Higher magnetic Mn doped Zn-Cr oxide nanoparticles with general compositional formula MxZn0.95-xCr0.05O have
been synthesized by using sol-gel auto combustion technique. Room temperature X-ray diffraction (XRD) technique has been
employed to study the structural and microstructural parameters of the as-prepared samples. XRD analysis confirms the phase
purity and hexagonal wurtzite structure of all the samples. Replacement of Zn2+ ions by Mn2+ ions shifts peak positions slightly
towards the lower angles which in turn expands the lattice lengths ‘a’ from 3.2487 to 3.2528 Å and ‘c’ from 5.2043 to 5.2118 Å.
Crystallite size obtained from Scherrer equation was confirmed by Williamson – Hall (W-H) and size – strain plot methods
(SSP). Both W-H and SSP methods reveals the tensile type strain for undoped sample and comprehensive type strain for Mn2+
doped samples. Magnetic properties were investigated by using vibrating sample magnetometer.
