The role of cations distribution on magnetic and reflection loss properties of ferrimagnetic [formula omitted]

Abstract

The site preference and magnetic properties of Zn–Sn substituted strontium ferrite [formula omitted] particles with [formula omitted] were studied using both [formula omitted] and [formula omitted] Mössbauer spectroscopies and magnetic measurements. The results show that the magnetization and magnetocrystalline anisotropy are closely related to the distributions of Zn–Sn ions on the five inequivalent crystal sites provided by the hexagonal structure of the ferrite. Mössbauer spectra show that the Zn–Sn ions preferentially occupy the [formula omitted] and [formula omitted] sites. The preference for these sites is responsible for the anomalous increase in the magnetization at low Zn–Sn substitutions. Based on microwave measurements of reflectivity, [formula omitted] is a good candidate for electromagnetic compatibility and other practical applications at high frequencies. © 2010, American Institute of Physics. All rights reserved.