Micromagnetic Research Of Ferromagnetic Skyrmion-based Diode

Traditional electronic technologies face many challenges,such as the scalability of equipment and improvement of performance.Spintronics has a lot of supporters because of its special property,spin,and is expected to propel electronic devices into the next era.The magnetic skyrmion is a topologically stable nanoscale magnetization configuration.It is a potential building block for the next generation of electronic devices due to its small size,good stability and low driving current threshold.However,the Magnus force acted on a ferromagnetic skyrmion can induce a transverse motion perpendicular to the driving force,which may lead to the destruction of skyrmions at sample edges.In this thesis,the micromagnetic research of the ferromagnetic skyrmion-based diode is introduced,and a diode model which can effectively suppress the lateral drift and realize one-way motion of the skyrmion is proposed.Here,we computationally demonstrate that the nanotrack edge with high magnetic perpendicular anisotropy(PMA),which is controlled by the voltage-controlled magnetic anisotropy(VCMA)effect,not only enables the safe motion of skyrmions along the nanotrack,but also increases the skyrmion velocity.The speed of the skyrmion increased by at least 11.66 percent compared to the unapplied voltage.On the other hand,one-way motion of skyrmions can be realized by applying voltage to create a local area with high PMA near the nanotrack edge.In addition,we show a design framework for skyrmion diode similar to the P-N junction.Our results may provide theoretical guidelines for designing skyrmion diode.