Ferromagnet/Superconductor Hybrid Magnonic Metamaterials

Golovchanskiy, I. A.; Abramov, N. N.; Stolyarov, V. S.; Джумаев, П. С.; Emelyanova, Olga V.; Golubov, A. A.; Ryazanov, V. V.; Ustinov, A. V.

doi:10.1002/advs.201900435

Cited by 36 publications

(27 citation statements)

References 57 publications

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“…However, this estimation is not required since the following set of unfulfilled conditions points towards irrelevance of the lensing effect in discussed experiments. (i) In the case of the lensing effect the induced H a is not a constant but a field-dependent quantity [18]. (ii) In the case of the lensing effect the induced H a should decrease with increasing thickness of the F layer.…”

Section: Discussion: Possible Origin Of Proximity-induced Anisotmentioning

confidence: 98%

“…A natural initial guess for the origin of the effect of superconducting proximity in S-F-S systems on magnetization dynamics is the Meissner screening of external field, the so-called lensing effect [18,27]. For instance, one could employ fluxometric or magnetometric demagnetizing factors [28,29] of the system for estimation of a hypothetical diamagnetic moment in Nb layers that induces magnetostatic field H a .…”

Section: Discussion: Possible Origin Of Proximity-induced Anisotmentioning

confidence: 99%

“…The excitation field pulse has the maximum frequency f max = 30 GHz, the Gaussian spatial profile with the width at half-maximum of 200 nm, and the amplitude of 0.001 Ms. In simulations, the diamagnetic (Meissner) contribution of S subsystem on magnetization dynamics is accounted via the method of images [17,53] in the case of continuous S layers and via the diamagnetic representation of superconductors [18,19] in the case of finite-size S elements. The effect of the superconducting proximity in S-F-S is represented by a local uniaxial anisotropy field μ 0 H s = 0.07 T that corresponds to the S1 sample [see Fig.…”

Section: Prospects Of the Proximity Effect For Application In Magnmentioning

confidence: 99%

“…Figure 6(b) shows the spectrum of the hybrid magnonic crystal that consists of alternating F and S-F-S sections (see the inset) with the lattice period a = 1 μm, the width of F section 0.5 μm, and the thickness of S layers 120 nm. Calculating this spectrum both the diamagnetic representation of S stripes [18,19] and local S-F-S-induced anisotropy are considered. The spectrum can be characterized as a conventional one: it consist of allowed and forbidden bands, the forbidden bands are opened at Brillouin wave numbers 1/2a.…”

Section: Prospects Of the Proximity Effect For Application In Magnmentioning

confidence: 99%

“…Developments in spin physics have also advanced research in superconducting systems: by hybridizing superconducting and ferromagnetic orders intriguing physics emerges and new device functionality can be achieved, which is inaccessible in conventional systems. Thus, superconducting spintronics [5] can be interaction with a superconducting subsystem [16][17][18]. In contrast to superconducting spintronics, in superconducting magnonics the proximity effect appears to be undesirable due to a possible suppression of fundamental characteristics of superconducting subsystem and consequently, degradation of the magnonic spectrum [19].…”

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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Section: Discussion: Possible Origin Of Proximity-induced Anisotmentioning

confidence: 98%

Section: Discussion: Possible Origin Of Proximity-induced Anisotmentioning

confidence: 99%

Section: Prospects Of the Proximity Effect For Application In Magnmentioning

confidence: 99%

Section: Prospects Of the Proximity Effect For Application In Magnmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures

et al. 2021

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condensed matter physics, including cell membranes, [1] nematic crystals, [2,3] superfluids, [4] semiconductors, [5][6][7][8] ferromagnets, [9] and superconductors. [10,11] Currently, much attention is paid to strongly correlated electronic systems, for example, ferromagnets and superconductors, as they provide a unique tool to manipulate the topology of coexisting vector and scalar fields, associated with geometries of conventional systems.Until recently, in the case of magnetism, the influence of the geometry on the spin vector fields was addressed primarily by the design of the sample boundaries. This approach naturally brings the shape anisotropy to the system and leads to the formation of specific spin textures, for example, magnetic vortices [12] and antivortices [13] as well as provides control over the dynamics of the topologically nontrivial magnetic solitons. [14][15][16][17][18] This discussion also tackles the state of the art in modern experimental antiferromagnetism, where the design of the sample topography and boundaries allows to control the domain wall states. [19][20][21][22] With the development of novel fabrication techniques allowing to realize complex 3D architectures, not only the boundary effects but also the extrinsic geometrical properties (e.g., local curvatures) can be addressed rigorously for the case of ferromagnets [23][24][25][26][27] as well as superconductors. [28][29][30] The explored effects are directly related to the interplay between the Traditionally, the primary field, where curvature has been at the heart of research, is the theory of general relativity. In recent studies, however, the impact of curvilinear geometry enters various disciplines, ranging from solid-state physics over soft-matter physics, chemistry, and biology to mathematics, giving rise to a plethora of emerging domains such as curvilinear nematics, curvilinear studies of cell biology, curvilinear semiconductors, superfluidity, optics, 2D van der Waals materials, plasmonics, magnetism, and superconductivity. Here, the state of the art is summarized and prospects for future research in curvilinear solid-state systems exhibiting such fundamental cooperative phenomena as ferromagnetism, antiferromagnetism, and superconductivity are outlined. Highlighting the recent developments and current challenges in theory, fabrication, and characterization of curvilinear micro-and nanostructures, special attention is paid to perspective research directions entailing new physics and to their strong application potential. Overall, the perspective is aimed at crossing the boundaries between the magnetism and superconductivity communities and drawing attention to the conceptual aspects of how extension of structures into the third dimension and curvilinear geometry can modify existing and aid launching novel functionalities. In addition, the perspective should stimulate the development and dissemination of research and development oriented techniques to facilitate rapid transitions from laboratory demonstrations to industry-...

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Introduction

Kumar

2022

Magnetic Resonators

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Ferromagnet/Superconductor Hybrid Magnonic Metamaterials

Cited by 36 publications

References 57 publications

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

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

New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures

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