Affiliation: | 1.Research and Development centre, Bharathiar University, Coimbatore, 641 046, India ;2.Department of Physics, Vidya Vikas Institute of Engineering and Technology, Mysuru, 570 028, India ;3.Department of Studies in Physics, Kuvempu University, Shimoga, 577 451, India ;4.Department of Physics, IDSG Govt. College, Chickmagalur, Karnataka, India ; |