Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf
1 PublicationSpin Torque Ferromagnetic Resonance in MgO-based Magnetic Tunnel Junctions
Aleksandrov, Y.; Deac, A. M.; Bernert, K.; Fowley, C.; Sluka, V.; Kowalska, E.; Lindner, J.; Fassbender, J.
Spin polarized currents can exert a torque on a ferromagnetic layer‘s magnetic moment leading to switching or steady-state precession. Spintorque driven ferromagnetic resonance (ST-FMR) is a unique method to measure the magnetic anisotropy, saturation magnetization and damping in a nanoscale structure. ST-FMR can also be used to determine the bias dependence of spin-transfer torques in magnetic tunnel junctions [1- 3]. For different values of applied RF power and DC bias, we swept the RF frequency from 1 to 15 GHz and measured the resulting mixing voltage across our MgO-based tunnel junctions. Not only the low-frequency fundamental mode was observed, but also a higher order mode. We find that the mixing voltage peak shifts with applied DC-field and increases with RF power. Finally, we separate the fieldlike torque contribution from that of the in-plane spin-transfer torque and determine their bias dependence.
Keywords: Spin Excitations; Spin Torque
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- DOI: 10.17815/jlsrf-3-159 is cited by this (Id 18562) publication
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Lecture (Conference)
DPG-Frühjahrstagung der Sektion Kondensierte Materie (SKM), 10.-15.03.2013, Regensburg, Deutschland
Permalink: https://www.hzdr.de/publications/Publ-18562
Publ.-Id: 18562