Spin wave nonreciprocity and magnonic band structure in thin permalloy film induced by dynamical coupling with an array of Ni stripes

Abstract

An efficient way for the control of spin wave propagation in a magnetic medium is the use of periodic patterns known as magnonic crystals (MCs). However, the fabrication of MCs especially bi-components, with periodicity on nanoscale, is a challenging task due to the requirement for sharp interfaces. An alternative method to circumvent this problem is to use homogeneous ferromagnetic film with modified periodically surrounding. The structure is also suitable for exploiting nonreciprocal properties of the surface spin waves. In this work, we demonstrate that the magnonic band structure forms in thin permalloy film due to dynamical magnetostatic coupling with Ni stripes near its surface. We show, that the band gap width can be systematically tuned by the changing interlayer thickness between film and stripes. We show also the effect of nonreciprocity, which is seen at the band gap edge shifted from the Brillouin zone boundary and also in nonreciprocal interaction of propagating spin waves in Py film with the standing spin waves in Ni stripes. Our findings open possibility for further investigation and exploitation of the nonreciprocity and band structure in magnonic devices.

arXiv comment12 pages, 5 figures

References in corpus (9)

• Brillouin light scattering studies of planar metallic magnonic crystals
• Frequency non-reciprocity of surface spin wave in Permalloy thin films
• Scattering of surface and volume spin waves in a magnonic crystal
• Observation of Magnonic Band Gaps in Magnonic Crystals with Nopnreciprocal Dispersion Relation
• Magnonic band gaps in YIG based magnonic crystals: array of grooves versus array of metallic stripes
• Nonreciprocal Dispersion of Spin Waves in Ferromagnetic Thin Films Covered with a Finite-Conductivity Metal
• Collective spin excitations in bi-component magnonic crystals consisting of bi-layer Permalloy/Fe nanowires
• The role of the internal demagnetizing field in a surface-modulated magnonic crystal
• Spin-wave modes and band structure of rectangular CoFeB antidot lattices

Cited by in corpus (21)

• Excitation of unidirectional exchange spin waves by a nanoscale magnetic grating
• Spin pinning and spin-wave dispersion in nanoscopic ferromagnetic waveguides
• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Slow-wave based magnonic diode
• Spin-wave phase inverter upon a single nanodefect
• Efficient Gating of Magnons by Proximity Superconductors
• Magnonic band gap and mode hybridization in continuous Permalloy film induced by vertical coupling with an array of Permalloy ellipses
• Driving magnetization dynamics in an on-demand magnonic crystal by magneto-elastic interaction
• Magnonic band structure in vertical meander-shaped CoFeB thin films
• Essential model parameters for nonreciprocal magnons in multisublattice systems
• Co- and contra-directional vertical coupling between ferromagnetic layers with grating for short-wavelength spin wave generation
• Magnon confinement in an all-on-chip YIG cavity resonator using hybrid YIG/Py magnon barriers
• Backward magnetostatic surface spin waves in exchange coupled Co/FeNi bilayers
• Electromagnetic Proximity Effect: Superconducting Magnonics and Beyond
• Spin-wave directional anisotropies in antiferromagnetic Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$
• Magnetization statics and dynamics in (Ir/Co/Pt)${}_6$ multilayers with Dzyaloshinskii-Moriya interaction
• Temperature dependence of spin pinning and spin-wave dispersion in nanoscopic ferromagnetic waveguides
• Transition magnon modes in thin ferromagnetic nanogratings
• 1D YIG hole-based magnonic nanocrystal
• Ubiquity of the spin-orbit induced magnon nonreciprocity in ultrathin ferromagnets
• Chiral Magnonic Resonators: Rediscovering the Basic Magnetic Chirality in Magnonics