Sub-terahertz ferrimagnetic spin-transfer torque oscillator
arXiv:1904.09341 · doi:10.1103/PhysRevB.100.100409
Abstract
A theory of magnetization dynamics in ferrimagnetic materials with antiparallel aligned spin sub-lattices under action of spin-transfer torques (STT) is developed. We consider magnetization dynamics in GdFeCo layers in two cases of magnetic anisotropy: easy plane and easy axis. We demonstrate that, (i) for the easy plane anisotropy the precession of the Néel vector is conical and the cone angle depends on the STT strength and the value of spin non-compensation, while the frequency of precession can reach sub-THz frequencies; (ii) for the easy axis anisotropy two regimes are possible: deterministic switching of the net magnetization and a conical sub-THz precession depending on the STT strength.
5 pages, 5 figures
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Cited by in corpus (13)
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- Dephasing of Transverse Spin Current in Ferrimagnetic Alloys
- Ultrathin ferrimagnetic GdFeCo films with very low damping
- Spin-Hall nanooscillator based on an antiferromagnetic domain wall
- Effects of spin-orbit torque on the ferromagnetic and exchange spin wave modes in ferrimagnetic CoGd alloy
- Spatially Nonuniform Oscillations in Ferrimagnets Based on an Atomistic Model
- Manipulating Ferrimagnets by Fields and Currents
- Synchronization properties and reservoir computing capability of hexagonal spintronic oscillator arrays
- Voltage-Controlled High-Bandwidth Terahertz Oscillators Based On Antiferromagnets
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