1. Plasma Laboratory – PPGCEM/UFPI, Federal University of Piauí, Teresina, Brazil
2. Mechanical Engineering Department, Federal University of Rio Grande do Norte – UFRN, Natal, Brazil
3. Department of Physics, Women University of Azad Jammu and Kashmir, Bagh, Pakistan
4. Department of Physics, University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan