Affiliation: | 1. Department of Physics , Centre for Piezoelectric Transducer Materials, Andhra University , Visakhapatnam, India konapala@sify.com;3. Department of Physics , GVP College of Engineering , Visakhapatnam, India;4. Department of Basic Science &5. Humanities , GIT, GITAM University , Visakhapatnam, India;6. Department of Physics , Centre for Piezoelectric Transducer Materials, Andhra University , Visakhapatnam, India |