Hot spin-wave resonators and scatterers

Kolokoltsev, Oleg; Qureshi, Naser; Mejía-Uriarte, E.V.; Ordóñez‐Romero, César L.

doi:10.1063/1.4730927

Cited by 23 publications

(15 citation statements)

References 13 publications

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“…However, it is clear that the scope of the concept is far broader. Indeed, the graded magnonic index can be created through application of external non-uniform stimuli, ranging from the magnetic field due to the electrical currents [82] or magnetic charges [83] through to electric field, spin currents [85] and thermal gradients, including those created optically [25,87,88]. An exciting extension of the concept is that of non-stationary, dynamically controlled graded-index landscapes [89,90].…”

Section: Discussionmentioning

confidence: 99%

Graded-index magnonics

Davies¹,

Kruglyak²

2015

Low Temperature Physics

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The wave solutions of the Landau-Lifshitz equation (spin waves) are characterized by some of the most complex and peculiar dispersion relations among all waves. For example, the spin-wave ("magnonic") dispersion can range from the parabolic law (typical for a quantum-mechanical electron) at short wavelengths to the nonanalytical linear type (typical for light and acoustic phonons) at long wavelengths. Moreover, the longwavelength magnonic dispersion has a gap and is inherently anisotropic, being naturally negative for a range of relative orientations between the effective field and the spin-wave vector. Nonuniformities in the effective field and magnetization configurations enable the guiding and steering of spin waves in a deliberate manner and therefore represent landscapes of graded refractive index (graded magnonic index). By analogy to the fields of graded-index photonics and transformation optics, the studies of spin waves in graded magnonic landscapes can be united under the umbrella of the graded-index magnonics theme and are reviewed here with focus on the challenges and opportunities ahead of this exciting research direction.

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Section: Discussionmentioning

confidence: 99%

Graded-index magnonics

Davies¹,

Kruglyak²

2015

Low Temperature Physics

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“…Accordingly, there is growing interest in alternative means; techniques have been developed, for example, to control magnon systems via electric-fields in ferrite-ferroelectric stacks [91,92], multiferroic materials such as BiFeO 3 [93], and magnetic thin films with voltage-controllable anisotropies [94]. The emerging field of spin caloritronics [95] which is concerned with the interplay between heat currents and spin angular momentum transport also promises to make an important contribution to this area [96,97].…”

Section: The Control and Manipulation Of Magnon Currentsmentioning

confidence: 99%

Magnon Spintronics

Karenowska

Chumak

Serga

et al. 2015

Handbook of Spintronics

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Presented here is an introduction to magnon spintronics, the emerging field of research concerned with structures and devices which involve the interconversion between electronic spin currents (spin currents carried by electrons) and magnon currents (spin angular momentum fluxes which do not involve the motion of charged carriers). Aimed at the nonexpert reader, the text reviews fundamental and applied aspects of magnonics and examines how the study of the interplay between magnonic and electronic spin transport both shines a light on new physics, and opens doors to new technologies.

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“…Usually, this electrodynamical coupling is considered to be constant, however, as shown in this work, it can suffer significant variations, depending on the temperature of the ferromagnetic material. The temperature of the sample can change due to 10 spin wave dissipation, from 1 to 10 o C [4,5] or up to 100-300 o C because of external heating used to control the spin wave propagation [6,7]. Recently, the typical electrodynamical and magneto-optical methods for spin wave detection/excitation were enriched with the spin transfer torque (STT) [8,9,10] in Pt/magnet thin film structures caused by electrical or thermal spin currents 15 [11,12,13,14,15].…”

Section: Introductionmentioning

confidence: 99%

Thermally controlled confinement of spin wave field in a magnonic YIG waveguide

Borys

Kolokoltsev

Gómez-Arista

et al. 2020

Journal of Magnetism and Magnetic Materials

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Methods for detecting spin waves rely on electrodynamical coupling between the spin wave dipolar field and an inductive probe. While this coupling is usually treated as constant, in this work, we experimentally and theoretically show that it is indeed temperature dependent. By measuring the spin wave magnetic field as a function of temperature of, and distance to the sample, we demonstrate that there is both a longitudinal and transversal confinement of the field near the YIG-Air interface. Our results are relevant for spin wave detection, in particular in the field of spin wave caloritronics.

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Hot spin-wave resonators and scatterers

Cited by 23 publications

References 13 publications

Graded-index magnonics

Graded-index magnonics

Magnon Spintronics

Thermally controlled confinement of spin wave field in a magnonic YIG waveguide

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