1. Spin waves in ferrimagnets near the angular magnetization compensation temperature: A micromagnetic study.
- Author
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Sánchez-Tejerina, Luis, Osuna Ruiz, David, Martínez, Eduardo, López Díaz, Luis, Raposo, Víctor, and Alejos, Óscar
- Subjects
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ANGULAR momentum (Mechanics) , *FERRIMAGNETIC materials , *THEORY of wave motion , *CRITICAL temperature , *MAGNETIZATION , *SPIN waves - Abstract
Spin wave propagation along a ferrimagnetic strip with out-of-plane magnetization is studied by means of micromagnetic simulations. The ferrimagnetic material is considered to be formed by two antiferromagnetically coupled sub-lattices. Two critical temperatures can be defined for such systems: that of magnetization compensation and that of angular momentum compensation, both different due to distinct Landé factors for each sub-lattice. Spin waves in the strip are excited by a spin current injected at one of its edges. The obtained dispersion diagrams show exchange-dominated forward volume spin waves. For a given excitation frequency, the Néel vector describes highly eccentric orbits, the eccentricity depending on temperature, whose semi-major axis is oriented differently at distinct locations on the FiM strip. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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