Lee, Hyun-Jun Yoon, Ji-won Ahn, Soeun Han, Dong-Soo Park, Byong-Guk Ju, Byeong-Kwon Baek, Seung-heon Chris 2025-05-22T07:00:18Z 2025-05-22T07:00:18Z 2025-05-21 2025-05 0018-9464 https://pubs.kist.re.kr/handle/201004/152504 Spin-orbit torque (SOT) is a phenomenon where spin current, generated by applying charge current to heavy metals (HMs) with strong spin-orbit coupling (SOC), is used to control the magnetization of a ferromagnetic (FM) layer. In this study, we investigate the SOT properties and power consumption of Ta/Pt multilayered SOT channel devices. By varying the Pt concentration in the Ta channel, the spin Hall angle transitions from negative (Ta-like) to positive (Pt-like), with Ta20Pt80 achieving an 18% increase in spin Hall angle compared to pure Ta. Furthermore, as the Pt concentration increases, the resistivity of the channel decreases, leading to improved power consumption efficiency. Finally, we analyze the overall power consumption efficiency of the channel material, considering both resistivity and spin Hall angle. The result is that the power consumption of Ta20Pt80 improved by x6.1 compared to that of a pure Ta. English Institute of Electrical and Electronics Engineers Efficiency Enhancement in Spin-Orbit Torque MRAM With Low Resistivity and High Spin Hall Angle in Ta/Pt Multilayer Channel Article 10.1109/TMAG.2025.3552339 1 IEEE Transactions on Magnetics, v.61, no.5 IEEE Transactions on Magnetics 61 5 N scie scopus 001477385700012 2-s2.0-105003768088 Engineering, Electrical & Electronic Physics, Applied Engineering Physics Article MAGNETIZATION SYMMETRY Conductivity Power demand Current measurement Pollution measurement Temperature measurement Magnetic field measurement Voltage measurement Nonhomogeneous media Resistance Energy efficient magnetic memory spin-orbit torque (SOT) Electrical resistance measurement