Fig. 7
From: Towards magnonic devices based on voltage-controlled magnetic anisotropy
Magnonic crystals. a Calculated magnonic dispersion curves for 1D array of square magnetic antidots as shown in top panel (solid lines) and waveguide (WG) without antidots (dashed lines). Yellow horizontal lines represent magnonic band gaps of antidot lattice87. Adapted with the permission from https://doi.org/10.1103/PhysRevB.89.014406. b Dynamic magnonic crystal (MC) created by spatially varying magnetic field95. c Schematic diagram of a voltage-controlled MC. Electric field is applied across periodically arranged stripe-like metal gates and WG to tune interfacial perpendicular magnetic anisotropy (iPMA) of WG97. d Frequency spectra of transmitted spin waves (SWs) and the corresponding dispersion curve for applied electric field \(E = 2{\mathrm{V}}\,{\mathrm{nm}}^{{\mathrm{ - 1}}}\). Band gaps are observed at zone boundaries \(k_x = \pi /P,\,2\pi /P\), where transmission of SWs is significantly reduced. Here, kx is the SW wavevector along x-axis, and P is the spatial periodicity of applied electric field. Reproduced with the permission from https://doi.org/10.1103/PhysRevB.95.134433. e Variation of magnonic band width and band frequency with gate voltage. Reproduced with the permission from https://doi.org/10.1103/PhysRevB.95.134433
