Iron-doped gallium borate crystals: Synthesis and ESR study of local disorder

Abstract

High quality Fe_xGa_1-xBO₃ single crystals with 0 ≤ x ≤ 1 were synthesized and studied by electron magnetic resonance in the temperature range from 4 to 290 K. At low x, only the electron spin resonance (ESR) of diluted Fe³⁺ ions is present. Fitting to the experimental ESR spectra, assuming distributions of Fe³⁺ ligand coordinates, has shown the existence of local disorder in the crystals.