Yun, Deok Hyun Kwon, TaeHyuk Han, Ki-Hyuk Lee, Dong Joon Hong, Seokmin Koo, Hyun Cheol Min, Byoung-Chul Ju, Byeong-Kwon Lee, OukJae 2024-01-19T12:00:24Z 2024-01-19T12:00:24Z 2022-07-14 2022-06 0021-8979 https://pubs.kist.re.kr/handle/201004/115103 We present detailed investigations of the magnetic properties of Pt/CoFeB/MgO layers as studied using the angle-resolved spin-torque ferromagnetic resonance method. Although the measurements provide reasonable magnetic parameters, we obtain an unusual value in the interfacial spin transparency if spin-pumping is assumed to be the dominant source for enhancing magnetic damping (alpha(eff)) in the nanometer thickness regime. However, the thickness dependence of the Lande g-factor (g(eff)) for CoFeB indicates that the interfacial spin-orbit coupling plays a role in determining alpha(eff). In addition, the azimuthal asymmetry in the magnetic system may not be related to the possibility of generating unconventional spin polarization. The results in this work are expected to aid in understanding various magnetic properties and current-induced spin-torques in a heavy-metal/ferromagnet bilayer. Published under an exclusive license by AIP Publishing. English American Institute of Physics Investigation of magnetic properties of Pt/CoFeB/MgO layers using angle-resolved spin-torque ferromagnetic resonance spectroscopy Article 10.1063/5.0087919 1 Journal of Applied Physics, v.131, no.24 Journal of Applied Physics 131 24 N scie scopus 000818632900004 Physics, Applied Physics Article ANISOTROPY