Spin wave resonance in FeNi multilayers

Kordecki, R.; Meckenstock, R.; Pelzl, J.; Becker, Egon; Dumpich, G.; Suran, G.

doi:10.1016/0304-8853(91)90346-c

Cited by 7 publications

(4 citation statements)

References 4 publications

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“…The exchange length in Co and Py is several nanometers, thus in ferromagnetic resonance the sample behaves in this area alloy-like. This can be seen for example in 32 , where spin wave spectra exist at an effective magnetization of FeNi as an alloy-like entity in addition to the individual spin-wave resonance of Fe. Our STXM-FMR measurements of resonance 2 show at the Ni L edge that the resonance can be observed in the whole area of the disc with a darker contrast at the position of the Co stripe/interface, broader than the contrast seen at the Co L edge, since the edge spins of Co are still not aligned along B and thus not in resonance.…”

Section: Resultsmentioning

confidence: 99%

Element-specific visualization of dynamic magnetic coupling in a Co/Py bilayer microstructure

Feggeler

Meckenstock

Spoddig

et al. 2022

Sci Rep

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We present the element-specific and time resolved visualization of uniform ferromagnetic resonance excitations of a Permalloy (Py) disk–Cobalt (Co) stripe bilayer microstructure. The transverse high frequency component of the resonantly excited magnetization is sampled in the ps regime by a combination of ferromagnetic resonance (FMR) and scanning transmission X-ray microscopy (STXM-FMR) recording snapshots of the local magnetization precession of Py and Co with nanometer spatial resolution. The approach allows us to individually image the resonant dynamic response of each element, and we find that angular momentum is transferred from the Py disk to the Co stripe and vice versa at their respective resonances. The integral (cavity) FMR spectrum of our sample shows an unexpected additional third resonance. This resonance is observed in the STXM-FMR experiments as well. Our microscopic findings suggest that it is governed by magnetic exchange between Py and Co, showing for the Co stripe a difference in relative phase of the magnetization due to stray field influence.

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Section: Resultsmentioning

confidence: 99%

Element-specific visualization of dynamic magnetic coupling in a Co/Py bilayer microstructure

Feggeler

Meckenstock

Spoddig

et al. 2022

Sci Rep

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“…Propagation of spin waves in ferromagnetic films with periodically and weakly varied parameters has been studied extensively [8][9][10]. On the other hand the spectra of spin waves in multilayered magnetic structures have also been studied for various wave types (dipole and exchange) for magnetic-non-magnetic, all-magnetic, ferro-and antiferromagnetic lattices (see [11][12][13][14][15][16][17][18][19][20][21] and references therein). In particular, the Green's function formalism was used for description of spin waves spectra in multilayered structures.…”

Section: Introductionmentioning

confidence: 99%

“…Gorobetz et al [17,19] studied spectra in a stack structure with periodically modulated anisotropy. Ferromagnetic resonance and standing spin waves spectra in a multilayered stack consisting of ultrathin Fe and Ni layers were also studied experimentally [13,20,21]. However, the resonance properties of a traveling spin wave in such structure can differ considerably from that of standing spin wave modes.…”

Section: Introductionmentioning

confidence: 99%

Magneto-Photonic and Magnonic Crystals Based on Ferrite Films - New Types of Magnetic Functional Materials

Никитов

Filimonov

Tailhades

2006

Advances in Science and Technology

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A new type of photonic crystals entitled “magnonic crystals (MC)” that exhibit forbidden gaps in the microwave spectrum of magnetostatic spin waves (MSW) are reported. The topography of the MCs that consist of two-dimensional (2-D) etched holes periodic structure in yttrium iron garnet films was studied by atomic force and magnetic force magnetometry. The propagation characteristics of spin waves in such 2-D MCs was measured and analyzed.

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“…The example layered systems to be theoretically studied here are provided by Ni/Fe multilayers, whose experimental investigation, using Brillouin scattering [24][25][26] or ferromagnetic resonance [27][28][29][30], is extensively reported in the literature. The spin wave resonance (SWR) spectra resulting from our computations agree with the ferromagnetic resonance measurements performed by Chambers et al [31].…”

Section: Introductionmentioning

confidence: 99%

Spin-wave mode profiles versus surface/interface conditions in ferromagnetic Fe/Ni layered composites

Krawczyk

Puszkarski

Lévy

et al. 2003

J. Phys.: Condens. Matter

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Spin-wave excitations in ferromagnetic layered composite (AB · · · BA; A and B being different homogeneous ferromagnetic materials) are analysed theoretically, by means of the transfer matrix approach. The properties of multilayer spin-wave mode profiles are discussed in relation to multilayer characteristics, such as the filling fraction and the exchange or magnetization contrast; also, surface spin pinning conditions and dipolar interactions are taken into account. The interface conditions are satisfied by introducing an effective exchange field expressed by interface gradients of the exchange constant and the magnetization. This approach provides an easy way to find frequencies and amplitudes of standing spin waves in the multilayer. The developed theory is applied to interpretation of spin wave resonance (SWR) spectra obtained experimentally by Chambers et al in two systems: a bilayer Fe/Ni and a trilayer Ni/Fe/Ni, in perpendicular (to the multilayer surface) configuration of the applied magnetic field. By fitting the SWR spectra obtained experimentally and those found numerically, the surface anisotropies are estimated on multilayer surfaces; then, the observed resonance lines are identified as associated with bulk, surface or interface modes. The theory can be extended to a general case of any multi-component layered system.

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Spin wave resonance in FeNi multilayers

Cited by 7 publications

References 4 publications

Element-specific visualization of dynamic magnetic coupling in a Co/Py bilayer microstructure

Element-specific visualization of dynamic magnetic coupling in a Co/Py bilayer microstructure

Magneto-Photonic and Magnonic Crystals Based on Ferrite Films - New Types of Magnetic Functional Materials

Spin-wave mode profiles versus surface/interface conditions in ferromagnetic Fe/Ni layered composites

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