Abstract
In this research, we report on the cation distribution and site occupancy of Cu 2 + and Er 3 + ions in the hexagonal lattice of M-type strontium hexagonal ferrites with chemical composition Sr 1-x Cu x Fe 12-y Er y O 19 (x = 0.0, 0.1, 0.2, and y = 0.0, 0.4, 0.5) fabricated using sol-gel autocombustion technique. Raman analysis of the synthesized samples was conducted based on the group theory analysis of hexagonal ferrites based on the D 6h symmetry. The Raman active modes based on the mode assignment and symmetry and were typical of M-type hexaferrite. Mossbauer spectroscopy shows the density of the s electron cloud at the 12k, 4f 2 , and 4f 1 is affected by Cu 2 + -Er 3 + substitution which indicate that all the five sexets originate from Fe 3 + ion with high spin and that Er 3 + ion (with d 10 orbitals) occupies Fe 3 + ion position at 12k, 4f 2 , 2a, and 2b sites in different proportion based on the Ligand theory. (c) 2022 Elsevier B.V. All rights reserved.