Micromagnetic simulation for probabilistic magnetization switching process of a spin-orbit true random number generator

• 作者： Yi Cao ( 1 ) ; Nan Zhang ;
• 作者单位： 1.Beijing Academy of Quantum Information Sciences;
• 提交时间：2021-12-18

摘要： True random number generator (TRNG) is an important component for modern information security technologies. Among the candidates, TRNG with spin-orbit torque (SOT)-induced probabilistic magnetization switching is competitive for its advantages in anti-radiation, unlimited endurance, robust stability, and broad temperature range. However, realization of a SOT-TRNG requires intensive understanding of the magnetic dynamic process under a spin-orbit current. Here, we performed micromagnetic simulation of the SOT-induced probabilistic magnetization switching by using Mumax 3. Without thermal noise, identical magnetic moment precessions were found between repeated simulation cycles, resulting in deterministic magnetization switching. When thermal noises were taken into account, stochastic precession trails and thereby probabilistic magnetization switching were finally obtained. Our results suggest the Mumax 3 to be a practical tool for simulating the probabilistic magnetization switching behavior of a SOT-TRNG, as well as highlighting the crucial role of thermal noise during the during the simulation.

• 来自： Yi Cao
• 分类： 物理学 >> 凝聚态:电子结构、电、磁和光学性质
• 引用： ChinaXiv:202112.00121 (或此版本 ChinaXiv:202112.00121V1)
  (doi:10.12074/202112.00121)
  (CSTR:32003.36.ChinaXiv.202112.00121.V1)
• 推荐引用方式：Yi Cao,Nan Zhang.(2021).Micromagnetic simulation for probabilistic magnetization switching process of a spin-orbit true random number generator.CSTR:32003.36.ChinaXiv.202112.00121.V1 (点此复制)