Guoqiang Yu

Jun 3, 2024 | nature.com | Jie Qi |Yunchi Zhao |Guang Yang |Guoqiang Yu

AbstractAchieving effective manipulation of perpendicular exchange bias effect remains an intricate endeavor, yet it stands a significance for the evolution of ultra-high capacity and energy-efficient magnetic memory and logic devices. A persistent impediment to its practical applications is the reliance on external magnetic fields during the current-induced switching of exchange bias in perpendicularly magnetized structures.

Aug 21, 2023 | nature.com | Huimin Sun |Guoqiang Yu

AbstractMagnetization in a ferromagnetic layer could be manipulated by the spin-orbit torque whose generation commonly relies on the spin-orbit coupling from the adjacent heavy-metal layer within the bilayer. The fact that the magnetic topological insulator possesses both the ferromagnetic order with perpendicular anisotropy and inherent spin-orbit coupling inspires to realize such a torque-induced magnetization switching without forming any heterostructure with other materials.

May 30, 2023 | nature.com | Delin Zhang |Guoqiang Yu

AbstractThe Orbital Hall effect, which originates from materials with weak spin-orbit coupling, has attracted considerable interest for spin-orbitronic applications. Here, we demonstrate the inverse effect of the orbital Hall effect and observe orbitronic terahertz emission in the Ti and Mn materials. Through spin-orbit transition in the ferromagnetic layer, the generated orbital current can be converted to charge current in the Ti and Mn layers via the inverse orbital Hall effect.

May 18, 2023 | nature.com | Guoqiang Yu

AbstractDiscovering and understanding anomalous anisotropic magnetoresistance (AMR) effects are important aspects of studying the nature of modulated transport. The anisotropic transport coefficients of topological systems are often useful for mapping hidden phases and characterizing topological phase transitions and the evolution of topological electrons.

Mar 30, 2023 | nature.com | Michael E. Reitman |Vincent Tse |Alba Peinado |Guoqiang Yu

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