[14p-2J-5~18] 10.2 Spin torque, spin current, circuits, and measurement technologies

△ [14p-2J-5] Fast spin-transfer-torque switching in a spin-valve nanopillar having a conically magnetized free layer

〇Rie Matsumoto¹, Hiroko Arai^2,1, Shinji Yuasa¹, Hiroshi Imamura¹ (1.AIST, 2.PRESTO, JST)

Keywords:Spintronics,MRAM,Spin-transfer torque

Spin-transfer-torque switching in a spin-valve nanopillar with a conically magnetized free layer (c-FL) was theoretically studied using the macrospin model. The c-FL is shown to have advantages such as a low switching current density and short switching time compared with a perpendicularly magnetized free layer (p-FL). A c-FL with a thermal stability of 60k_BT exhibited a switching current density 22% smaller and a switching time 60% shorter than those of a p-FL with the same thermal stability.