Control of propagation characteristics of spin wave pulses via elastic and thermal effects

Gómez-Arista, Iván; Kolokoltsev, Oleg; Acevedo, A.; Qureshi, Naser; Ordóñez‐Romero, César L.

doi:10.1016/j.jmmm.2016.12.117

Cited by 4 publications

(1 citation statement)

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“…The thermal influence is expected to be especially pronounced for devices utilizing thin epitaxial films of yttrium iron garnet (YIG, Y 3 Fe 5 O 12 ) as a host material for fabrication of magnonic circuits. Alongside with ultra-low spin-wave damping, this magnetic insulator has the relatively small saturation magnetization 4πM s = 1750 G at room temperature combined with a high sensitivity to local temperature variations [29][30][31][32][33]. However, an impact of temper ature effects on the YIG-based MC has not been explored so far.…”

Section: Introductionmentioning

confidence: 99%

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

Langner¹,

Bozhko²,

Bunyaev³

et al. 2018

J. Phys. D: Appl. Phys.

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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 1D 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.

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