1. Department of Chemistry, Faculty of Mathematical and Physical Sciences, M. S. Ramaiah University of Applied Sciences, Bangalore 560058, India
2. Department of Physics, Faculty of Mathematical and Physical Sciences, M. S. Ramaiah University of Applied Sciences, Bangalore 560058, India
3. Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
4. Advanced Magnetic Group, Defence Metallurgical Research Laboratory (DMRL), Kanchanbagh, Hyderabad 500058, India
5. Center for Advanced Materials Research (CMR), University of Texas at El Paso, 500 W. Univ. Ave., El Paso, Texas 79968, United States
6. Department of Mechanical Engineering, University of Texas at El Paso, 500 W. Univ. Ave., El Paso, Texas 79968, United States