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arXiv: 2204.11595
AbstractSpin‐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.
current‐induced domain wall motion, Condensed Matter - Mesoscale and Nanoscale Physics, Physics, QC1-999, all-optical switching, FOS: Physical sciences, Electric apparatus and materials. Electric circuits. Electric networks, synthetic ferrimagnets, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), all-optical switching, angular momentum compensation, current- induced domain wall motion, synthetic ferrimagnets, TK452-454.4, current-induced domain wall motion, all‐optical switching, angular momentum compensation
current‐induced domain wall motion, Condensed Matter - Mesoscale and Nanoscale Physics, Physics, QC1-999, all-optical switching, FOS: Physical sciences, Electric apparatus and materials. Electric circuits. Electric networks, synthetic ferrimagnets, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), all-optical switching, angular momentum compensation, current- induced domain wall motion, synthetic ferrimagnets, TK452-454.4, current-induced domain wall motion, all‐optical switching, angular momentum compensation
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