Distorted iron films on GaAs(001)-(4x6)
- 1. Department of Physics, Simon Fraser University, Burnaby, British Columbia, V5A 1S6 (Canada)
Description
Polarized K-edge x-ray absorption fine structure spectroscopy (XAFS) studies were performed both in and ex situ on iron films deposited on GaAs substrates. Samples with 5 and 10 ML (monolayers) of iron deposited on sulfur-passivated and (4x6)-reconstructed GaAs(001) surfaces, respectively, were studied ex situ (capped with 20 ML of gold) and compared with 9.3 ML on GaAs(001)-(4x6) measured in situ. Analysis of XAFS spectra for both samples on (4x6)-GaAs reveals a tetragonal distortion of the iron film relative to bulk body-centered-cubic iron. The distortion involves an in-plane contraction and an expansion perpendicular to the GaAs surface to give a c/a ratio of 1.03(1), with a comparable to half the bulk lattice constant of GaAs. The sample on sulfur-passivated GaAs did not exhibit this distortion
Additional details
Identifiers
- DOI
- 10.1103/PhysRevB.62.2151;
- PII
- S0163-1829(00)07127-7;
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter and Materials Physics
- Journal Volume
- 62
- Journal Issue
- 3
- Journal Page Range
- p. 2151-2157
- ISSN
- 1098-0121
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 35075812
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Descriptors DEI
- ABSORPTION SPECTROSCOPY; BCC LATTICES; FINE STRUCTURE; GALLIUM ARSENIDES; GOLD; IRON; PASSIVATION; SULFUR; SURFACES; THIN FILMS; X-RAY SPECTROSCOPY
- Descriptors DEC
- ARSENIC COMPOUNDS; ARSENIDES; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CUBIC LATTICES; ELEMENTS; FILMS; GALLIUM COMPOUNDS; METALS; NONMETALS; PNICTIDES; SPECTROSCOPY; TRANSITION ELEMENTS
Optional Information
- Notes
- (c) 2000 The American Physical Society