Details

Autor(en) / Beteiligte

• Yen, Cheng-Tyng
• Chen, Wei-Chuan
• Wang, Ding-Yeong
• Lee, Yuan-Jen
• Shen, Chih-Ta
• Yang, Shan-Yi
• Tsai, Ching-Hsiang
• Hung, Chien-Chung
• Shen, Kuei-Hung
• Tsai, Ming-Jinn
• Kao, Ming-Jer

Titel

Reduction in critical current density for spin torque transfer switching with composite free layer

Ist Teil von

• Applied physics letters, 2008-09, Vol.93 (9), p.092504-092504-3

Ort / Verlag

American Institute of Physics

Erscheinungsjahr

2008

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A composite free layer (CFL) consisting of a soft layer and a hard layer exchange coupled in parallel is proposed. The experimental results showed that the critical current density ( J c ) can be reduced from 7.05 × 10 6 A ∕ cm 2 of strong coupled Co Fe B ( 12.5 Å ) ∕ Ru ( 4 Å ) ∕ Ni Fe ( 17.5 Å ) CFL to 2.65 × 10 6 A ∕ cm 2 of weak coupled Co Fe B ( 12.5 Å ) ∕ Ru ( 15 Å ) ∕ Ni Fe ( 17.5 Å ) CFL. The macrospin simulations showed that the soft layer of CFL can assist the hard layer of CFL to switch at a lower J c . These results suggest that by using CFL, it is possible to reduce the J c of spin torque transfer switching without compromising the thermal stability.