Anomalies in the dynamics of ferrimagnets near the angular momentum compensation point

Abstract

In this paper, we elaborate analytical theory of domain wall dynamics close to the angular momentum compensation point based on non-linear dynamic equations derived from the effective Lagrangian of a ferrimagnet. Analysis of the precession angle and domain wall velocity oscillations in post Walker regime in a ferrimagnet is performed. In the framework of the proposed model, we explore dynamic processes in the Walker and post Walker regimes. We show that although spin oscillations quench the dynamics of domain walls near the Walker breakdown field, a further increase of the driving magnetic field increases domain wall speed and mobility. An anomalous behavior of domain wall dynamic properties near the angular momentum compensation point in ferrimagnets is discussed.

arXiv comment16 pages, 4 figures

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Cited by in corpus (2)

• Domain wall dynamics of ferrimagnets induced by spin-current near the angular momentum compensation temperature
• On field-driven domain wall motion in compensated ferrimagnetic nanowires