1. Department of Physics, Savitribai Phule Pune University, Pune 411007, India
2. Department of Physics, Astronomy and Materials Science, Missouri State University, Springfield, Missouri 65897, United States
3. Discipline of Metallurgy Engineering and Materials Science, Indian Institute of Technology, Indore 453552, India
4. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
5. Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
6. Center for Advanced Materials Research (CMR), University of Texas at El Paso, 500 W. Univ. Avenue, El Paso, Texas 79968, United States