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 T00: Poster Session III (1pm-4pm PST)
1:00 PM,
Thursday, March 9, 2023
Room: Exhibit Hall (Forum Ballroom)
Sponsoring
Unit:
APS
Abstract: T00.00232 : Enhancement of Dzyaloshinskii-Moriya interaction in Pt/CoFe(B)/MgO structure by suppression of FePt phase according to boron addition*
Presenter:
Jun-Su Kim
(Daegu Gyeongbuk Institute of Science and Technology (DGIST))
Authors:
Jun-Su Kim
(Daegu Gyeongbuk Institute of Science and Technology (DGIST))
Gukcheon Kim
(SK hynix Inc.)
Jinwon Jung
(SK hynix Inc.)
Kuyoul Jung
(SK hynix Inc.)
Junghyeok Kwak
(SK hynix Inc.)
Jaehun Cho
(Daegu Gyeongbuk Institute of Science and Technology)
Eunji Lim
(University of Ulsan)
Woo-Yeong Kim
(Korea University)
June-Seo Kim
(Daegu Gyeongbuk Institute of Science and Technology)
Jinyong Jung
(Daegu Gyeongbuk Institute of Science and Technology)
Soobeom Lee
(Daegu Gyeongbuk Institute of Science and Technology)
suhyeok an
(Daegu Gyeongbuk Institute of Science and Technology)
Eungchong Baek
(Daegu Gyeongbuk Institute of Science and Technology)
Dongryul Kim
(Daegu Gyeongbuk Institute of Science and Technology)
Sanghoon Kim
(University of Ulsan)
Chun-Yeol You
(Daegu Gyeongbuk Institute of Science and Technology)
Our results provide implications. Primarily, it suggests that disordered FePt phase can be formed as measurable thickness by inter-mixing at the Pt and Fe(Co) interface, and that the magnitude of DS could be significantly decreased by this phase. It is also proposed that the formation of FePt phase can be effectively suppressed by small addition of boron into CoFeB layer by glass former effect, while maintaining the crystallinity of CoFeB. By this approach, we report notably enhanced DS (up to 1.75 pJ/m) compared to other CoFeB-based systems (up to 1.29 pJ/m), which brings CoFeB one step closer to grafting into the skyrmion-based devices.
*This work was supported by SK hynix, Inc.
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