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G. Bhoopathi
Department of Physics, P.S.G. College of Arts and Science, Coimbatore, 641 014, Tamil Nadu, India
V. Jayaramakrishnan
Department of Physics, P.S.G. College of Arts and Science, Coimbatore, 641 014, Tamil Nadu, India
K. Ravikumar
Department of Physics, RVS college of Engineering and Technology, Coimbatore, 641 402, Tamil Nadu, India
T. Prasanyaa
Department of Physics, Karunya University, Coimbatore, 641 114, Tamil Nadu, India
S. Karthikeyan
Environmental Technology Division, Council of Scientific & Industrial Research (CSIR)-Central Leather Research Institute (CLRI), Adyar, Chennai, 600 020, India