Affiliation: | 1. Centre for Materials Research, Thiruvalluvar College of Engineering and Technology, Ponnur Hills, Vandavasi 604 505, India;2. Post Graduate and Research Department of Physics, Government Arts College, Thiruvannamalai 606 603, India;3. Crystal Growth Centre, Anna University, Chennai 600 025, India;4. Department of Chemistry, V.O. Chidhambaram College, Tuticorin 628 008, India;5. Department of Physics, Alagappa University, Karaikudi 630 003, India;6. Materials Science Division, National Physical Laboratory, Dr. K.S. Krishnan Road, New Delhi 110 012, India |