Spin waves in meander shaped YIG film: Toward 3D magnonics

Abstract

We report on the experimental observation of a spin wave (SW) propagation in a magnetic film lying on a developed surface—a three-dimensional (3D) magnonic structure. The 3D magnonic structure was fabricated by deposition of a 180 nm thick yttrium iron garnet film on the patterned substrate with a one-dimensional array of 1.5 μm deep grooves with the period of 20 μm using ion beam sputtering. We experimentally explored SW propagation in such a periodic structure for Bragg and Laue geometries. Transmission characteristics showed that for the Bragg geometry, the examined structure works more like a system of coupled resonators that are formed by the flat segments of the 3D structure, whereas for the Laue geometry, the features related to a formation of width SW modes and to the discrete diffraction of the SW were observed.

Spin-wave eigenmodes in direct-write 3D nanovolcanoes

“…1,2 It encompasses investigations of 3D frustrated systems, [3][4][5][6] topology-and curvatureinduced effects in complex-shaped nano-architectures, [7][8][9][10] and the dynamics of spin waves in 3D magnonic systems. [11][12][13][14][15] In magnonics, which is concerned with the operations with data carried by spin waves, magnonic conduits have traditionally been made from 2D structures. [16][17][18][19][20][21] Extension of spin-wave circuits into the third dimension is required for the reduction of footprints of magnonic logic gates, 20 and it allows, e.g., steering of spin-wave beams in gradedindex magnonics.…”

Advances in Magnetics Roadmap on Spin-Wave Computing

“…IV.G1 (a, c), are candidates of such 3D MCs and represent a wide playground to study the emergent properties of spin waves in 3D systems. [259] Recent studies on 3D meander-shaped films based on metallic (CoFeB, NiFe) [212], [256] and dielectric (YIG) [260] materials have demonstrated the ability to control the SWs spectra, allowing for SW propagating along the orthogonal out-of-plane film segments. The magnonic band structures of single CoFeB and bilayer CoFeB/Ta/NiFe meander-shaped films measured by Brillouin light scattering and corroborated by micromagnetic calculations are markedly different, both in observed modes and in their dependences on the wave vector, i. e. whether they are stationary or dispersive in nature.…”

Латеральный Спин-Волновой Транспорт В Системе Неидентичных Магнонно-Кристаллических Микроволноводов

“…При этом путем создания составных структур на основе тонких магнитных пленок удается управлять свойствами СВ при использовании геометрических эффектов [12]. Последние используются для подходов градиентной магноники [13,14] и концепции построения трехмерных магнонных сетей [15,16]. Использование латерального спин-волнового транспорта в магнонных структурах находит применение для реализации режимов пространственно-частотной селекции информационных сигналов, реализующемся, например, в структуре, состоящей из неидентичных МК [17].…”