Spin-orbit torque switching and thermal stability of nanoscale Co/Pt multilayersover a wide range of temperature

摘要

Spintronics memory devices utilizing spin-orbit torques (SOTs) [1-3] are promising for ultralow-power and high-performance integrated circuits. To use SOT devices for versatile applications, including automobile and aerospace, they need to ensure wide-temperature operations in nanoscale dimensions. Thus, it is important to understand temperature dependence of the device performance. We have been studying SOT devices with Co/Pt multilayers having high anisotropy and shown SOT-induced magnetization switching in micrometer-scale Hall-bar devices [4]. In this work, we study the temperature dependence of switching characteristics and thermal stability in nanoscale SOT devices with Co/Pt multilayers and discuss the feasibility of Co/Pt multilayers for those applications that require wide-temperature operations.