Phys.org December 11, 2024
An international team of researchers (USA – Texas Tech University, China, Saudi Arabia, Sweden Japan) applied electric current pulses to a magnetic multilayer stripe composed of [Pt/Co]3/Ru/[Co/Pt]3 and observed skyrmion motion opposite to the current direction. Upon continuous pulsing, a reversal in the particles’ motion direction was noted. Experimental and micromagnetic simulation analyses revealed that skyrmions in the upper and lower ferromagnetic layers of the multilayer system exhibited different helicities, forming a hybrid synthetic ferromagnetic skyrmion. The helicity switch of the hybrid structure accounted for the motion reversal. According to the researchers their study introduces innovative helicity control methods, advancing spintronic device applications, including data storage and quantum computing based on skyrmion helicity… read more. Open Access TECHNICAL ARTICLE
Schematic, hysteresis loop, and device structure of multilayer SF skyrmions. Credit: Nature Communications volume 15, Article number: 10463, 2 December, 2024