2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/25544Towards a novel magnetoresistance (MR) device with a carbon nanotube, we propose ``nonmagnetic metal/zigzag nanotube encapsulating magnetic atoms/nonmagnetic metal'' junctions. We theoretically investigate how spin-polarized edges of the nanotube and the encapsulated magnetic atoms influence on transport. When the on-site Coulomb energy divided by the magnitude of transfer integral, $U/|t|$, is larger than 0.8, large MR effect due to the direction of spins of magnetic atoms, which has the magnitude of the MR ratio of about 100%, appears reflecting such spin-polarized edges.4 pages, 3 figures, accepted for publication in Synth. MetalsMesoscale and Nanoscale PhysicsMaterials ScienceComputational Engineering, Finance, and ScienceChemical PhysicsQuantum Physicstext