National University of Singapore

Kaiming Cai

Hyunsoo Yang

Yang Liu

Shuyuan Shi

Described is a spin torque device, and a spintronics device Incorporating the spin torque device. The spin torque device comprises a magnetic layer having a switchable magnetisation direction along a first axis, and a spin source layer adapted to generate a spin current from a current Injected along a second axis perpendicular to the first axis. Electrons of different spins in the spin source layer are rearranged by scattering so the spin current is generated in a plane perpendicular to the second axis and polarized at an angle to the first axis, so that the spin current diffuses into the magnetic layer to produce spin torque to switch the magnetisation direction.

Spin torque device having a spin current polarized at a canting angle of out-of-plane spin

A spin-orbit torque deviceis described. In an embodiment, the spin-orbit torque devicecomprises: a first pinning regionhaving a first fixed magnetization direction; a second pinning regionhaving a second fixed magnetization direction which is in a different direction to the first fixed magnetization direction; a magnetic layerhaving a switchable magnetization direction; and a spin source layerconfigured to generate a spin current for propagating a domain wall between the first and second pinning regionsto switch the switchable magnetization direction of the magnetic layerbetween the first and second fixed magnetization directions.

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Singapore, Singapore

Kaiming Cai