Magnonic crystals with complex geometry

De, Anulekha; Dutta, Koustuv; Mondal, Sucheta; Barman, Saswati; Otani, Y.; Barman, Anjan

doi:10.1103/physrevb.103.064402

Cited by 9 publications

(7 citation statements)

References 55 publications

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“…[ 7 ] Meanwhile, the ordered domain walls can also be expected to nucleate in MCs, ascribed to the patterned distribution of demagnetization fields. [ 28,36 ]…”

Section: Resultsmentioning

confidence: 99%

“…[7] Meanwhile, the ordered domain walls can also be expected to nucleate in MCs, ascribed to the patterned distribution of demagnetization fields. [28,36] Thus, we prepare patterned magnetic films (MCs with antidot lattices) by electron beam lithography (EBL) and the liftoff process, where the process of deposition is consistent with the preparation of continuous magnetic films. Different from continuous magnetic films that exhibit randomly distributed magnetic domain walls, MCs with regular micro-or nano-patterns present ordered magnetic textures due to periodic geometrical restrictions.…”

Section: Resultsmentioning

confidence: 99%

“…The high-order resonant modes might not be excited in these MCs due to microscale patterns, which have been realized in antidot lattices with nanoscale patterns. [28,36]…”

Section: (3 Of 10)mentioning

confidence: 99%

“…[ 21,31 ] Consequently, these MCs with ordered magnetic textures exhibit abundant collective excitation modes that determine the ferromagnetic resonances (FMRs) of the magnetic system. [ 27,28,32,33 ] Compared to dot lattices with magnetic vortices, [ 34,35 ] antidot lattices with non‐magnetic holes periodically present the resonant frequency of gigahertz, [ 36 ] which is significant for the high‐frequency and wide‐band applications, such as electromagnetic compatibility in 5th‐generation wireless communications. [ 37 ] The resonant spectra of antidot lattices can also be manipulated by varying the lattice constant [ 38 ] and symmetry [ 39 ] of antidot lattices, as well as the direction of external magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

“…[ 37 ] The resonant spectra of antidot lattices can also be manipulated by varying the lattice constant [ 38 ] and symmetry [ 39 ] of antidot lattices, as well as the direction of external magnetic fields. [ 36 ] However, the urgent demand is to uncover the magnetic textures of MCs by the direct‐observation technique, which can clarify the underlying mechanisms of the complex FMRs and deserve intensive studies on establishing the intrinsic connections between spin dynamics and magnetic textures.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Reconfigurable Ferromagnetic Resonances by Engineering Inhomogeneous Magnetic Textures in Artificial Magnonic Crystals

Zhao

et al. 2022

Adv Funct Materials

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Advanced microfabrication gives rise to an extra degree of freedom for controlling magnetic textures, which determine the spin dynamics of thin‐film magnets for various spintronic devices. However, the intuitive understanding of complicated ferromagnetic resonances (FMRs) is still challenging for lacking directly observed evolution of inhomogeneous magnetic textures. This study demonstrates the reconfigurable FMRs by introducing artificial patterns of antidot lattices (namely magnonic crystals), mediated by the engineering of inhomogeneous magnetic textures. Ordered walls are observed directly in such a magnetic film using in situ Lorentz transmission electron microscopy. By applying in‐plane external magnetic fields, arc‐shaped domain walls can be nucleated along the edge of patterns, inducing the splitting of FMRs from a single peak to two branches (marked by low‐frequency and high‐frequency branches, respectively). Complementary micromagnetic simulations reconstruct the inhomogeneous magnetic textures and splitting of FMRs. It is indicated that the low‐frequency branch ascribes to the confined mode excited by arc‐shaped domain walls, and the high‐frequency one originates from the quasi‐uniform mode generated by in‐plane magnetization between arc‐shaped domain walls. These results offer new opportunities for designing patterned magnonic devices and understanding the unique phenomenon of spin dynamics.

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“…[ 7 ] Meanwhile, the ordered domain walls can also be expected to nucleate in MCs, ascribed to the patterned distribution of demagnetization fields. [ 28,36 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The high-order resonant modes might not be excited in these MCs due to microscale patterns, which have been realized in antidot lattices with nanoscale patterns. [28,36]…”

Section: (3 Of 10)mentioning

confidence: 99%