Functional magnetic waveguides for magnonics

Haldar, Arabinda; Adeyeye, A. O.

doi:10.1063/5.0061528

Cited by 18 publications

(6 citation statements)

References 133 publications

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“…The uniaxial strain has been used to manipulate the ground states of complex antiferromagnets 43 , 44 , and some evidence has recently been reported for the sensitivity of ferromagnetic magnons at GHz frequencies to epitaxial 45 or bending strain 46 . The extreme stress sensitivity of THz magnons we have discovered in a simple antiferromagnet opens up new opportunities for guiding magnons via strain domains in an otherwise homogeneous material, without resorting to heteroepitaxy and lithography 47 . Magnon conduits and magnonic crystals could then be fashioned from self-assembled strain domain patterns in thin-film structures, which can be readily reconfigured by force microscopy.…”

Section: Discussionmentioning

confidence: 99%

Giant stress response of terahertz magnons in a spin-orbit Mott insulator

et al. 2022

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Magnonic devices operating at terahertz frequencies offer intriguing prospects for high-speed electronics with minimal energy dissipation However, guiding and manipulating terahertz magnons via external parameters present formidable challenges. Here we report the results of magnetic Raman scattering experiments on the antiferromagnetic spin-orbit Mott insulator Sr2IrO4 under uniaxial stress. We find that the energies of zone-center magnons are extremely stress sensitive: lattice strain of 0.1% increases the magnon energy by 40%. The magnon response is symmetric with respect to the sign of the applied stress (tensile or compressive), but depends strongly on its direction in the IrO2 planes. A theory based on coupling of the spin-orbit-entangled iridium magnetic moments to lattice distortions provides a quantitative explanation of the Raman data and a comprehensive framework for the description of magnon-lattice interactions in magnets with strong spin-orbit coupling. The possibility to efficiently manipulate the propagation of terahertz magnons via external stress opens up multifold design options for reconfigurable magnonic devices.

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Section: Discussionmentioning

confidence: 99%

Giant stress response of terahertz magnons in a spin-orbit Mott insulator

et al. 2022

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“…Another key subject of research in magnonics is the transport of information carried by magnons from one place to another [290] . This can be done through two methods.…”

Section: Magnon-polaritons and Magnon Propagationmentioning

confidence: 99%

Terahertz spin dynamics in rare-earth orthoferrites

Kim

Liu

et al. 2022

Photonics Insights

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Recent interest in developing fast spintronic devices and laser-controllable magnetic solids has sparked tremendous experimental and theoretical efforts to understand and manipulate ultrafast dynamics in materials. Studies of spin dynamics in the terahertz (THz) frequency range are particularly important for elucidating microscopic pathways toward novel device functionalities. Here, we review THz phenomena related to spin dynamics in rare-earth orthoferrites, a class of materials promising for antiferromagnetic spintronics. We expand this topic into a description of four key elements. (1) We start by describing THz spectroscopy of spin excitations for probing magnetic phase transitions in thermal equilibrium. While acoustic magnons are useful indicators of spin reorientation transitions, electromagnons that arise from dynamic magnetoelectric couplings serve as a signature of inversion-symmetry-breaking phases at low temperatures. (2) We then review the strong laser driving scenario, where the system is excited far from equilibrium and thereby subject to modifications to the free-energy landscape. Microscopic pathways for ultrafast laser manipulation of magnetic order are discussed. (3) Furthermore, we review a variety of protocols to manipulate coherent THz magnons in time and space, which are useful capabilities for antiferromagnetic spintronic applications. (4) Finally, new insights into the connection between dynamic magnetic coupling in condensed matter and the Dicke superradiant phase transition in quantum optics are provided. By presenting a review on an array of THz spin phenomena occurring in a single class of materials, we hope to trigger interdisciplinary efforts that actively seek connections between subfields of spintronics, which will facilitate the invention of new protocols of active spin control and quantum phase engineering.

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“…In the last two decades, numerous spin wave devices have been implemented by simulation and experiment (e.g. phase shifters, logic gates, transistors, multiplexers) [35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53]. However, most spin wave devices still have the problems of poor power consumption and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Spin wave propagation in uniform waveguide: effects, modulation and its application

Zheng¹,

Jin²,

Wen³

et al. 2022

J. Phys. D: Appl. Phys.

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With the advent of the post-Moore era, researches on beyond-Complementary Metal Oxide Semiconductor (CMOS) approaches have been attracted more and more attention. Magnonics, or spin wave is one of the most promising technology beyond CMOS, which magnons-quanta for spin waves-process the information analogous to electronic charges in electronics. Information transmission by spin waves, which uses the frequency, amplitude and (or) phase to encode information, has a great many of advantages such as extremely low energy loss and wide-band frequency. Moreover, using the nonlinear characteristics of spin waves for information transmission can increase the extra degree of freedom of information. This review provides a tutorial overview over the effects of spin wave propagation and recent research progress in uniform spin wave waveguide. The propagation characteristics of spin waves in uniform waveguides and some special propagation phenomena such as spin wave beam splitting and self-focusing are described by combining experimental phenomena and theoretical formulas. Furthermore, we summarize methods for modulating propagation of spin wave in uniform waveguide, and comment on the advantages and limitations of these methods. The review may promote the development of information transmission technology based on spin waves.

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Functional magnetic waveguides for magnonics

Cited by 18 publications

References 133 publications

Giant stress response of terahertz magnons in a spin-orbit Mott insulator

Giant stress response of terahertz magnons in a spin-orbit Mott insulator

Terahertz spin dynamics in rare-earth orthoferrites

Spin wave propagation in uniform waveguide: effects, modulation and its application

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