Effect of Meissner Screening and Trapped Magnetic Flux on Magnetization Dynamics in Thick 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mi>Nb</mml:mi><mml:mo>/</mml:mo><mml:msub><mml:mi>Ni</mml:mi><mml:mn>80</mml:mn></mml:msub><mml:msub><mml:mi>Fe</mml:mi><mml:mn>20</mml:mn></mml:msub><mml:mo>/</mml:mo><mml:mi>Nb</mml:mi></mml:math>
 Trilayers

Jeon, Kun-Rok; Ciccarelli, Chiara; Kurebayashi, Hidekazu; Cohen, L. F.; Montiel, X.; Eschrig, Matthias; Wagner, Thomas; Komori, Sachio; Srivastava, Anand; Robinson, Jason W. A.; Blamire, M. G.

doi:10.1103/physrevapplied.11.014061

Cited by 62 publications

(70 citation statements)

References 44 publications

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“…This sample is referred to as S1. Thickness of the Py layer is selected for a direct comparison of the obtained results with previous research studies [20,21]. Fig.…”

Section: Methodsmentioning

confidence: 98%

“…In Refs. [20] and [21] a drastic increase of the ferromagnetic resonance frequency has been observed in superconductor-ferromagnet-superconductor three layers in the presence of superconducting proximity between superconducting and ferromagnetic layers. The origin of the phenomenon remains unclear.…”

Section: Introductionmentioning

confidence: 97%

“…The origin of the phenomenon remains unclear. Possible explanations that have been proposed so far are attributed to incorporation of the spin-triplet superconducting pairing mechanism [20] or to an interplay of magnetization dynamics with the vortex and Meissner state of superconducting layers [21]. No convincing explanation has been provided so far.…”

Section: Introductionmentioning

confidence: 99%

“…For a complete picture, we also suggest to review previous research studies on similar systems (see Refs. [20][21][22]). Section IV is devoted to discussion of experimental results where we state that the effect of superconducting proximity in S-F-S systems can not be explained employing concepts of the superconducting Meissner screening or of the vortex phase.…”

Section: Introductionmentioning

confidence: 99%

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Magnetization Dynamics in Proximity-Coupled Superconductor-Ferromagnet-Superconductor Multilayers

et al. 2020

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In this work, magnetization dynamics is studied in superconductor-ferromagnet-superconductor threelayered films in a wide frequency, field, and temperature ranges using the broad-band ferromagnetic resonance measurement technique. It is shown that in the presence of both superconducting layers and of superconducting proximity at both superconductor-ferromagnet interfaces a massive shift of the ferromagnetic resonance to higher frequencies emerges. The phenomenon is robust and essentially long-range: it has been observed for a set of samples with the thickness of ferromagnetic layer in the range from tens up to hundreds of nanometers. The resonance frequency shift is characterized by proximity-induced magnetic anisotropies: by the positive in-plane uniaxial anisotropy and by the drop of magnetization. The shift and the corresponding uniaxial anisotropy grow with the thickness of the ferromagnetic layer. For instance, the anisotropy reaches 0.27 T in experiment for a sample with a 350-nm-thick ferromagnetic layer, and about 0.4 T in predictions, which makes it a ferromagnetic film structure with the highest anisotropy and the highest natural resonance frequency ever reported. Various scenarios for the superconductivityinduced magnetic anisotropy are discussed. As a result, the origin of the phenomenon remains unclear. Application of the proximity-induced anisotropies in superconducting magnonics is proposed as a way for manipulations with a spin-wave spectrum.

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“…This sample is referred to as S1. Thickness of the Py layer is selected for a direct comparison of the obtained results with previous research studies [20,21]. Fig.…”

Section: Methodsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Magnetization Dynamics in Proximity-Coupled Superconductor-Ferromagnet-Superconductor Multilayers

et al. 2020

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“…In such systems charge and (non-collinear) spin transport are closely linked and need to be treated on the same footing. Recently there has also been increased interest to couple superconductors to magnets and find out how superconductivity affects the magnetization dynamics, [5][6][7][8][9][10][11][12][13][14][15] including thermally driven effects [16]. On the other hand, recent work has shown that a combination of magnetic and superconducting systems results to giant thermoelectric effects [17][18][19][20] coupling charge and heat currents.…”

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confidence: 99%

Nonlinear spin torque, pumping, and cooling in superconductor/ferromagnet systems

et al. 2020

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We study the effects of the coupling between magnetization dynamics and the electronic degrees of freedom in a heterostructure of a metallic nanomagnet with dynamic magnetization coupled with a superconductor containing a steady spin-splitting field. We predict how this system exhibits a non-linear spin torque, which can be driven either with a temperature difference or a voltage across the interface. We generalize this notion to arbitrary magnetization precession by deriving a Keldysh action for the interface, describing the coupled charge, heat and spin transport in the presence of a precessing magnetization. We characterize the effect of superconductivity on the precession damping and the anti-damping torques. We also predict the full non-linear characteristic of the Onsager counterparts of the torque, showing up via pumped charge and heat currents. For the latter, we predict a spin-pumping cooling effect, where the magnetization dynamics can cool either the nanomagnet or the superconductor.

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Ferromagnet/Superconductor Hybrid Magnonic Metamaterials

et al. 2019

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In this work, a class of metamaterials is proposed on the basis of ferromagnet/superconductor hybridization for applications in magnonics. These metamaterials comprise of a ferromagnetic magnon medium that is coupled inductively to a superconducting periodic microstructure. Spectroscopy of magnetization dynamics in such hybrid evidences formation of areas in the medium with alternating dispersions for spin wave propagation, which is the basic requirement for the development of metamaterials known as magnonic crystals. The spectrum allows for derivation of the impact of the superconducting structure on the dispersion: it takes place due to a diamagnetic response of superconductors on the external and stray magnetic fields. In addition, the spectrum displays a dependence on the superconducting critical state of the structure: the Meissner and the mixed states of a type II superconductor are distinguished. This dependence hints toward nonlinear response of hybrid metamaterials on the magnetic field. Investigation of the spin wave dispersion in hybrid metamaterials shows formation of allowed and forbidden bands for spin wave propagation. The band structures are governed by the geometry of spin wave propagation: in the backward volume geometry the band structure is conventional, while in the surface geometry the band structure is nonreciprocal and is formed by indirect band gaps.

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Effect of Meissner Screening and Trapped Magnetic Flux on Magnetization Dynamics in Thick Nb/Ni80Fe20/Nb Trilayers

Cited by 62 publications

References 44 publications

Magnetization Dynamics in Proximity-Coupled Superconductor-Ferromagnet-Superconductor Multilayers

Magnetization Dynamics in Proximity-Coupled Superconductor-Ferromagnet-Superconductor Multilayers

Nonlinear spin torque, pumping, and cooling in superconductor/ferromagnet systems

Ferromagnet/Superconductor Hybrid Magnonic Metamaterials

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