Kim, Seok-Jong Lee, Dong-Kyu Oh, Se-Hyeok Koo, Hyun Cheol Lee, Kyung-Jin 2024-01-19T14:03:55Z 2024-01-19T14:03:55Z 2022-01-10 2021-07-06 2469-9950 https://pubs.kist.re.kr/handle/201004/116692 We report a theory of spin-torque-induced magnetic resonance in collinear ferrimagnets, i.e., spin-torque ferrimagnetic resonance (ST-FiMR). We find that the rectified DC voltage of ST-FiMR has several distinct features as compared to spin-torque ferromagnetic resonance (ST-FMR) signals. The most important feature of the ST-FiMR signal is that its magnitude due to dampinglike spin-orbit torque is almost linearly proportional to the net spin density, and thus its sign changes near the angular momentum compensation condition. Our result suggests that the conventional ST-FMR line-shape analysis is unable to correctly estimate the magnitude and sign of spin-orbit torque for compensated ferrimagnets. Therefore, the analysis based on the ST-FiMR theory, of which a complete analytic expression is provided in this work, must be applied. English AMER PHYSICAL SOC DOMAIN-WALL VELOCITIES DRIVEN MOTION TEMPERATURE EXCHANGE FILMS Theory of spin-torque ferrimagnetic resonance Article 10.1103/PhysRevB.104.024405 1 Physical Review B, v.104, no.2 Physical Review B 104 2 scie scopus 000671585600005 2-s2.0-85109219661 Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Materials Science Physics Article DOMAIN-WALL VELOCITIES DRIVEN MOTION TEMPERATURE EXCHANGE FILMS spin torque ferrimagnetic resonance spintronics