Magnon and phonon assisted tunneling in a high-magnetoresistance tunnel junction using Co$_{75}$Fe$_{25}$ ferromagnetic electrodes

C. Lü; M. W. Wu; X. F. Han

doi:10.1016/j.physleta.2003.10.010

paper

Magnon and phonon assisted tunneling in a high-magnetoresistance tunnel junction using Co $_{75}$ Fe $_{25}$ ferromagnetic electrodes

arXiv:cond-mat/0302210 · doi:10.1016/j.physleta.2003.10.010

Abstract

Magnetoelectric properties of the spin-valve-type tunnel junction of Ta(5\ nm)/Ni $_{79}$ Fe $_{21}$ (25 nm)/Ir $_{22}$ Mn $_{78}$ (10 nm)/Co $_{75}$ Fe $_{25}$ (4 nm)/Al (0.8 nm)-oxide/Co $_{75}$ Fe $_{25}$ (4 nm)/Ni $_{79}$ Fe $_{21}$ (20 nm)/Ta (5 nm) are investigated both experimentally and theoretically. It is shown that both magnon and phonon excitations contribute to the tunneling process. Moreover, we show that there are two branches of magnon with spin $S = 1/2$ and 3/2 respectively. The theoretical results are in good agreement with the experimental data.

4 pages, 6 figures in RevTex format

Magnon and phonon assisted tunneling in a high-magnetoresistance tunnel junction using Co75​Fe25​ ferromagnetic electrodes

Abstract

Magnon and phonon assisted tunneling in a high-magnetoresistance tunnel junction using Co $_{75}$ Fe $_{25}$ ferromagnetic electrodes