1. Advanced
Materials and Devices Laboratory (AMDL), Department of Physics, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India
2. Department
of Physics, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India
3. Materials
Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam 603102, Tamil Nadu, India
4. Department
of Nanoscience and Technology, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India
5. Department
of Medical Physics, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India