Spin injection and magnetoresistance in MoS₂-based tunnel junctions using Fe₃Si Heusler alloy electrodes.

ABSTRACT: Recently magnetic tunnel junctions using two-dimensional MoS₂ as nonmagnetic spacer have been fabricated, although their magnetoresistance has been reported to be quite low. This may be attributed to the use of permalloy electrodes, injecting current with a relatively small spin polarization. Here we evaluate the performance of MoS₂-based tunnel junctions using Fe₃Si Heusler alloy electrodes. Density functional theory and the non-equilibrium Green's function method are used to investigate the spin injection efficiency (SIE) and the magnetoresistance (MR) ratio as a function of the MoS₂ thickness. We find a maximum MR of ~300% with a SIE of about 80% for spacers comprising between 3 and 5 MoS₂ monolayers. Most importantly, both the SIE

SUBMITTER: Rotjanapittayakul W 

PROVIDER: S-EPMC5859281 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature