Controllable growth of graphene-edged magnetic carbon films and research on their spin magnetic sensing mechanisms

    In recent years, by introducing graphene edge spin-electron interactions as sensitive principles, the next generation nano spin-magnetic sensor has been rapidly developed. However, the spin-electron interacting mechanisms under different structural features (such as scales, forms) are not clear yet, which have become the bottleneck of the development of such new nano device. Therefore, based on his earlier work at the controllable manufacture of graphene-edged carbon film and their magnetoresistance origins, the applicant proposed the scientific problem of "Spin-magnetic sensing mechanism based on graphene edged magnetic carbon film", integrating the process of graphene growth and edge fabrication, directly growing three types of graphene edge structures which are through structure, dispersing structure and sandwich structure. Magnetic environment Raman spectroscope, magnetic force scanning tunneling microscope are used to reveal the spin orientation under external magnetic field. Physical property measurement system is used to investigate the modulating mechanisms on the transport of itinerary electrons. Systemically explain the deflecting (Hall voltage), scattering (magnetoresistance) and tunneling (magneto tunneling current) of in three types of graphene edged films, and build sensor prototypes based on the above sensing mechanisms. The research outcome has important scientific significance for systemically understanding the edge scale-effect on the spin magnetic sensing mechanisms, and provide support for the scientifically design and manufacture of new spin nano magnetic sensors.