Spin wave spectra in perpendicularly magnetized permalloy rings

Zhou, Xue; Ding, Jun; Kostylev, Mikhail; Adeyeye, A. O.

doi:10.1063/1.4916029

Cited by 7 publications

(4 citation statements)

References 24 publications

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“…[5,11,19] Although the ferromagnetic resonance (FMR) spectra of patterned films have been wisely researched, recent studies showed rich spin wave spectra of magnetic disks and rings at different magnetized states. [13,20,21] For example, when the magnetic field was applied in the film plane, the magnetic disks at remanence showed a magnetization transition from onion to vortex state depending on the magnitude of the applied field. [22][23][24] On the other hand, splitting of excitation spectra was observed if the magnetic rings magnetized along the direction of out-of-plane.…”

Section: Introductionmentioning

confidence: 99%

“…[22][23][24] On the other hand, splitting of excitation spectra was observed if the magnetic rings magnetized along the direction of out-of-plane. [21] Furthermore, the resonance spectra of ring arrays are more complex than those of disks because of the unique topological structure of rings. In other words, disks are internally connected but rings are not.…”

Section: Introductionmentioning

confidence: 99%

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Angle-dependent spin wave spectra of permalloy ring arrays

Zhu

et al. 2022

Chinese Phys. B

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We investigated the angle-dependent spin wave spectra of Permalloy ring arrays with the fixed outer diameter and various inner diameters by ferromagnetic resonance spectroscopy and micromagnetic simulation. When the field is obliquely applied to the ring, local resonance mode can be observed in different parts of the rings. And the resonance mode will change to perpendicular spin standing waves if the magnetic field is applied along the perpendicular direction. The simulation results demonstrated this evolution and implied more resonance modes that maybe exist. And the mathematical fitting results based on the Kittel equation further proved the existence of local resonance mode.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Angle-dependent spin wave spectra of permalloy ring arrays

Zhu

et al. 2022

Chinese Phys. B

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“…This explains the extensive investigation of magnetic rings during the last twenty years. However, in previous studies of magnetic dynamics, the main attention was paid to thin rings (with thickness below 50 nm) [28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Engineering spin wave spectra in thick Ni80Fe20 rings by using competition between exchange and dipolar fields

et al. 2021

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Control of the spin wave dynamics in nanomagnetic elements is very important for the realization of a broad range of novel magnonic devices. Here we study experimentally the spin wave resonance in thick ferromagnetic rings (100 nm) using perpendicular ferromagnetic resonance spectroscopy. Different from what was observed for the continuous film of the same thickness, or from rings with similar lateral dimensions but with lower thicknesses, the spectra of thick patterned rings show a nonmonotonic dependence of the mode intensity on the resonance field for a fixed frequency. To explain this effect, the theoretical approach by considering the dependence of the mode profiles on both the radial and axial coordinates was developed. It was demonstrated that such unusual behavior is a result of the competition between exchange and dipolar fields acting at the spin excitations in the structure under study. The calculations are in a good agreement with the experimental results.

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“…Spin wave [1,2], defined as non-uniform precession of magnetic moment in a magnetic medium, has drawn significant attention in the last few decades [3]. Recently, the nano and submicron scale patterned magnetic films have drawn much attention due to being beneficial for understanding the spin configuration, spin wave excitation and quasi-static magnetization reversal mechanisms [4][5][6][7]. Due to the boundary condition, the static spin configurations vary because of the combination of internal field profiles and inter-element interaction, and then the quantized spin wave states can be excited in the microwave frequency region in these patterned magnetic films [8,9].…”

Section: Introductionmentioning

confidence: 99%

Multiple spin waves excitation modes observed in the Py film with antidots-like structure

Feng¹,

Song²,

Pan³

et al. 2018

J. Phys. D: Appl. Phys.

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A 2D antidots-like structure on 27.6 nm permalloy (Py) was fabricated by magnetic sputtering, photolithography and ion beam etching technology. By means of the ferromagnetic resonance (FMR) technique and micromagnetic simulation, we investigate the spin excitation in the antidots-like structure. The experimental results show that multiple resonance peaks were observed above the FMR peak, and the resonance frequencies show an unremarkable variation in the plane of the antidots-like structure. Micromagnetic simulation results verify the experiment results and further reveal the amplitude and phase of the resonance peaks. Remarkably, in this case, a well pronounced quantization spin wave mode can be excited. Meanwhile, based on the change of the phase of the spin wave, the propagate direction of the spin waves can be obtained.

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Spin wave spectra in perpendicularly magnetized permalloy rings

Cited by 7 publications

References 24 publications

Angle-dependent spin wave spectra of permalloy ring arrays

Angle-dependent spin wave spectra of permalloy ring arrays

Engineering spin wave spectra in thick Ni80Fe20 rings by using competition between exchange and dipolar fields

Multiple spin waves excitation modes observed in the Py film with antidots-like structure

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