Table 4.

Calculated values of lattice strain and micro-strain for NFO, MNFO, and ZNFO spinel ferrites.

Samples	Lattice strain by formula (ε = $\frac{\beta }{4tan\theta }$)	Micro-strain by formula (ε = $\frac{\beta cos\theta }{4}$)	W–H micro-strain (ε = $slope)$	SSP micro-strain (ε = 2 $\sqrt{\mathit{slope}}$)
FO	0.00357	0.00126	– 0.00047	–
MNFO	0.00288	0.00103	– 0.00022	0.0043
ZNFO	0.00478	0.00155	– 0.0015	–