Preparation of spintronically active ferromagnetic contacts based on Fe, Co and Ni Graphene nanosheets for Spin-Field Effect Transistor

Abstract

Present experimentation reports the interaction between graphene and transition Metal (Fe, Co and Ni), in the context of ferromagnetism. Fe-Graphene, Co-Graphene and Ni-Graphene samples were prepared by simple ex-situ approach followed by probe-sonication technique. The prepared samples were characterized by X-ray diffraction (XRD) technique and Scanning Electron Microscope (SEM) analysis. To study magnetic properties of prepared samples, few tests were performed namely Vibrating Sample Magnetometer (VSM) technique, Magnetoconductance Study, Temperature-dependent Magnetization Measurements and Large positive Magnetoresistance Study. Results obtained were analyzed specially in the context of Spin-Field Effect Transistor (s-FET) application.