1. Department of Physics, The University of Burdwan, GolapbagBurdwan West Bengal713104India
2. Department of Physics, Academy of Science, Aidco NagarHooghlyWest BengalIndia
3. Department of Physics, Vivekananda CollegeBurdwan West Bengal713103India
4. Department of Physics, University of SurreyUK
5. UGC-DAE Consortium for Scientific ResearchKolkata 700 098India