Abstract
The refractive index of the Europium-Chalcogenides has been measured as a function of wavelength, temperature and magnetic field and compared with dispersion theory. The refractive index increases from EuO to EuTe and with decreasing temperature. Attributing different oscillator strengths to the various substances, classical dispersion theory can account for the observed changes in the refractive index. The optical and static dielectric constant, the Reststrahlen wavelength and the compressibility have been computed.
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