1. Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
2. Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, Texas 77204-5002 United States
3. Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
4. Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte 59072-970, Brazil