TY - JOUR
T1 - Tunneling magnetoresistance effect in MnGa based perpendicular magnetic tunnel junction with Fe/Co interlayer
AU - Ma, Qinli
AU - Mizukami, Shigemi
AU - Kubota, Takahide
AU - Zhang, Xianmin
AU - Sugihara, Atsushi
AU - Naganuma, Hiroshi
AU - Oogane, Mikihiko
AU - Ando, Yasuo
AU - Miyazaki, Terunobu
N1 - Funding Information:
This work was partly supported by the Strategic Japanese−German cooperative program ASPIMATT (JST) and the Asahi glass foundation foundation.
PY - 2013/10/28
Y1 - 2013/10/28
N2 - In order to enhance the magnetoresistance (MR) of perpendicular magnetic tunnel junctions (pMTJs) based on MnGa alloys, a single ferromagnetic layer such as Fe and Co was previously inserted between MnGa and MgO barrier. In this study, to further enhance the spin-filter effect, we introduced a Fe/Co bilayer as an interlayer in the MnGa/MgO interface. Compared to the single Co interlayer, an apparent MR ratio enhancement was obtained when Fe layer thickness was around 0.3 nm for pMTJs with MnGa compositions of Mn 57Ga43, Mn62Ga38, and Mn 70Ga30, and the maximum MR ratio reaches 50% at room temperature. In addition, inverted magnetoresistance loops were observed due to the antiparallel alignment of the magnetic moments of Co and MnGa layers separated by the thin Fe layer.
AB - In order to enhance the magnetoresistance (MR) of perpendicular magnetic tunnel junctions (pMTJs) based on MnGa alloys, a single ferromagnetic layer such as Fe and Co was previously inserted between MnGa and MgO barrier. In this study, to further enhance the spin-filter effect, we introduced a Fe/Co bilayer as an interlayer in the MnGa/MgO interface. Compared to the single Co interlayer, an apparent MR ratio enhancement was obtained when Fe layer thickness was around 0.3 nm for pMTJs with MnGa compositions of Mn 57Ga43, Mn62Ga38, and Mn 70Ga30, and the maximum MR ratio reaches 50% at room temperature. In addition, inverted magnetoresistance loops were observed due to the antiparallel alignment of the magnetic moments of Co and MnGa layers separated by the thin Fe layer.
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U2 - 10.1063/1.4828483
DO - 10.1063/1.4828483
M3 - Article
AN - SCOPUS:84887310663
SN - 0021-8979
VL - 114
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 16
M1 - 163913
ER -