Resonant excitation of the domain wall oscillations by a parallel current under spin injection
R. J. Elliott (1), E. M. Epshtein (2), Yu. V. Gulyaev (2), P. E., Zilberman (2) ((1) Oxford University, Department of Physics, Theoretical, Physics, Oxford, UK, (2) Institute of Radio Engineering, Electronics,, Russian Academy of Sciences, Fryazino, Russia)
TL;DR
This paper explores how a spin-polarized ac current can resonantly excite domain wall oscillations in a ferromagnetic film, revealing nonlinear effects like rectification and harmonic generation.
Contribution
It introduces a theoretical framework for resonant excitation of domain walls by spin injection and predicts observable nonlinear phenomena.
Findings
Resonant frequencies of domain wall oscillations are calculated.
Amplitude of forced oscillations is determined.
Nonlinear effects such as rectification and second harmonic generation are predicted.
Abstract
A possibility is discussed of observing spin injection effect on the ferromagnet domain structure by means of resonant excitation of the domain wall oscillations by a spin-polarized ac injection current. The natural frequency of the domain wall oscillations in a thin ferromagnetic film with parallel anisotropy is calculated. Amplitude of the domain wall forced oscillations excited by the spin-polarized ac current is determined. Then effect of such oscillations on the current is considered and appearance of nonlinear phenomena such as rectification of the ac current and second harmonic generation is predicted.
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Taxonomy
TopicsMagnetic properties of thin films · Quantum and electron transport phenomena · Magnetic Properties and Applications