講演情報
[23p-A201-5]Second harmonic Hall measurement for CoPt thin film formed on highly oriented Pt layer with electrochemical deposition
〇Tongshuang Huang1, Yota Takamura1, Shinji Isogami2, Yuta Saito1, Md. Mahmudul Hasan3, Mikiko Saito3, Shinya Kasai2, Shigeki Nakagawa1 (1.Tokyo Tech., 2.NIMS, 3.Waseda Univ.)
キーワード：
spin-orbit torque、Electrodeposition technique、CoPt alloy
Electrochemical deposition is essential to fabricate magnetic materials for next-generation information storage memory, such as three-dimensional magnetic domain wall motion memory (3D-DWMM). In 3D-DWMM, spin-orbit torque (SOT)-induced magnetization switching is used as a writing operation. Consequently, it is crucial to demonstrate SOT in an electrochemically deposited ferromagnetic layer formed on a heavy metal layer. In the previous work, the authors successfully fabricated ultrathin CoPt films with strong perpendicular magnetic anisotropy with electrochemical deposition. In this study, the authors perform a second harmonic Hall measurement for the electrochemically deposited CoPt film on the Pt layer to detect SOT. Initially, the authors confirmed the anomalous Hall effect (AHE) in the CoPt/Pt Hall bar. Subsequently, the first and second harmonic voltage signals were obtained with ac current flowing under longitudinal and transversal magnetic fields. The results will be presented.