Magnetoresistance in magnetic multilayers with the nano-oxide layer

From the linear response Boltzmann transport equation in the relaxation-time approximation, we investigate the structure consisting of magnet-metal-magnet multilayers inserted by the nano-oxide layer. Moreover, we propose a modified Boltzmann transport equation with the appropriate boundary conditions in multilayers instead of solving the complicated coupled equations. We find that the nano-oxide layer causes the decrement of the diffusive scattering effect and the increment of the reflective effect, and the magnetoresistance ratios vary with different positions of the nano-oxide layer. The theoretical results are reasonable in agreement with the experimental data. (C) 2003 American Institute of Physics.