Tang, JinkeDai, JianbiaoWang, KaiyingZhou, WeilieRuzycki, NancyDiebold, Ulrike2024-02-122024-02-122002-05-15https://wyoscholar.uwyo.edu/handle/internal/6248https://doi.org/10.15786/wyoscholar/9757A film of magnetic Fe3C islands separated by nanochannels of graphite was prepared with pulsed laser deposition on a Si substrate with a native SiO2 surface. When the temperature is increased above 250 K the resistance suddenly drops because electron conduction switches from the film to the Si inversion layer underneath. The film shows a negative magnetoresistance. The inversion layer exhibits a large positive magnetoresistance. The transition to the low resistance channel can be reversed by applying a large measuring current, making possible current-controlled switching between two types of electron magnetotransport at room temperature.enghttps://creativecommons.org/licenses/by/4.0/Physical Sciences and Mathematicsjournal contribution10.1063/1.1447880