OPTICAL-CONSTANTS OF VARIOUS CHROMITES AS DETERMINED BY KRAMERS-KRONIG ANALYSIS

The infrared optical constants of a few different powders of chromites , XCr(2)O(4) (where X is Fe, Ni, Mg, Zn, or Cu), have been determined by Kramers-Kronig analysis of their infrared transmission and reflecti on spectra. The knowledge of these constants allows one to predict the different thin-layer infrared reflection spectra and to compare them, when it is possible, with the reflection spectra calculated with n an d k obtained by the use of the classical oscillator method. (C) 1996 O ptical Society of America