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

ABSTRACT

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 crystallite size $\left(t_{311}\right)$ 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 $\sqrt{N}Vs\left(1/d\right)$ 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 (ΔH_pp) were used to examine the γ-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.

KEYWORDS:

• Cobalt nanoparticles
• atomic force microscopy
• Williamson–Hall function
• gamma irradiation
• electron spin resonance

Code availability

The authors declare that no software or codes have been used in this research. All data are represented in the form of graphs.

Data availability statement

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Aruna G. Patil

Prof. Aruna G. Patil, is professor at Department of Physics, Vivekanand Arts, Sardar Dalipsingh commerce and science college, Aurangabad 431004, India. She has completed her Ph.D. from Dr. Babasaheb Ambedkar Marathwada University, Aurnagabad having 30 years of teaching experience. She has completed research project and guided the research scholars in her research activities. She has research interest in nanomaterials.

Atul P. Keche

Dr. Atul P. Keche, is working as an assistant professor at Department of Physics, Shri Muktanand college, Gangapur, Aurangabad, India. His research profile has covered the wide range of topics related to ferrite nanomaterials, synthesis methods and characterization technics.

S. V. Rajmane

Dr. S.V. Rajmane, is working as an assistant professor at Department of Physics, Jawahar College, Andur, Tq. Tuljapur, Osmanabad 413603, India. He has completed his PhD from Dr. Babasaheb Ambedkar Marathwada University, Aurnagabad.

Anil V. Raut

Dr. Anil V. Raut is working as an assistant professor at Department of Physics, Vivekanand Arts, Sardar Dalipsingh commerce and science college, Aurangabad 431004, India. He has completed his Ph.D. from Dr. Babasaheb Ambedkar Marathwada University, Aurnagabad and have a good number of research publication in reputed international journals. His research work is cited by the research community belongs to the magnetic nanoparticles.