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Pham Ngoc Luu Ly,Kyun-Hun Ko,Gyung-Min Choi 한국자기학회 2021 한국자기학회 학술연구발표회 논문개요집 Vol.31 No.1
The use of spin-orbit torque (SOT) to manipulate magnetization has shown great potential for the development of ultrafast and energy-efficient MRAM in recent years. In this work, we investigate the current-induced spin-orbit torque in Pt<sub>x</sub>Mn<sub>1-x</sub>/NiFe heterostructure by varying the composition of PtMn alloy. We use the optical method base on the magneto-optical Kerr effect to detect the current-induced magnetization rotation both in-plane and out-of-plane directions. By analyzing quadratic MOKE and linear MOKE responses we extract damping-like and field-like components of spin-orbit torque. We also determine composition dependence spin Hall angle for all samples.