Nonstationary spin waves in a single rectangular permalloy microstrip under uniform magnetic excitation

Pile, Santa; Stienen, Sven; Lenz, K.; Narkowicz, R.; Wintz, Sebastian; Förster, Jens; Mayr, Sina; Buchner, Martin; Weigand, Markus; Ney, V.; Lindner, J.; Ney, A.

doi:10.1103/physrevb.105.094415

Cited by 8 publications

(15 citation statements)

References 52 publications

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“…These modes, contrary to the Kittel-like true edge mode, correspond to standing spin-wave resonances, confined in specific regions of the strip. Indeed, as shown by Pile et al 26 , with decreasing field, these regions of the mode localization shift from the edges towards the center of the strip, where two counter-propagating spin waves form quantized nodes.…”

Section: Resultsmentioning

confidence: 67%

Tailoring crosstalk between localized 1D spin-wave nanochannels using focused ion beams

Iurchuk

Pablo-Navarro

Hula

et al. 2023

Sci Rep

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Abstract1D spin-wave conduits are envisioned as nanoscale components of magnonics-based logic and computing schemes for future generation electronics. À-la-carte methods of versatile control of the local magnetization dynamics in such nanochannels are highly desired for efficient steering of the spin waves in magnonic devices. Here, we present a study of localized dynamical modes in 1-$$\upmu$$ μ m-wide permalloy conduits probed by microresonator ferromagnetic resonance technique. We clearly observe the lowest-energy edge mode in the microstrip after its edges were finely trimmed by means of focused Ne$$^+$$ + ion irradiation. Furthermore, after milling the microstrip along its long axis by focused ion beams, creating consecutively $$\sim$$ ∼ 50 and $$\sim$$ ∼ 100 nm gaps, additional resonances emerge and are attributed to modes localized at the inner edges of the separated strips. To visualize the mode distribution, spatially resolved Brillouin light scattering microscopy was used showing an excellent agreement with the ferromagnetic resonance data and confirming the mode localization at the outer/inner edges of the strips depending on the magnitude of the applied magnetic field. Micromagnetic simulations confirm that the lowest-energy modes are localized within $$\sim$$ ∼ 15-nm-wide regions at the edges of the strips and their frequencies can be tuned in a wide range (up to 5 GHz) by changing the magnetostatic coupling (i.e., spatial separation) between the microstrips.

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Section: Resultsmentioning

confidence: 67%

Tailoring crosstalk between localized 1D spin-wave nanochannels using focused ion beams

Iurchuk

Pablo-Navarro

Hula

et al. 2023

Sci Rep

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“…The x-ray energy was set to the Fe L 3 edge with a nominal energy of 710 eV obtained from an energy scan. Taking the division of the recorded x-ray photon counts by the time-average reveals the dynamic magnetic contrast [24,26,36]. Consecutively the data was normalized to its average intensity followed by a minimum-maximum normalization.…”

Section: Details Of Experiments and Simulationmentioning

confidence: 99%

“…Besides these common techniques to characterize magnetization and its dynamics, time-resolved scanning transmission x-ray microscopy (TR-STXM), offering sub-50 nm spatially resolved and element-specific sampling of gigahertz dynamics up to tens of GHz [21][22][23], has been used to measure uniform and non-uniform dynamic excitations within nano-and microstructured samples [21][22][23][24][25][26][27][28][29][30]. The technique measures dynamic magnetic excitations in the linear regime incorporating the x-ray magnetic circular dichroism effect [31][32][33] as contrast mechanism, enabling a phase resolved sampling of the magnetization dynamics.…”

