Publication:
Spin waves in ferrimagnets near the angular magnetization compensation temperature: a micromagnetic study

Date

2024

Authors

Sánchez-Tejerina, Luis
Martínez, Eduardo
López-Díaz, Luis
Raposo Víctor
Alejos, Óscar

Director

Publisher

American Institute of Physics
Acceso abierto / Sarbide irekia
Artículo / Artikulua
Versión publicada / Argitaratu den bertsioa

Project identifier

AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-117024GB-C41/ES/recolecta
European Commission/Horizon 2020 Framework Programme/860060openaire

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.

Description

Keywords

Spin waves, Ferrimagnets, Magnetization compensation

Department

Ingeniería Eléctrica, Electrónica y de Comunicación / Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza

Faculty/School

Degree

Doctorate program

item.page.cita

Sanchez-Tejerina, L., Osuna Ruiz, D., Martínez, E., López-Díaz, L., Raposo V., Alejos, Ó. (2024). Spin waves in ferrimagnets near the angular magnetization compensation temperature: a micromagnetic study. Applied Physics Letters, 125(8). https://doi.org/10.1063/5.0189745.

item.page.rights

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