TY - JOUR
T1 - Ultrafast Racetrack Based on Compensated Co/Gd-Based Synthetic Ferrimagnet with All-Optical Switching
AU - Li, Pingzhi
AU - Kools, T.J.
AU - Koopmans, Bert
AU - Lavrijsen, Reinoud
PY - 2023/1
Y1 - 2023/1
N2 - Spin-orbitronics and single pulse all-optical switching (AOS) of magnetization are two major successes of the rapidly advancing field of nanomagnetism in recent years, with high potential for enabling novel, fast, and energy-efficient memory and logic platforms. Fast current-induced domain wall motion (CIDWM) and single shot AOS have been individually demonstrated in different ferrimagnetic alloys. However, the stringent requirement for their composition control makes these alloys challenging materials for wafer scale production. Here, fast CIDWM and energy efficient AOS in a synthetic ferrimagnetic system based on multilayered [Co/Gd]2 are simultaneously demonstrated. First, it is shown that AOS is present in its full composition range. It is found that current-driven domain wall velocities over 2000 m s-1 at room temperature, achieved by compensating the total angular momentum through layer thickness tuning. Furthermore, analytical modeling of the CIDWM reveals that Joule heating needs to be treated transiently to properly describe the CIDWM for our sub-ns current pulses. The studies establish [Co/Gd]-based synthetic ferrimagnets to be a unique materials platform for domain wall devices with access to ultrafast single pulse AOS.
AB - Spin-orbitronics and single pulse all-optical switching (AOS) of magnetization are two major successes of the rapidly advancing field of nanomagnetism in recent years, with high potential for enabling novel, fast, and energy-efficient memory and logic platforms. Fast current-induced domain wall motion (CIDWM) and single shot AOS have been individually demonstrated in different ferrimagnetic alloys. However, the stringent requirement for their composition control makes these alloys challenging materials for wafer scale production. Here, fast CIDWM and energy efficient AOS in a synthetic ferrimagnetic system based on multilayered [Co/Gd]2 are simultaneously demonstrated. First, it is shown that AOS is present in its full composition range. It is found that current-driven domain wall velocities over 2000 m s-1 at room temperature, achieved by compensating the total angular momentum through layer thickness tuning. Furthermore, analytical modeling of the CIDWM reveals that Joule heating needs to be treated transiently to properly describe the CIDWM for our sub-ns current pulses. The studies establish [Co/Gd]-based synthetic ferrimagnets to be a unique materials platform for domain wall devices with access to ultrafast single pulse AOS.
KW - all-optical switching
KW - angular momentum compensation
KW - current-induced domain wall motion
KW - synthetic ferrimagnets
UR - http://www.scopus.com/inward/record.url?scp=85141359289&partnerID=8YFLogxK
U2 - 10.1002/aelm.202200613
DO - 10.1002/aelm.202200613
M3 - Article
SN - 2199-160X
VL - 9
JO - Advanced Electronic Materials
JF - Advanced Electronic Materials
IS - 1
M1 - 2200613
ER -