Spin-wave propagation through a magnonic crystal in a thermal gradient

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Langner, T (Autor) Outra; Bozhko, DA (Autor) Outra; Bunyaev, SA (Autor) FCUP; G.N. Kakazei (Autor) FCUP; Chumak, AV (Autor) Outra; Serga, AA (Autor) Outra; Hillebrands, B (Autor) Outra; Vasyuchka, VI (Autor) Outra

Revista

Título: Journal of Physics D: Applied Physics

Vol. 51 Nº 464001

ISSN: 0022-3727

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 15 Citações

Scopus - 17 Citações

Outras Informações

ID Authenticus: P-00P-DDJ

DOI: 10.1088/1361-6463/aad2ac

Abstract (EN): The properties of a magnonic crystal are expected to be strongly influenced by the presence of a thermal gradient. We investigated the propagation of backward volume and surface magnetostatic spin-waves in a ID magnonic crystal (MC) exposed to a continuous spatial temperature gradient. It is shown that the thermal gradient applied along the propagation direction leads to a frequency shift and a modification of the transmission characteristics of the spin-waves. The frequency shift is caused by a variation in saturation magnetization due to the change in absolute temperature. The altered transmission manifests itself in a broadening of MC band gaps and the corresponding narrowing of the MC passbands and is understood to be a result of a spatial transformation of the spin-waves wavelengths in a thermal gradient. Furthermore, the transmission characteristics of spin-waves in a thermal gradient have been verified by numerical calculations based on the approach of the transmission matrix. The results of the calculations demonstrate a good agreement with the experimentally measured data.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7