Calculation of the optical spectra of β’-NiAl and CoAl
- 15 January 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 43 (3) , 1948-1953
- https://doi.org/10.1103/physrevb.43.1948
Abstract
Band structures of β’-NiAl and CoAl have been calculated to interpret the experimental optical spectra. The optical transitions of both compounds are calculated as direct interband transitions including electric-dipole matrix elements between the eigenstates of the ground state of the system. All of the structures found in the optical spectra of both compounds involve states with some Ni or Co d character in both the initial and the final states. The overall agreement is good between the calculated spectrum and the optical data for β’-NiAl. For β’-CoAl there is qualitative agreement but some discrepancy for the energy positions and the intensities of the structures. A self-energy correction for the excitation spectrum has been used for β’-CoAl to improve the agreement.Keywords
This publication has 23 references indexed in Scilit:
- Optical properties of-CoAlPhysical Review B, 1982
- The density-of-states functions of the ordered alloys FeAl, CoAl and NiAl and their relation to experimental data; calculations of the imaginary part of the complex dielectric functionJournal of Physics F: Metal Physics, 1980
- Optical properties and electronic structure ofPhysical Review B, 1980
- Band structure and X‐ray investigation of transition metal aluminidesPhysica Status Solidi (b), 1979
- X‐Ray Spectra and Electronic Structure of Some CsCl‐Type Transition Metal‐Aluminium AlloysPhysica Status Solidi (b), 1979
- Band narrowing and charge transfer in six intermetallic compoundsPhysical Review B, 1974
- Optical Properties of β′ Phase CoAl, CoGa, and NiGaJournal of Applied Physics, 1970
- Optical Constants of β-Phase NiAlJournal of Applied Physics, 1967
- The Reflectance of the Intermetallic Compounds NiAl and CoAlJournal of the Physics Society Japan, 1966
- Spectral Reflectance of CoAl and NiAl Alloys with CsCl StructureJournal of the Physics Society Japan, 1966