First-principles study of tunneling magnetoresistance in Fe/MgAl 2 O 4 /Fe(001) magnetic tunnel junctions

  title={First-principles study of tunneling magnetoresistance in Fe/MgAl 2 O 4 /Fe(001) magnetic tunnel junctions},
  author={Yoshio Miura and Shingo Muramoto and Kazutaka Abe and Masafumi Shirai},
  journal={Physical Review B},
We investigated the spin-dependent transport properties of Fe/MgAl${}_{2}$O${}_{4}$/Fe(001) magnetic tunneling junctions (MTJs) on the basis of first-principles calculations of the electronic structures and the ballistic conductance. The calculated tunneling magnetoresistance (TMR) ratio of a Fe/MgAl${}_{2}$O${}_{4}$/Fe(001) MTJ was about 160$%$, which was much smaller than that of a Fe/MgO/Fe(001) MTJ (1600$%$) for the same barrier thickness. However, there was an evanescent state with… 

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