1. Materials Science Research Laboratory Shrikrishna Mahavidyalaya Gunjoti Osmanabad MS 413606 India
2. Department of Physics Y. C. College Tuljapur Osmanabad MS 413602 India
3. Department of Physics HKE's A. V. Patil Degree College Aland, KA Kalburgi 585302 India
4. Department of Physics and Astronomy College of Science, King Saud University P.O. Box 2455 Riyadh 11451 Saudi Arabia
5. King Abdullah Institute For Nanotechnology King Saud University P.O. Box 2455 Riyadh 11451 Saudi Arabia
6. Department of Physics Vivekanand College Chatrapati Sambhajinagar MS 431001 India
7. School of Materials Science and Engineering University of New South Wales Sydney NSW 2052 Australia