  A series of Ni0.6-x/2Zn0.4-x/2SnxFe2O4 (x = 0.0, 0.05, 0.1, 0.15, 0.2 and
0.3) (NZSFO) ferrite composites have been synthesized from nano powders using
standard solid state reaction technique. The spinel cubic structure of the
investigated samples has been observed by the X-ray diffraction (XRD). The
magnetic properties such as saturation magnetization (Ms), remanent
magnetization (Mr), coercive field (Hc) and Bohr magneton (B) are calculated
from the hysteresis loops. The value of Ms is found to decrease with increasing
Sn content in the samples. This change has been successfully explained by the
variation of A-B interaction strength due to Sn substitution in different
sites. The compositional stability and quality of the prepared ferrite
composites have also been endorsed by the fairly constant initial permeability
(/) over a wide range of frequency region. The decreasing trend of / with
increasing Sn content has been observed. Curie temperature (TC) has found to
increase with the increase in Sn content. Wide spread frequency utility zone
indicates that the NZSFO can be considered as a good candidate for use in
broadband pulse transformer and wide band read-write heads for video recording.
The abnormal behavior for x = 0.05 has been explained with existing theory.
