Phys.org  October 17, 2024 The insensitive magneto-electric responses of antiferromagnets (AFMs) make controlling them in domain-wall devices challenging. An international team of researchers (Japan, USA – UCLA) demonstrated a current-driven fast magnetic octupole domain-wall (MODW) motion in Mn3X. The magneto-optical Kerr observation showed that the Néel-like MODW of Mn3Ge could be accelerated up to 750 m s-1 with a current density of only 7.56 × 1010 A m-2 without external magnetic fields. The MODWs showed high mobility with a small critical current density. They theoretically extended the spin-torque phenomenology for domain-wall dynamics from collinear to noncollinear magnetic systems. According to the researchers […]