Affiliation: | 1. Centre for Materials Research, Thiruvalluvar College of Engineering and Technology, Vandavasi 604 505, India;2. Department of Physics, Alagappa University, Karaikudi 630 003, India;3. Crystal Growth Centre, Anna University, Chennai 600 025, India;4. Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku, Naka-Ku, Hamamatsu, Shizuoka 432-8011, Japan |