Nano-optics with spin waves at microwave frequencies

Demidov, V. E.; Demokritov, S. O.; Rott, Karsten; Krzysteczko, Patryk; Reiss, Guenter

doi:10.1063/1.2945000

Cited by 128 publications

(97 citation statements)

References 11 publications

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“…As demonstrated in Ref. 21, spin waves can be guided into beams by virtue of the strong nonhomogeneity of the internal field. The beams in the well have different dispersion relation from those in the barrier, as it will be shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…the amplitude and phase 3 (the latter is frequency-and wavenumber-dependent) of spin waves, and many available intrinsic attributes specific to waves [17][18][19][20] such as interference. 17,18 Spin-wave-based devices 3-7 also possess some advantages over light-wave-based ones as far as the microwave-frequency band of signals is concerned, e.g., the wavelength of spin waves is generally much smaller than that of light waves at the same frequency, 21 and the characteristics of spin waves are easier to manipulate by an external object, e.g. magnetic field 22 or electric current.…”

Section: Introductionmentioning

confidence: 99%

“…29,30 Demidov and coworkers performed systematic studies on excitation, propagation, and modulation of the DE spin waves in a transversely-magnetized waveguide. 21,24,[31][32][33][34][35][36] They achieved spin-wave beam splitting, self-focusing, frequency conversion, and wavelength transformation by making use of the wave characteristics (i.e. dispersion, diffraction, interference etc.)…”

Section: Introductionmentioning

confidence: 99%

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Engineering spin-wave channels in submicrometer magnonic waveguides

Xing

Wang

2013

AIP Advances

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Based on micromagnetic simulations and model calculations, we demonstrate that degenerate well and barrier magnon modes can exist concurrently in a single magnetic waveguide magnetized perpendicularly to the long axis in a broad frequency band, corresponding to copropagating edge and centre spin waves, respectively. The dispersion relations of these magnon modes clearly show that the edge and centre modes possess much different wave characteristics. By tailoring the antenna size, the edge mode can be selectively activated. If the antenna is sufficiently narrow, both the edge and centre modes are excited with considerable efficiency and propagate along the waveguide. By roughening the lateral boundary of the waveguide, the characteristics of the relevant channel can be easily engineered. Moreover, the coupling of the edge and centre modes can be conveniently controlled by scaling the width of the waveguide. For a wide waveguide with a narrow antenna, the edge and centre modes travel relatively independently in spatially-separate channels, whereas for a narrow strip, these modes strongly superpose in space. These discoveries might find potential applications in emerging magnonic devices

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Engineering spin-wave channels in submicrometer magnonic waveguides

Xing

Wang

2013

AIP Advances

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“…Transducers having a characteristic width of 2 − 5 micron were used in experiments on traveling spin waves reported in [32][33][34][35][36][37]. These correspond to wavenumbers k max = 10 4 − 3 · 10 4 rad/cm.…”

Section: Conclusion: Comparison Of Different Measurement Techniquesmentioning

confidence: 99%

Magnetization pinning at a Py/Co interface measured using broadband inductive magnetometry

Kennewell¹,

Kostylev²,

Ross³

et al. 2010

Journal of Applied Physics

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Broadband FMR responses for metallic single-layer and bi-layer magnetic films with total thicknesses smaller than the microwave magnetic skin depth have been studied. Two different types of microwave transducers were used to excite and detect magnetization precession: a narrow coplanar waveguide and a wide microstrip line. Both transducers show efficient excitation of higher-order standing spin wave modes. The ratio of amplitudes of the first standing spin wave to the fundamental resonant mode is independent of frequency for single films. In contrast, we find a strong variation of the amplitudes with frequency for bi-layers and the ratio is strongly dependent on the ordering of layers with respect to a stripline transducer. Most importantly, cavity FMR measurements on the same samples show considerably weaker amplitudes for the standing spin waves. All experimental data are consistent with expected effects due to screening by eddy currents in films with thicknesses below the microwave magnetic skin depth. Finally, conditions for observing eddy current effects in different types of experiments are critically examined.

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“…A comparison between the dynamic behavior of a rectangular ring with sharp corners and a circular ring is useful in providing model structures to study spin wave confinement and the effect of shape anisotropy on dynamic behavior of ring arrays. Furthermore, an investigation of their packing density is important in designing compact spin wave guides [39] and tunable magnonic filters [6].…”

Section: Introductionmentioning

confidence: 99%

Comparative study of the ferromagnetic resonance behavior of coupled rectangular and circular Ni80Fe20rings

2014

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A systematic investigation of the dynamic behavior of Ni 80 Fe 20 ring arrays using broadband ferromagnetic resonance spectroscopy as a function of inter-ring spacing and ring thickness is presented. Four distinct resonance modes were found for rectangular rings compared to the two modes seen in circular rings of identical width due to the presence of sharp corners and nonuniform demagnetization field distribution. The resonance peaks were sensitive to the inter-ring spacing and the ring thickness due to magnetostatic coupling. Micromagnetic simulations and analytical calculations are compared with the experiment results.

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Nano-optics with spin waves at microwave frequencies

Cited by 128 publications

References 11 publications

Engineering spin-wave channels in submicrometer magnonic waveguides

Engineering spin-wave channels in submicrometer magnonic waveguides

Magnetization pinning at a Py/Co interface measured using broadband inductive magnetometry

Comparative study of the ferromagnetic resonance behavior of coupled rectangular and circular Ni80Fe20rings

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