Electric-field control of magnetization reversal is promising for lowpower spintronics.Here in a magnet/insulator nanoheterostructure which is the fundamental unit of magnetic tunneling junction in spintronics,we demo...Electric-field control of magnetization reversal is promising for lowpower spintronics.Here in a magnet/insulator nanoheterostructure which is the fundamental unit of magnetic tunneling junction in spintronics,we demonstrate the electric field induced 180°magne-tization switching through a multiscale study combining firstprinciples calculations and finite-temperature magnetization dynamics.In the model nanoheterostructure MgO/Fe/Cu with insu-lator MgO,soft nanomagnet Fe and capping layer Cu,through firstprinciples calculations we find its magnetocrystalline anisotropy linearly varying with the electric field.Using finite-temperature magnetization dynamics which is informed by the first-principles results,we disclose that a room-temperature 180°magnetization switching with switching probability higher than 90%is achievable by controlling the electric-field pulse and the nanoheterostructure size.The 180°switching could be fast realized within 5 ns.This study is useful for the design of low-power,fast,and miniaturized nanoscale electric-field-controlled spintronics.展开更多
基金This work was supported by the National Natural Science Foundation of China(NSFC 11902150)the German Science Foundation(DFG YI 165/1-1 and DFG XU 121/7-1)+1 种基金the Lichtenberg High Performance Computer of TU Darmstadt,the 15^(th) Thousand Youth Talents Program of China,the Research Fund of State Key Laboratory of Mechanics and Control of Mechanical Structures(MCMSI-0419G01)Science and Technology Innovation Project for Returned Overseas Scholars in Nanjing,and a project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.
文摘Electric-field control of magnetization reversal is promising for lowpower spintronics.Here in a magnet/insulator nanoheterostructure which is the fundamental unit of magnetic tunneling junction in spintronics,we demonstrate the electric field induced 180°magne-tization switching through a multiscale study combining firstprinciples calculations and finite-temperature magnetization dynamics.In the model nanoheterostructure MgO/Fe/Cu with insu-lator MgO,soft nanomagnet Fe and capping layer Cu,through firstprinciples calculations we find its magnetocrystalline anisotropy linearly varying with the electric field.Using finite-temperature magnetization dynamics which is informed by the first-principles results,we disclose that a room-temperature 180°magnetization switching with switching probability higher than 90%is achievable by controlling the electric-field pulse and the nanoheterostructure size.The 180°switching could be fast realized within 5 ns.This study is useful for the design of low-power,fast,and miniaturized nanoscale electric-field-controlled spintronics.