Section: Introductionmentioning

confidence: 99%

Spatially-resolved dynamic sampling of different phasic magnetic resonances of nanoparticle ensembles in a magnetotactic bacterium Magnetospirillum magnetotacticum

et al. 2023

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Nanoscaled magnetic particle ensembles are promising building blocks for realising magnon based binary logic. Element-specific real-space monitoring of magnetic resonance modes with sampling rates in the GHz regime is imperative for the experimental verification of future complex magnonic devices. Here we present the observation of different phasic magnetic resonance modes using the element-specific technique of Time-Resolved Scanning Transmission X-ray Microscopy (TR-STXM) within a chain of dipolarly coupled Fe3O4 nanoparticles (40-50 nm particle size) inside a single cell of a magnetotactic bacterium \textit{Magnetospirillum Magnetotacticum}. The particles are probed with 25~nm resolution at the Fe L3 X-ray absorption edge in response to a microwave excitation of 4.07 GHz. A plethora of resonance modes is observed within multiple particle segments oscillating in- and out-of-phase, well resembled by micromagnetic simulations.

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“…It was shown that the SW behavior can be affected by different factors, for example temperature [6] or the design of microstructures [7], [8], which in turn can be used as a manipulating mechanism. In the present work, the focus is put on the fundamental understanding of the SW behavior in confined rectangular structures under uniform excitation, depending on the relative positioning of two microstrips [9].…”

Section: Introductionmentioning

confidence: 99%

“…At the same time they offer a very high sensitivity for ferromagnetic resonance (FMR) spectroscopy of small structures in comparison to cavity resonators due to an increased filling factor [11]. Timeresolved scanning transmission x-ray microscopy (TR-STXM) [12], [13] in combination with planar microresonators enables direct, time-dependent imaging of the spatial distribution of the precessing magnetization across nanometer-thin microstrips during FMR excitation in the GHz frequency range with elemental selectivity [9], [14].…”

Section: Introductionmentioning

confidence: 99%

Quantifying the Spin-Wave Asymmetry in Single and Double Rectangular Ni₈₀Fe₂₀ Microstrips by TR-STXM, FMR, and Micromagnetic Simulations

et al. 2023

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The asymmetry of spin-wave patterns in confined rectangular Ni80Fe20 microstrips, both in single and double-strip geometries, is quantified. The results of TR-STXM and micromagnetic simulations are compared. For the TR-STXM measurements and the corresponding simulations the excitation was a uniform microwave field with a fixed frequency of 9.43 GHz, while the external static magnetic field was swept. In the easy axis orientation of the analyzed microstrip, the results show a higher asymmetry for the double microstrip design, indicating an influence of the additional microstrip placed in close proximity to the analyzed one.

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Nonstationary spin waves in a single rectangular permalloy microstrip under uniform magnetic excitation

Cited by 8 publications

References 52 publications

Tailoring crosstalk between localized 1D spin-wave nanochannels using focused ion beams

Tailoring crosstalk between localized 1D spin-wave nanochannels using focused ion beams

Spatially-resolved dynamic sampling of different phasic magnetic resonances of nanoparticle ensembles in a magnetotactic bacterium Magnetospirillum magnetotacticum

Quantifying the Spin-Wave Asymmetry in Single and Double Rectangular Ni₈₀Fe₂₀ Microstrips by TR-STXM, FMR, and Micromagnetic Simulations

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Nonstationary spin waves in a single rectangular permalloy microstrip under uniform magnetic excitation

Cited by 8 publications

References 52 publications

Tailoring crosstalk between localized 1D spin-wave nanochannels using focused ion beams

Tailoring crosstalk between localized 1D spin-wave nanochannels using focused ion beams

Spatially-resolved dynamic sampling of different phasic magnetic resonances of nanoparticle ensembles in a magnetotactic bacterium Magnetospirillum magnetotacticum

Quantifying the Spin-Wave Asymmetry in Single and Double Rectangular Ni80Fe20 Microstrips by TR-STXM, FMR, and Micromagnetic Simulations

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Quantifying the Spin-Wave Asymmetry in Single and Double Rectangular Ni₈₀Fe₂₀ Microstrips by TR-STXM, FMR, and Micromagnetic Simulations