Optical spectra of ceramic BII-XGDXFEO3,BII-XNDXFEO3,BII-X-YGDX LAYFEO3

Abstract

The crystal structure and some optical properties of slightly substituted solid solutions of Bi1-xGdxFeO3, Bi1-xNdxFeO3 and Bi1-x-yGdxLayFeO3 as ceramic compound samples at X < 0.2 and X + y < 0.2 have been estimated by means of X-ray diffraction and reflection spectroscopy in visible region of spectrum. Mentioned Bi1-xGdxFeO3, Bi1-xNdxFeO3 compounds show at room temperature the dominant crystal structure with space group of R3c type at concentration of the doping element x < 0.1 and also detect the presence of the optical absorption due to electronic transitions with wave length of the order of 0.4-0.5 gk, 0.6 gk, 0.8 gk and 1.1 gk due to the transitions of the three-charge iron ions, positioned in the distorted oxygen octahedra