Abstract
Current-induced perpendicular magnetization switching holds great potential for high-density magnetic storage technology. We report the growth of perpendicularly magnetized [Pt/Co/Pt] multilayers on a collinear altermagnet RuO2(100) thin films. The current-induced effective magnetic field was determined through anomalous Hall effect loop measurements with current applied along the [010] or [001] direction of RuO2(100). Magnetization switching was successfully achieved with the assistance of an in-plane magnetic field. Furthermore, by adjusting the nominal top Pt thickness of the [Pt/Co/Pt] multilayers, we could change the polarity of the current-induced magnetization switching, demonstrating an effective manipulation of spin polarization direction in RuO2/[Pt/Co/Pt]. These results provide a practical approach to the development of perpendicular magnetic devices based on RuO2 and have advanced the study of spin-splitting altermagnets.
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