Magnetic transport properties of DBTAA-based nanodevices with graphene nanoribbon electrodes

•Magnetic transport properties of DBTAA and transition metal-DBTAA with ZGNR electrodes are investigated.•DBTAA system can exhibit giant magnetoresistance, spin-filtering and spin-polarized current rectifying effects.•Introducing of TM atoms has obvious effects on these spin-related effects.

Based on the density functional theory combined with the nonequilibrium Green’s function formalism, the magnetic transport properties of dibenzotetraaza[14]annulene (DBTAA) and transition metal (TM)-DBTAA (TM = Fe and Co) sandwiched between two ferromagnetic zigzag-edge graphene nanoribbon electrodes are investigated. The results show that giant magnetoresistance, spin-filtering and spin-polarized current rectifying effects can be realized simultaneously in the DBTAA system by modulating the external magnetic field. Introducing of TM atoms has obvious effects on these spin-related effects. The mechanisms of these intriguing phenomena are proposed and these phenomena would be instructive in the design of high-performance magnetic nanodevices.

Graphical abstractWe investigate systematically the magnetic transport properties of DBTAA and transition metal (TM)-DBTAA (TM = Fe and Co) sandwiched between two ZGNR electrodes. The results show that giant magnetoresistance, spin-filtering and spin-polarized current rectifying effects can be realized simultaneously in the DBTAA system. And introducing of TM atoms has obvious effects on these effects.Figure optionsDownload full-size imageDownload as PowerPoint slide