W-H plot and electron spin resonance spectroscopy of magnetic CoFNPs induced up to 100 kGy Co60 gamma-rays

In this paper, we portray the simulation of continuous-wave electron spin resonance (ESR) of magnetic cobalt ferrite nanoparticles (CoFNPs) which were assembled using simple sol-gel auto-combustion synthesis and irradiated with gamma dose up to 100 kGy. An emphasis has been given for estimating the crystal-lite size (t(311)) by re-evaluating Debye-Scherrer's value with the Williamson-Hall extrapolation function (W-H plot) drawn from X-Ray Diffraction (XRD) data. Also, the lattice parameter was re-confirmed via root NVs(1/d) plots. The SEM images have supported the nanosize of the CoFNPs and the skewed histogram chart has suggested the average grain distribution range 96.18-123.49 nm +/- 10. The topology of the samples was studied by the atomic force microscopy images. In the first derivative peak of ESR spectroscopy, an isotropic value, i.e. gyroscopic spitting factor (Lande's g-value), and line width (Delta H-pp) were used to examine the gamma-radiation damage in the investigated CoFNPs samples. The present analysis may help an individual to comprehend the innumerable intra-atomic and molecular constraints affecting the subsequent physical properties of ferrite nanoparticles.