Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session VV01: V: Poster Session III (7:00am-8:00am, PST)
7:00 AM,
Wednesday, March 22, 2023
Room: Virtual Room 1
Abstract: VV01.00032 : Realization of spin torque majority gate logic operation with current induced domain wall motion
Presenter:
Dongryul Kim
(Daegu Gyeongbuk Institute of Science and)
Authors:
Dongryul Kim
(Daegu Gyeongbuk Institute of Science and)
Chun-Yeol You
(Daegu Gyeongbuk Institute of Science and Technology)
June-Seo Kim
(Daegu Gyeongbuk Institute of Science and Technology)
Jaehun Cho
(Daegu Gyeongbuk Institute of Science and Technology)
Soobeom Lee
(Daegu Gyeongbuk Institute of Science and Technology)
Seong Bok Kim
(Daegu Gyeongbuk Institute of Science and Technology)
Jun-Su Kim
(Daegu Gyeongbuk Institute of Science and Technology (DGIST))
We selected the Ta/Pt/Co/Ru heterostructure which has perpendicular magnetic anisotropy to implement logic state 1(+mZ) or 0(-mZ). And the magnetization state is observed by the Kerr microscope. The dark region and bright region of images mean +mZ and -mZ direction of magnetization, respectively. And the domain wall motion for the logic operation was driven by the current. To write the domain (logic state) with field-free spin-orbit torque (SOT) switching, we introduce the slab structure[1]. Using this method, we could write the domain in each input area. The output state should be the majority state of the domain for each combination of inputs. we could verify the majority logic operation by evaluating the change of output state into 0(+mZ) state with 001 input. Through this result, we realized the STMG unit cell logic operation as the first stage of the study of a promising spin-based device.
[1] Suhyoek An, et al. Appl. Phys. Lett. 120, 262402 (2022).
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