Enhancement of Damping-Like Spin-Orbit-Torque Efficiency in Synthetic Antiferromagnetic System using Pt-Cu Alloy
2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers)(2023)
摘要
Damping-like spin-orbit torque (SOT) efficiency (effective spin Hall angle: ξ
DL
) is investigated in synthetic antiferromagnetic (AF) systems using Pt-Cu alloy/Ir/Pt-Cu alloy spacer layers. AF interlayer exchange coupling through Pt-Cu alloy/Ir/Pt-Cu alloy spacer layers was observed. We also found that the magnitude of ξ
DL
for synthetic AF system using Pt
57
Cu
43
alloy/Ir/ Pt
57
Cu
43
alloy spacer layer is larger than that for synthetic AF system using Pt/Ir/Pt spacer layer, comparing to devices with nearly similar magnitudes of interlayer exchange coupling of 0.11 mJ/m
2
. The observed maximum magnitude of ξ
DL
is 19.9% for the synthetic AF system using Pt
57
Cu
43
alloy/Ir/Pt
57
Cu
43
alloy. The synthetic AF system will be a promising building block for future nonvolatile high-speed memories and logic circuits using the spin Hall effect.
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关键词
Damping-like Spin-Orbit Torque efficiency,Pt-Cu alloy,Spin Hall Effect,Synthetic Antiferromagnet
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