1. Department of Chemistry, Inorganic Section, Jadavpur University, Kolkata – 700032, India
2. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India
3. Department of Physics, Jadavpur University, Kolkata-700012, India
4. Department of Physics, National Institute of Technology Durgapur, Durgapur-713209, India
5. Departament de Química, Universitat de les Illes Balears, Crta de Vall demossa km 7, 5, 07122 Palma de Mallorca, Baleares, Spain