Department of Physics, National Institute of Technology Karnataka, Surathkal, 575025, India, Spintronics and Vacuum Nanoelectronics Laboratory, University of Cincinnati, Cincinnati, Ohio, 45040, USA, Department of Electronics and Communication Engineering, Tezpur University, Tezpur, Assam, 784028, India, Department of Chemistry, National Institute of Technology Karnataka, Surathkal, 575025, India, Department of Materials Science and Engineering, Kyushu Institute of Technology, Tobata-ku, Kitakyushu, 804-8550, Japan, Das, Partha Pratim, Cahay, Marc, Kalita, Shashikala, Mal, Sib Sankar, Jha, Alok Kumar, Department of Physics, National Institute of Technology Karnataka, Surathkal, 575025, India, Spintronics and Vacuum Nanoelectronics Laboratory, University of Cincinnati, Cincinnati, Ohio, 45040, USA, Department of Electronics and Communication Engineering, Tezpur University, Tezpur, Assam, 784028, India, Department of Chemistry, National Institute of Technology Karnataka, Surathkal, 575025, India, Department of Materials Science and Engineering, Kyushu Institute of Technology, Tobata-ku, Kitakyushu, 804-8550, Japan, Das, Partha Pratim, Cahay, Marc, Kalita, Shashikala, Mal, Sib Sankar, and Jha, Alok Kumar