Giant spin-vorticity coupling excited by shear-horizontal surface acoustic waves

Huang, Mingxian; Hu, Wenbin; Zhang, Huaiwu; Bai, Feiming

doi:10.1103/physrevb.107.134401

Cited by 4 publications

(4 citation statements)

References 36 publications

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“…在瑞利波和西沙瓦波中, 质点在xOz面内旋转, 具有ω xz 分量. 在具有面外磁各向异性的薄膜中, 质点的旋转将引起磁矩的旋转, 与面外易轴产生夹角, 进而贡献额外的磁各向异性能, 即磁-旋转耦合(magneto-rotation coupling)能 [32,45] : 示为 [27,46] [52] ; (f) magnon-phonon coupling. SAW的非互易传播 [47] .…”

Section: 声波的非互易传播unclassified

“…实验上已经在Co/Pt 双层膜中得到了证实 [24] , 器件构型如图8(a)所示. [24] ; (c) 声学谐振腔增强声自旋泵浦 [26] ; (d) 瑞利波通过自旋-旋转耦合产生自旋流 [27] ; (e) 水平剪切波通过自旋-旋转耦合产生自旋流 [28] Fig. 8.…”

Section: 声波产生自旋流unclassified

“…8. Generation of spin current by SAW: (a), (b) Acoustic spin pumping [24] ; (c) enhancement of acoustic spin pump by the acoustic cavity [26] ; (d) Rayleigh wave generates spin current by spin-rotation coupling [27] ; (e) shear horizontal wave generates spin current by spin-rotation coupling [28] . 实验上在Ni/Cu(Ag)/Bi 2 O 3 体系中同样可以产生声自旋泵浦效应 [25] , 其中产生的自旋流通过逆 Edelstein效应转化为电荷流, 这来源于两层非磁界面处的空间反演破缺.…”

Section: 声波产生自旋流unclassified

“…非磁金属中产生纯自旋流. 例如在NiFe(Py)/Cu 体系中 [27] , 在Cu层中产生交变的自旋流, 随后扩散到界面. 自旋流在Py层的磁矩上施加自旋力矩, 驱动其发生FMR, 进而观察到SAW透射功率的显著吸收, 如图8(d)所示.…”

Section: 基于第2节讨论的自旋-旋转耦合 Saw可在unclassified

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Magneto-acoustic coupling: Physics, materials, and devices

Chen,

Ma,

Pan

et al. 2024

Acta Phys. Sin.

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Acoustic waves in solids have two modes of propagation: the bulk acoustic wave (BAW), which propagates inside solids in the form of longitudinal or transverse wave, and the surface acoustic wave (SAW), which is generated on the surface of solids and propagates along the surface. Acoustic radio frequency (RF) technologies utilize acoustic waves to intercept and process RF signals, which are typified by the rapidly developing RF filter technology. Acoustic filters have the advantages of small size, low cost, steady performance and simple fabrication, and are widely applied in mobile communications and other fields. Due to the mature fabrication process and well-defined resonance frequency of acoustic devices, acoustic wave has become an extremely intriguing way to manipulate magnetism and spin current, with the goal of pursuing miniaturized, ultra-fast, and energy-efficient spintronic device applications. The integration of magnetic materials into acoustic RF devices has also provided a new way of thinking about the means of acoustic device modulation and performance enhancement. This review firstly summarizes various physical mechanisms of magneto-acoustic coupling, and then based on these mechanisms, a variety of magnetic and spin phenomena such as acoustically controlled magnetization dynamics, magnetization switching, magnetic domain wall and magnetic skyrmions generation and motion, and spin current generation are systematically introduced. In addition, the progress of research on magnetic control of acoustic wave, the inverse process of acoustic control of magnetism, is discussed, including the magnetic modulation of acoustic wave parameters and nonreciprocal propagation of acoustic waves, as well as new magneto-acoustic devices developed based on this, such as SAW-based magnetic field sensors, magneto-electric antennas, tunable filters, and so on. Finally, possible future research goals and applications of magneto-acoustic coupling are envisioned. In summary, the field of magneto-acoustic coupling is still in a stage of rapid development, and a series of groundbreaking breakthroughs have been made in the last decades, and this paper summarizes the major advances in this field. The field of magneto-acoustic coupling is expected to make further significant breakthroughs, and we hope that this review will further advance the physical phenomena of the coupling between magnetism and acoustic wave, spin and lattice, as well as the potential device applications.

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Section: 声波的非互易传播unclassified

Section: 声波产生自旋流unclassified

Section: 基于第2节讨论的自旋-旋转耦合 Saw可在unclassified

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Magneto-acoustic coupling: Physics, materials, and devices

Chen,

Ma,

Pan

et al. 2024

Acta Phys. Sin.

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Phonon–magnon conversion using longitudinal leaky surface acoustic waves through magnetoelastic coupling

Huang

Zhang

et al. 2023

Journal of Applied Physics

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Surface acoustic waves (SAWs) can transmit magnetization oscillation inside magnetoelastic films in the form of magnetoacoustic waves. If the frequency and wavenumber of SAWs match those of spin waves, magnon excitation can be observed. In this work, we studied the phonon–magnon conversion excited by longitudinal leaky SAWs, which possess the same dominant strain component like Rayleigh-type SAWs but a much higher phase velocity. The measured transmission power absorptions of both SAW modes due to spin wave resonance follow a linear frequency dependence and exhibit a fourfold symmetry. We demonstrate that longitudinal leaky SAWs can serve as a very effective means to excite stronger phonon–magnon coupling than Rayleigh SAWs at a lower wave number.

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Large nonreciprocity of shear-horizontal surface acoustic waves induced by a magnetoelastic bilayer

Huang,

Liu,

et al. 2024

Phys. Rev. Applied

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Giant spin-vorticity coupling excited by shear-horizontal surface acoustic waves

Cited by 4 publications

References 36 publications

Magneto-acoustic coupling: Physics, materials, and devices

Magneto-acoustic coupling: Physics, materials, and devices

Phonon–magnon conversion using longitudinal leaky surface acoustic waves through magnetoelastic coupling

Large nonreciprocity of shear-horizontal surface acoustic waves induced by a magnetoelastic bilayer

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