Backscattering Immunity of Dipole-Exchange Magnetostatic Surface Spin Waves

Mohseni, Morteza; Verba, Roman; Brächer, Thomas; Wang, Qi; Bozhko, Dmytro A.; Hillebrands, B.; Pirro, Philipp

doi:10.1103/physrevlett.122.197201

Cited by 60 publications

(60 citation statements)

References 45 publications

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“…The protection is caused by the chirality of the mode profiles of two counterpropagating waves. This phenomenon is predicted for magnetic films of nanoscale thickness analytically and is confirmed by means of micromagnetic simulation [242].…”

Section: Groove-array-based Magnonic Crystalssupporting

confidence: 64%

“…8, a) is dramatically (600 times) higher than that of the surface one (wavevector and the internal field form 90 ∘ angle) [223]. This experimental finding can be related to the protection of magnetostatic surface waves against their backscattering from surface defects [242]. The protection is caused by the chirality of the mode profiles of two counterpropagating waves.…”

Section: Groove-array-based Magnonic Crystalsmentioning

confidence: 83%

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Recent Trends in Microwave Magnetism and Superconductivity

et al. 2019

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We review the development trends in microwave magnetism and superconductivity over the last five decades. The review contains the key results of recent studies related to the promising areas of modern magnetism and applied physics – spintronics, magnonics, magnon caloritronics, physics of magnonic crystals, spin-wave logic, and the development of novel micro- and nano-scale magnetic devices. The main achievements in these fields of physics are summarized and generalized.

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Section: Groove-array-based Magnonic Crystalssupporting

confidence: 64%

Section: Groove-array-based Magnonic Crystalsmentioning

confidence: 83%

Recent Trends in Microwave Magnetism and Superconductivity

et al. 2019

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“…Figure 1a, b shows spatially modulated MCs comprising the longitudinally magnetized periodically structured YIG-film waveguides and attached microstrip antennas serving for inductive excitation and detection of SWs in the GHz frequency range. The magnetization geometry is chosen in a way allowing for the excitation of backward volume magnetostatic spin waves (BVMSWs) 38 having reciprocal propagation characteristics 46 and demonstrating high scattering efficiency in thickness-modulated MCs 47,48 .…”

Section: Resultsmentioning

confidence: 99%

Reflection-less width-modulated magnonic crystal

et al. 2020

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The interest in artificial magnetic media such as magnonic crystals increased substantially in recent years due to their potential applications in information processing at microwave frequencies. The main features of these crystals are the presence of band gaps in the spin-wave spectra, usually formed due to Bragg reflections of spin-waves on the artificially created periodic structures. Here, we study spin-wave propagation in longitudinally magnetized width-and thickness-modulated yttrium iron garnet waveguides by means of Brillouin light scattering and microwave spectroscopy techniques. It is found that the width modulated crystal does not manifest noticeable Bragg reflections, but still demonstrates a pronounced band gap in its transmission characteristic. The phenomenon can be explained by the destructive interference between different frequency-degenerated spin-wave modes excited by the crystal. Such a reflection-less crystal is promising for future design of multi-element magnonic devices.

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“…To exploit the rich phenomenology of spin waves for integrated optically inspired processing, generating coherent spatially engineered wavefronts and controlling the propagation and interference of multiple spin‐wave beams are crucial. In addition, nonreciprocity, arising from the dipolar interactions, nonreciprocal coupling between spin waves and antennas, and the breaking of the top/bottom symmetry of the ferromagnetic films, represents an additional degree of freedom for the realization of devices.…”

mentioning

confidence: 99%

Optically Inspired Nanomagnonics with Nonreciprocal Spin Waves in Synthetic Antiferromagnets

et al. 2020

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Integrated optically inspired wave‐based processing is envisioned to outperform digital architectures in specific tasks, such as image processing and speech recognition. In this view, spin waves represent a promising route due to their nanoscale wavelength in the gigahertz frequency range and rich phenomenology. Here, a versatile, optically inspired platform using spin waves is realized, demonstrating the wavefront engineering, focusing, and robust interference of spin waves with nanoscale wavelength. In particular, magnonic nanoantennas based on tailored spin textures are used for launching spatially shaped coherent wavefronts, diffraction‐limited spin‐wave beams, and generating robust multi‐beam interference patterns, which spatially extend for several times the spin‐wave wavelength. Furthermore, it is shown that intriguing features, such as resilience to back reflection, naturally arise from the spin‐wave nonreciprocity in synthetic antiferromagnets, preserving the high quality of the interference patterns from spurious counterpropagating modes. This work represents a fundamental step toward the realization of nanoscale optically inspired devices based on spin waves.

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Backscattering Immunity of Dipole-Exchange Magnetostatic Surface Spin Waves

Cited by 60 publications

References 45 publications

Recent Trends in Microwave Magnetism and Superconductivity

Recent Trends in Microwave Magnetism and Superconductivity

Reflection-less width-modulated magnonic crystal

Optically Inspired Nanomagnonics with Nonreciprocal Spin Waves in Synthetic Antiferromagnets

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