High-intensity Brillouin light scattering by spin waves in a permalloy film under microwave resonance pumping

Stashkevich, A. A.; Djémia, Philippe; Fetisov, Y. K.; Biziere, Nicolas; Fermon, C.

doi:10.1063/1.2815673

Cited by 9 publications

(9 citation statements)

References 26 publications

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“…We note also that efficient excitation of high order modes was previously seen in experiments on a thicker sample in Ref. [37] (see Fig. 5 in that paper).…”

Section: Discussionsupporting

confidence: 80%

“…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%

“…These correspond to wavenumbers k max = 10 4 − 3 · 10 4 rad/cm. Typically, a single-layer 30 − 40 nm-thick Permalloy film was utilised (except for [37], where the film was 200 nm thick). The calculated results shown in Fig.2 are for a 40 nm thick film for comparison.…”

Section: Conclusion: Comparison Of Different Measurement Techniquesmentioning

confidence: 99%

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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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“…We note also that efficient excitation of high order modes was previously seen in experiments on a thicker sample in Ref. [37] (see Fig. 5 in that paper).…”

Section: Discussionsupporting

confidence: 80%

Section: Conclusion: Comparison Of Different Measurement Techniquesmentioning

confidence: 99%

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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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“…Ref. 18) which, as is well known, change significantly the SW spectra. 19 In this paper we report detection of an intermediate thin magnetic sub-layer causing, via the so called dynamic pinning, noticeable changes in the dynamic behavior of the whole structure.…”

Section: Introductionmentioning

confidence: 80%

Magnetization pinning in conducting films demonstrated using broadband ferromagnetic resonance

Kostylev

Stashkevich

Adeyeye

et al. 2010

Journal of Applied Physics

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The broadband microstrip ferromagnetic resonance technique has been applied for detection and characterization of a magnetic inhomogeneity in a film sample. In the case of a 100nm thick Permalloy film an additional magnetically depleted top sub-layer, practically unidentifiable by the conventional ferromagnetic resonance setup, has been detected and characterized. These results have been confirmed by Brillouin light scattering spectroscopy revealing the fact that the optical properties of the additional sub-layer do not differ much from those of the bulk of the film. Subsequent characterization of a large number of other presumably single-layer films with thicknesses in the range 30-100nm using the same ferromagnetic resonance technique also revealed the same effect.

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“…2,[17][18][19]22 It is not unusual that the saturation magnetisation for Py samples differs considerably from the standard value 4M s = 10800 G. Values in the range from 8000 G to the standard value were found by different authors (see, e.g., Refs. [47][48][49]). Also, we note that for d = 10 nm we find  G = 0.0075, which is slightly lower than but very close to the typical value for Py: 0.008.…”

Section: Inmentioning

confidence: 99%

Strong Eddy-Current Shielding of Ferromagnetic Resonance Response in Sub-Skin-Depth-Thick Conducting Magnetic Multilayers

et al. 2014

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Exchange-coupled non-magnetic metal (NM) and ferromagnetic metal (FM) multilayers are crucial for microwave magnonic and spintronic devices. These layered materials usually have total thicknesses smaller than the microwave skin depth. By using a stripline broadband ferromagnetic resonance spectroscopy technique, we experimentally demonstrate that the amplitude of the magnetisation precession in the FM layer is strongly diminished by the shielding effect of microwave (6-12 GHz) eddy currents circulating in the NM capping layers.

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High-intensity Brillouin light scattering by spin waves in a permalloy film under microwave resonance pumping

Cited by 9 publications

References 26 publications

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

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

Magnetization pinning in conducting films demonstrated using broadband ferromagnetic resonance

Strong Eddy-Current Shielding of Ferromagnetic Resonance Response in Sub-Skin-Depth-Thick Conducting Magnetic Multilayers

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