抄録
EPR measurements for the substitutional Fe3+ ions in layered perovskite-type Rb2CdF4 crystals have been made at room temperatures using a X-band spectrometer. A tetragonal spectrum is ascribed to an uncompensated Fe3+ centre. An orthorhombic spectrum is analysed by separating the fine structure terms into uniaxial terms and a cubic one. Obtained uniaxial parameters are well compared to those for the other tetragonal Fe3+ centres. By the analysis, the orthorhombic centre is ascribed to a Fe3+ ion associated with a nearest-Cd2+ vacancy. The fine structure parameters are analysed further by the Newman’s superposition model to obtain metal-ligand distances. Results are discussed together with those for the Cr3+ and Gd3+ centres in A2MF4 crystals.
