1Department of Physics, Covenant University, Ota, Ogun State, Nigeria
2Department of Pure and Applied Physics, Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria
3Department of Earth Sciences, Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria
4Department of Physics, University of Ibadan, Ibadan, Oyo State, Nigeria