Ajai Kumar Gupta was awarded his PhD from Delhi University, New Delhi, in the year 2007. After completing PhD, he worked as a Research Associate at Indian Institute of Technology Delhi, New Delhi. He joined Amity University, Noida (U.P.) in 2008. Prof. Gupta joined as Assistant Professor at Department of Pure and Applied Physics, Guru Ghasidas Vishwavidyalaya, Bilaspur (Chhattisgarh) in 2011. He joined as Professor at Department of Physics, Mahatma Gandhi Central University, Motihari (Bihar) in 2019. Prof. Gupta has made significant contributions in the area of magnetotransport properties of layered manganites. He also worked on ZnO, doped BZT, doped PLZT, delafossites and molybdates. Currently, his research interests are in the area of structural phase transitions in Spinels and antibacterial & photocatalytic applications of spinels, molybdates and delafossites. Over the years, he published several research articles in many international journals with high impact factor. Besides fundamental and cutting-edge research, Prof. Gupta is also actively involved in teaching and development of labs.