Abstract
In this study, bimetallic (Cu–Mn) substituted SrFe
12
O
19
hexaferrites [Sr
1−2x
Mn
x
Cu
x
Fe
12
O
19
(0.0 ≤ x ≤ 0.1)] were synthesized via sol–gel auto-combustion approach. The effect of bimetallic substitution on structure, morphology and magnetism of SrFe
12
O
19
was investigated. SEM images divulge the nano-size of the prepared products with speck morphology. X-ray powder diffraction analysis affirmed their complete conversion to SrFe
12
O
19
hexagonal crystal phase. The results from
57
Fe Mössbauer suggested that all five important sextets of Sr
1−2x
Mn
x
Cu
x
Fe
12
O
19
hexaferrites effected due to the substitution of Cu and Mn ions. Cation distribution calculation showed that as the percentage of Mn and Cu increased in Sr
1−2x
Mn
x
Cu
x
Fe
12
O
19
(0.0 ≤ x ≤ 0.1), particularly for x = 0.03 the relative area of 12k and 4f
2
site increased. This indicates that Fe ions are migrated towards 12k and 4f
2
octahedral site.