Interplay of Magnetization Dynamics with a Microwave Waveguide at Cryogenic Temperatures

Golovchanskiy, I. A.; Abramov, N. N.; Pfirrmann, Marco; Piskor, Tomislav; Voss, Jan Nicolas; Baranov, D. S.; Hovhannisyan, Razmik A.; Stolyarov, V. S.; Dubs, Carsten; Golubov, A. A.; Ryazanov, V. V.; Ustinov, A. V.; Weides, Martin

doi:10.1103/physrevapplied.11.044076

Cited by 16 publications

(15 citation statements)

References 65 publications

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“…(i) The effect of the vortex phase should hold for S-F-I -S structure (S3 sample). (ii) Presence of the vortex phase that is induced by the external magnetic field should, in the first place, lead to hysteresis in the absorption spectrum due to pinning [30]. (ii) The density of a vortex phase that is induced by the external field is expected to be field dependent leading to field dependence of hypothetical vortex-phase-induced anisotropies.…”

Section: Discussion: Possible Origin Of Proximity-induced Anisotmentioning

confidence: 99%

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: 99%

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

et al. 2020

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“…Since the recent emergence of this hybrid particle, three different models, in particular, have helped to unravel the physics of CMPs over the last years: first, the picture of two coupled oscillators, which is the most intuitive one; the underlying physics, however, is only revealed from an electromagnetic viewpoint, which is the second model and shows a phase correlation between cavity and magnon excitation [9]; and finally, the quantum description of the CMP, which has, for instance, given the theoretical framework for a coupling of magnons to a superconducting qubit [10,11]. Many spectroscopic experiments have led to new insights about loss channels [3,12,13], their temperature dependence [14][15][16], and to the observation of level attraction [17][18][19]. These spectroscopic measurements, however, are performed under continuous driving, and while they have yielded great physical insight into these hybrid systems, flexible and universal information processing requires the manipulation of such physical * tim.wolz@kit.edu † martin.weides@glasgow.ac.uk states on demand and on nanosecond timescales.…”

Section: Introductionmentioning

confidence: 99%

Introducing coherent time control to cavity magnon-polariton modes

et al. 2020

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By connecting light to magnetism, cavity-magnon-polaritons (CMPs) can build links from quantum computation to spintronics. As a consequence, CMP-based information processing devices have thrived over the last five years, but almost exclusively been investigated with single-tone spectroscopy. However, universal computing applications will require a dynamic control of the CMP on demand and within nanoseconds. In this work, we perform fast manipulations of the different CMP modes with independent but coherent pulses to the cavity and magnon system. We change the state of the CMP from the energy exchanging beat mode to its normal modes and further demonstrate two fundamental examples of coherent manipulation: First, a dynamic control over the appearance of magnon-Rabi oscillations, i.e., energy exchange, and second, a complete energy extraction by applying an anti-phase drive to the magnon. Our results show a promising approach to control different building blocks for a quantum internet and pave the way for further magnon-based quantum computing research.

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“…By guiding magnetic flux quanta at a small tilt angle with respect to a Co nanostrip array, about 5 km/s vortex velocities have been achieved [ 116 ] providing access to studying Cherenkov-like generation of acoustic [ 117 ] and spin [ 118 ] waves. We anticipate that 3D FEBID structures will also find applications in the rapidly developing field of magnon fluxonics [ 119 , 120 , 121 , 122 ], addressing the interplay of superconductivity and spin-wave physics. In addition, the suitability of FEBID for the fabrication of 3D leads should enable magneto-resistance measurements in both in-plane and out-of-plane current geometries [ 123 , 124 , 125 ].…”

Section: Febid Nanostructures For 3d Nanomagnetismmentioning

confidence: 99%

Writing 3D Nanomagnets Using Focused Electron Beams

et al. 2020

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Focused electron beam induced deposition (FEBID) is a direct-write nanofabrication technique able to pattern three-dimensional magnetic nanostructures at resolutions comparable to the characteristic magnetic length scales. FEBID is thus a powerful tool for 3D nanomagnetism which enables unique fundamental studies involving complex 3D geometries, as well as nano-prototyping and specialized applications compatible with low throughputs. In this focused review, we discuss recent developments of this technique for applications in 3D nanomagnetism, namely the substantial progress on FEBID computational methods, and new routes followed to tune the magnetic properties of ferromagnetic FEBID materials. We also review a selection of recent works involving FEBID 3D nanostructures in areas such as scanning probe microscopy sensing, magnetic frustration phenomena, curvilinear magnetism, magnonics and fluxonics, offering a wide perspective of the important role FEBID is likely to have in the coming years in the study of new phenomena involving 3D magnetic nanostructures.

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Interplay of Magnetization Dynamics with a Microwave Waveguide at Cryogenic Temperatures

Cited by 16 publications

References 65 publications

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

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

Introducing coherent time control to cavity magnon-polariton modes

Writing 3D Nanomagnets Using Focused Electron Beams

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