TY - JOUR
T1 - Effect of interlayer coupling of synthetic ferrimagnetic free layer on current induced magnetization switching in MTJs
AU - Sugano, R.
AU - Ichimura, M.
AU - Takahashi, S.
AU - Maekawa, S.
N1 - Funding Information:
This work was supported in part by the Next Generation Supercomputing Project, under the Nanoscience Program, MEXT, Japan.
PY - 2010/6
Y1 - 2010/6
N2 - In order to study the effect of the interlayer exchange coupling of synthetic ferrimagnetic (SyF)-free layer on the current induced magnetization switching (CIMS) in magnetic tunnel junctions (MTJs), in the thermal activation regime, we examine the magnetization dynamics of MTJs with the SyF-free layer based on a macrospin model, combining with the STT analysis. Compared with the MTJ with a single layer, the reduction of the critical current (Jc) is observed in the MTJ with the SyF-free layer. The considerable reduction of Jc is also observed in MTJs with the ferromagnetically coupled-free layer over that with the antiferromagnetically coupled free layer. In connection with CIMS in each SyF-free layer of the MTJ, we found two different types of CIMS dependent on Jex, that is, decoupled CIMS and coupled CIMS.
AB - In order to study the effect of the interlayer exchange coupling of synthetic ferrimagnetic (SyF)-free layer on the current induced magnetization switching (CIMS) in magnetic tunnel junctions (MTJs), in the thermal activation regime, we examine the magnetization dynamics of MTJs with the SyF-free layer based on a macrospin model, combining with the STT analysis. Compared with the MTJ with a single layer, the reduction of the critical current (Jc) is observed in the MTJ with the SyF-free layer. The considerable reduction of Jc is also observed in MTJs with the ferromagnetically coupled-free layer over that with the antiferromagnetically coupled free layer. In connection with CIMS in each SyF-free layer of the MTJ, we found two different types of CIMS dependent on Jex, that is, decoupled CIMS and coupled CIMS.
KW - Current induced magnetization reversal
KW - Interlayer exchange coupling
KW - Spin torque
KW - Synthetic ferrimagnetic-free layer
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U2 - 10.1109/TMAG.2010.2042149
DO - 10.1109/TMAG.2010.2042149
M3 - Article
AN - SCOPUS:77952836992
SN - 0018-9464
VL - 46
SP - 2136
EP - 2139
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 6
M1 - 5467483
ER -