Bistable perpendicular switching with in-plane spin polarization and without external fields

作者：Eason Kwaku^*; Tan Seng Ghee; Jalil Mansoor Bin Abdul; Khoo Jun Yong

来源：Physics Letters, Section A: General, Atomic and Solid State Physics , 2013, 377(37): 2403-2407.

DOI：10.1016/j.physleta.2013.07.001

• Spin-orbit interactions
• SOI
• Micromagnetics
• Rashba
• In-plane spin polarization

To-date, all experiments switching perpendicular magnetic anisotropy (PMA) materials with in-plane spin polarization require external B-fields. Here, in two approaches, it is shown that with Rashba-type in-plane spin polarization and PMA, bistable switching is achievable without external B-fields, and at currents on the order of 10(7) A/cm(2), consistent with recent experiments. Utilization of PMA is primarily discussed, demonstrating the potential for two possibilities: (1) in-plane polarization as a 'natural' candidate for precessional switching and (2) bistable switching using a tilted anisotropy axis. Both are shown to lead to stable perpendicular switching without an external B-field, even though spin polarization is in-plane.

• 出版日期2013-11-8