Bulk Spin Torque‐Driven Perpendicular Magnetization Switching in L10 FePt Single Layer

• DOI: 10.1002/adma.202002607
• Publication Date: 2020-06-29T06:36:25Z
• Authors: Meng Tang; Ka Shen; Shijie Xu; Huanglin Yang; Shuai Hu; Weiming Lü; Changjian Li; Mengsha Li; Zhe Yuan; Stephen J. Pennycook; Ke Xia; Aurelien Manchon; Shiming Zhou; Xuepeng Qiu
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Abstract Due to its inherent superior perpendicular magnetocrystalline anisotropy, the FePt in L 1 0 phase enables magnetic storage and memory devices with ultrahigh capacity. However, reversing state, therefore encoding information, has proven be extremely difficult. Here, it is demonstrated that an electric current can exert a large spin torque on magnet, ultimately leading reversible magnetization switching. The monotonically increases increasing thickness, exhibiting bulk characteristic. Meanwhile, effective fields switching efficiency increase as approaches higher chemical ordering stronger spin–orbit coupling. symmetry breaking generates within shown arise from structural gradient along film normal direction. By artificially gradient, opposite effect demonstrated. At last, role of disorder generating substantial single ferromagnet supported by theoretical calculations. These results will push forward frontier material systems for torques have transformative impact simple architecture, density, readily application.