Mössbauer studies of Sn4+/Nb5+ substituted Mn�?�Zn ferrites

[摘要] At room temperature, Mössbauer spectra of Sn⁴⁺/Nb⁵⁺ substituted Mnâ€�?�Zn ferrites have been taken to understand the site occupancy of substituted ions. The results indicate that both the substituted ions occupy tetrahedral (A) site only at lower concentration of substitution while at higher concentration they occupy both tetrahedral and octahedral sites. At higher concentration of Nb substitution a doublet has been observed besides sextets. The possibility of canting existence on octahedral sites has been discussed. The observed variations of the hyperfine fields, isomer shift, line widths and B/A peak area ratio with the ferrite composition are interpreted.

[学科分类] 材料工程

[关键词] Mnâ€�?�Zn ferrites;Mössbauer studies.