Thin-film*

In magnonics, many researches have been conducted to study spin-waves in a thin film that has a perfect rectangular form. However, it is not always possible to achieve such an ideal rectangular structure depending on patterning techniques. For instance, a V[TCNE]_x~2 thin-film deposited by using a CVD method has taper around its edges. In this presentation, we investigate and report characteristics of dipole interaction induced spin-wave modes in a thin-film of a trapezoidal cross-section. We used a micromagnetic simulation program; MUMAX3[1] to simulate spin-wave spectra and corresponding mode profiles of the thin-film. For material parameters, we referred V[TCNE]_x~2 which is a emerging magnetic material that has low damping and narrow linewidth [2]. Our results provide understanding of how tapered edges influence spin-waves and suggest possible applications of localied edge modes.

[1] Vansteenkiste et al., AIP Adv. 4, 107133 (2014).
[2] N. Zhu, X. Zhang, I. H. Froning, M. E. Flatté, E. Johnston-Halperin, and H. X. Hong, Appl. Phys. Lett. 109, 082402 (2016)