  We investigate the electronic reconstruction at the interface between
ferromagnetic metallic (FM) and antiferromagnetic insulating (AFI) manganites
in superlattices using a two-orbital double-exchange model including
superexchange interactions, Jahn-Teller lattice distortions, and long range
Coulomb interactions. The magnetic and the transport properties critically
depend on the thickness of the AFI layers. We focus on superlattices where the
constituent parent manganites have the same electron density n = 0.6. The
induced ferromagnetic moment in the AFI layers decreases monotonically with
increasing layer width, and the electron-density profile and the magnetic
structure in the center of the AFI layer gradually return to the bulk limit.
The width of the AFI layers and the charge-transfer profile at the interfaces
control the magnitude of the magnetoresistance and the metal-insulator
transition of the FM/AFI superlattices.
