Characteristics of YBaCuO magnetic shields

Hurben, M.J.; Symko, O. G.; Yeh, W. J.; Kulkarni, Sudhir A.; Novák, M.

doi:10.1109/20.133562

Cited by 17 publications

(9 citation statements)

References 6 publications

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“…Our results are plotted in Figure 4. The observed dispersion relation is consistent with the theory of Damon-Eshbach waves in this wavevector regime, where the relative quadratic contribution of the exchange interaction is small [22]. At the external field magnitude of 0.13 T, we obtain a maximum spin-wave group velocity of 5250 km/s, monotonically decreasing with increasing wavevector up to the experimental limit.…”

Section: Resultssupporting

confidence: 88%

Co25Fe75Thin Films with Ultralow Total Damping of Ferromagnetic Resonance

2019

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We measure the dynamic properties of Co25Fe75 thin films grown by dc magnetron sputtering. Using ferromagnetic resonance spectroscopy, we demonstrate an ultralow total damping parameter in the out-of-plane configuration of < 0.0013, whereas for the in-plane configuration we find a minimum total damping of < 0.0020. In both cases, we observe low inhomogeneous linewidth broadening in macroscopic films. We observe a minimum full-width half-maximum linewidth of 1 mT at 10 GHz resonance frequency for a 12 nm thick film. We characterize the morphology and structure of these films as a function of seed layer combinations and find large variation of the qualitative behavior of the in-plane linewidth vs. resonance frequency. Finally, we use wavevector-dependent Brillouin light scattering spectroscopy to characterize the spin-wave dispersion at wave vectors up to 23 µm -1 .

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Section: Resultssupporting

confidence: 88%

Co25Fe75Thin Films with Ultralow Total Damping of Ferromagnetic Resonance

2019

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“…The DE modes are the most likely to be excited by a microstrip antenna in the Damon-Eshbach geometry 8 and show unusual features such as nonreciprocal propagation 9 . However, in a film of finite thickness, BVMSWs are not restricted to the case k M and can exist with any (in-plane) wavevector k; in particular, perpendicularly propagating volume modes also exist and have frequencies below the DE branch 3,10 . The BVMSW modes are, in fact, the dominant modes in optomagnetic 11,12 experiments as in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…Because of the nontrivial profile of the mode, the true dispersion relation of the volume modes can in principle be found only numerically 1,3 . To our knowledge, the closed-form expressions that have been derived, while useful, rely on either an effectively two-dimensional approach [13][14][15][16] or on an artificial decoupling of Fourier components 17 .…”

Section: Introductionmentioning

confidence: 99%

“…To our knowledge, the closed-form expressions that have been derived, while useful, rely on either an effectively two-dimensional approach [13][14][15][16] or on an artificial decoupling of Fourier components 17 . References [2] and [8], on the other hand, provide an analytical treatment that is in principle exact but which in practice requires the numerical solution of a set of coupled transcendental equations.…”

Section: Introductionmentioning

confidence: 99%

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Two-dimensional dispersion of magnetostatic volume spin waves

Buijnsters¹,

Tilburg

Fasolino

et al. 2018

J. Phys.: Condens. Matter

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Owing to the dipolar (magnetostatic) interaction, long-wavelength spin waves in in-plane magnetized films show an unusual dispersion behavior, which can be mathematically described by the model of [Formula: see text] and [Formula: see text] and refinements thereof. However, solving the two-dimensional dispersion [Formula: see text] requires the evaluation of a set of coupled transcendental equations and one has to rely on numerics. In this work, we present a systematic perturbative analysis of the spin wave model. An expansion in the in-plane wavevector [Formula: see text] allows us to obtain explicit closed-form expressions for the dispersion relation and mode profiles in various asymptotic regimes. Moreover, we derive a very accurate semi-analytical expression for the dispersion relation of the lowest-frequency mode that is straightforward to evaluate.

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“…The interplay between a magnetic domain wall (DW) and spin waves has been investigated, expanding the use of a DW for the various purposes in magnonics, such as a channel for spin waves and magnonic crystals [12][13][14][15][16][17] . The width of a DW, typically in the order of lattice spacing, is less than the wavelength of magnetostatic spin waves which is sub-to several micrometers in thin films 18 . Therefore a DW acts for spin waves as an abruput magnetic boundary.…”

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confidence: 99%

Snell's law for spin waves at a 90° magnetic domain wall

Hioki

Tsuboi

Johansen

et al. 2020

Applied Physics Letters

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We report experimental observation of the refraction and reflection of propagating magnetostatic spin waves crossing a 90-degree domain wall (DW) in terms of time-resolved magneto-optical imaging. Due to the magnetization rotation across the 90-degree DW, the dispersion relation of magnetostatic spin waves rotates by 90 degrees, which results in the change in the propagation dynamics of spin waves in both sides of the DW. We observe the refraction and reflection of magnetosatatc spin waves at the 90-degree DW, and reveal their characteristics, such as negative refraction. The incident-angle dependence of the refraction angle is explained by the wavenumber conservation along the DW, same as the case of Snell's law for a light. arXiv:1911.10659v1 [cond-mat.other]

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Characteristics of YBaCuO magnetic shields

Cited by 17 publications

References 6 publications

Co25Fe75Thin Films with Ultralow Total Damping of Ferromagnetic Resonance

Co25Fe75Thin Films with Ultralow Total Damping of Ferromagnetic Resonance

Two-dimensional dispersion of magnetostatic volume spin waves

Snell's law for spin waves at a 90° magnetic domain wall

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