Butterfly curves and critical modes for second-order spin-wave instability processes in yttrium iron garnet films

Kaboš, Pavel; Patton, Carl E.; Wiese, G.; Sullins, A. D.; Wright, E. S.; Chen, L.

doi:10.1063/1.363354

Cited by 18 publications

(11 citation statements)

References 21 publications

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“…The wave-number k distribution for the scattered spin waves was sharply peaked around kϭ3 -4ϫ10 4 rad/cm, and shown to evolve from a broad k distribution for cw microwave excitation as found in Ref. 21. These high-k modes had discrete wave-vector directions that were perpendicular to the propagation direction and at angles at about 22°-23°and 45°away from perpendicular.…”

Section: Introductionsupporting

confidence: 52%

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Brillouin light-scattering observation of the nonlinear spin-wave decay in yttrium iron garnet thin films

et al. 2000

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The direct observation of nonlinear spin-wave decay in thin yttrium iron garnet ͑YIG͒ films is reported. The second-order parametric spin waves were excited by a series of nonlinear magnetostatic backward volume wave ͑MSBVW͒ pulses propagated in a microstrip structure at 5 GHz. Brillouin light-scattering techniques were used to detect spin waves in the YIG at a point along the propagation path. Data were obtained as a function of the input pulse duty cycle and peak power level. These data yielded the decay rate eff for the parametric spin waves vs input power P in . This eff was equal to the usual spin-wave relaxation rate at low power, but decreased rapidly with increasing P in . As P in approached the threshold power for complete MSBVW soliton formation at the observation point, eff leveled off to a relatively constant value that was about a factor of 5-10 smaller than the low power value. The initial decrease in eff with power is due to the compensation of the usual spin-wave decay by the simultaneous parametric pumping of the spin waves by Suhl processes. The leveling off in eff at the soliton threshold is due to the spin-wave shedding that is needed to maintain order one eigenmode soliton propagation at high input power levels. These experiments demonstrate the reduction in the spin-wave decay rate with power below the threshold for spin-wave instability. This reduction is a key element in spin-wave instability theory that has never been observed directly. The data also demonstrate the enhanced production of parametric spin waves that accompanies microwave magnetic envelope soliton formation. §

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Section: Introductionsupporting

confidence: 52%

“…For such experiments, the generation of parametric spin waves is well established. 21 The second assumption is that these spin waves that are excited as the MSW pulse passes the point of observation will decay following this passage and exhibit a characteristic decay with time. This decay may be written as…”

Section: Experiments and Relaxation Rate Determinationmentioning

confidence: 99%

Brillouin light-scattering observation of the nonlinear spin-wave decay in yttrium iron garnet thin films

et al. 2000

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“…To investigate the wave vector dependence of nonlinear effects, which is necessary to fully understand FMR at high microwave powers [337], combined BLS and microwave pumping techniques have also been used [300][301][302]. More recently micro focussed BLS has enabled sensitive local probing of micro-and/or nano-structured devices.…”

Section: Detection Of Nonlinear Magnetization Dynamicsmentioning

confidence: 99%

Electrical detection of magnetization dynamics via spin rectification effects

2016

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The purpose of this article is to review the current status of a frontier in dynamic spintronics and contemporary magnetism, in which much progress has been made in the past decade, based on the creation of a variety of micro-and nano-structured devices that enable electrical detection of magnetization dynamics. The primary focus is on the physics of spin rectification effects, which are well suited for studying magnetization dynamics and spin transport in a variety of magnetic materials and spintronic devices. Intended to be intelligible to a broad audience, the paper begins with a pedagogical introduction, comparing the methods of electrical detection of charge and spin dynamics in semiconductors and magnetic materials respectively. After that it provides a comprehensive account of the theoretical study of both the angular dependence and line shape of electrically detected ferromagnetic resonance (FMR), which is summarized in a handbook formate easy to be used for analyzing experimental data. We then review and examine the similarity and differences of various spin rectification effects found in ferromagnetic films, magnetic bilayers and magnetic tunnel junctions, including a discussion of how to properly distinguish spin rectification from the spin pumping/inverse spin Hall effect generated voltage. After this we review the broad applications of rectification effects for studying spin waves, nonlinear dynamics, domain wall dynamics, spin current, and microwave imaging. We also discuss spin rectification in ferromagnetic semiconductors. The paper concludes with both historical and future perspectives, by summarizing and comparing three generations of FMR spectroscopy which have been developed for studying magnetization dynamics.

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“…Previous applications of the BLS technique to nonlinear spin dynamics in magnetic films have provided a critical background to the present accomplishments. First, Kabos et al [4][5][6] extended the wave vector selective BLS spectrometer concept of Wettling et al [7] and Wilber et al [8] to measure the wave vector distributions of parametric spin waves. Second, Boyle et al [9] and Bauer et al [10] studied two dimensional amplitude profiles for linear and nonlinear cw magnetostatic spin waves in YIG films.…”

mentioning

confidence: 99%

Brillouin Light Scattering and Magnon Wave Vector Distributions for Microwave-Magnetic-Envelope Solitons in Yttrium-Iron-Garnet Thin Films

et al. 1998

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Brillouin light scattering has been used to measure wave number k m and wave vector k m angle distributions for 5 GHz magnetostatic backward-volume-wave envelope solitons in yttrium-iron-garnet thin films. For moderate powers, the data revealed spin waves directly associated with the solitons with k m values in the 6300 rad͞cm range. For high powers, the data showed high k m spin waves in the 2500-5000 rad͞cm range with discrete in-plane k m directions at 90 ± and other angles around 90 ± relative to the soliton propagation direction. These high k m spin waves provide the first direct evidence of spin wave shedding associated with solitons at high powers. [S0031-9007(98)06546-6]

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Butterfly curves and critical modes for second-order spin-wave instability processes in yttrium iron garnet films

Cited by 18 publications

References 21 publications

Brillouin light-scattering observation of the nonlinear spin-wave decay in yttrium iron garnet thin films

Brillouin light-scattering observation of the nonlinear spin-wave decay in yttrium iron garnet thin films

Electrical detection of magnetization dynamics via spin rectification effects

Brillouin Light Scattering and Magnon Wave Vector Distributions for Microwave-Magnetic-Envelope Solitons in Yttrium-Iron-Garnet Thin Films

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