Observation of Magnonic Band Gaps in Magnonic Crystals with Nopnreciprocal Dispersion Relation

Abstract

An effect of metallization of the magnonic crystal surface on the band gaps formation in the spectra of the surface spin wave (SSW) is studied both theoretically and experimentally. The structures under consideration are one-dimensional magnonic crystals based on yttrium iron garnet with an array of etched grooves with metal screen on the top of the corrugated surface and without it. Due to nonreciprocity of propagation of the SSW the shift of band gap to higher frequency and from the border of the Brillouin zone in presence of conducting overlayer was measured in transmission line experiment. Results of numerical calculations and model analysis are in agreement with experimental data and give further insight into origin of the band gap and properties of the nonreciprocal SSW in metallized magnonic crystals. This gives positive answer to the outstanding question about possibility of detection of magnonic band gaps in the spectra of the spin waves with nonreciprocal dispersion in magnonic crystals and creates potential for new applications and improvements of already existing prototype magnonic devices.

References in corpus (4)

• Scattering of surface and volume spin waves in a magnonic crystal
• Electric-field coupling to spin waves in a centrosymmetric ferrite
• Design and optimization of one-dimensional ferrite-film based magnonic crystals
• Nonreciprocal Dispersion of Spin Waves in Ferromagnetic Thin Films Covered with a Finite-Conductivity Metal

Cited by in corpus (11)

• Magnonic crystals for data processing
• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Flat Bands, Indirect Gaps, and Unconventional Spin-Wave Behavior Induced by a Periodic Dzyaloshinskii-Moriya Interaction
• Spin wave nonreciprocity and magnonic band structure in thin permalloy film induced by dynamical coupling with an array of Ni stripes
• Magnonic band gaps in YIG based magnonic crystals: array of grooves versus array of metallic stripes
• Magnonic crystals - prospective structures for shaping spin waves in nanoscale
• Efficient Gating of Magnons by Proximity Superconductors
• Magnetic properties, spin waves and interaction between spin excitations and 2D electrons in interface layer in Y3Fe5O12 / AlOx / GaAs-heterostructures
• Optical heterodyne imaging of magnetostatic modes in one-dimensional magnonic crystals
• Spin waves in periodic antidot waveguide of complex base
• Chiral Magnonic Resonators: Rediscovering the Basic Magnetic Chirality in Magnonics