▎ 摘　　要

Spin transport in grapheme-boron nitride nanoribbons with transitional metal impurities was investigated in the framework of density functional theory calculations. Several structures with substitutional magnetic impurities on boron and nitrogen are investigated. Following relaxations, the formation energies are calculated. The ballistic spin currents are obtained using non-equilibrium Green's functions formalism and the spin current polarization is extracted. Relatively high spin current polarizations, as well as pronounced spin current switching behaviors are obtained, depending on the type of the transitional metal impurity. Spin density maps confirm the two types of spin transfer characteristics.