Work

Analytical dispersion relation for forward volume spin waves in ferrimagnets near the angular momentum compensation condition

Year: 2025

Type: article

Abstract: Antiferromagnetic magnonics has become the focus of intense scientific research because of the advantages of these materials compared to ferromagnets. However, ferrimagnetic materials have received much less attention despite exhibiting similar dynamical features at the angular momentum compensation point. In this paper, we present analytical expressions describing the dispersion relation of forward volume spin waves in ferrimagnetic materials near the angular momentum compensation point. We benchmark the derived dispersion relations against full micromagnetic simulations showing an excellent agreement between both approaches. We predict two different branches for forward volume spin waves in ferrimagnetic materials merging into a single branch at the angular momentum compensation point. Our results can assist in the design of magnonic devices built on ferrimagnetic materials.

Source: Physical review. B./Physical review. B

DOI: 10.1103/d71q-hvn2

Authors: Luis Sánchez-Tejerina, David Osuna Ruiz, Víctor Raposo, Eduardo Martínez, Luis López Díaz, Óscar Alejos

Institutions: Universidad de Valladolid, Universidad Pública de Navarra (UPNA), Universidad de Salamanca

Language: English

Topic: Magnetic properties of thin films

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Ministerio de Ciencia, Innovación y Universidades, European Commission, Ministerio de Ciencia e Innovación, Agencia Estatal de Investigación