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

Title
Spin-wave propagation through a magnonic crystal in a thermal gradient
Type
Article in International Scientific Journal
Year
2018
Authors
Langner, T
(Author)
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Bozhko, DA
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Bunyaev, SA
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FCUP
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G.N. Kakazei
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Chumak, AV
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Serga, AA
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Hillebrands, B
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Vasyuchka, VI
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Journal
Vol. 51 No. 464001
ISSN: 0022-3727
Other information
Authenticus ID: P-00P-DDJ
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.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 7
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