INFRARED LATTICE VIBRATIONS OF MAGNESIUM STANNIDE.
Abstract
The room-temperature infrared reflection spectrum of semiconducting Mg2Sn with carrier concentration of 3 X 10 to the 17th power 1/cc has been measured between the wavelengths of 5 and 100 microns. By classical oscillator theory, the reflectivity of the fundamental lattice vibration region has been analyzed, and the following obtained: frequencies, strengths, and linewidths of the infrared active modes; high and low frequency dielectric constant values; and the refractive index n and extinction coefficient k as a function of wavelength. In order to fit the experimental results, it is necessary to assume two sets of dispersion parameters with the strong transverse optical (TO) resonance at 53.75 microns (186 1/cm) and a weak one at 48.25 microns (207 1/cm). (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1965
- Accession Number
- AD0620623
Entities
People
- A. Kahan
- E. V. Loewenstein
- H. G. Lipson
Organizations
- Air Force Cambridge Research Laboratories