempirical model of Miedema {ital et} {ital al}., but counter to the direction of charge flow in the Engel-Brewer analysis of bonding.

• OSTI ID: 5651408
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Journal Name: Physical Review (Section) B: Condensed Matter; (USA) Vol. 40:8; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
AUGER ELECTRON SPECTROSCOPY
BINDING ENERGY
BREMSSTRAHLUNG
CHARGE TRANSPORT
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONEGATIVITY
ELECTRONIC STRUCTURE
ENERGY
ENERGY LEVELS
F STATES
HAFNIUM ALLOYS
HCP LATTICES
HEXAGONAL LATTICES
INTERMETALLIC COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PLATINUM ALLOYS
PLATINUM METAL ALLOYS
POLYCRYSTALS
RADIATIONS
SCREENING
SPECTROSCOPY
SYNCHROTRON RADIATION