Spin-Wave-Driven Skyrmion Motion in Magnetic Nanostrip

The photon-assisted magnetic recording utilizes the ultrafast laser to excite the spin wave in the magnetic nanostructures and accordingly switch its magnetization state. Here, by means of micromagnetic simulation, the motion of magnetic skyrmions, a topologically protected chiral magnet with few nanometer size, induced by the spin wave is studied. It is found that the magnetic skyrmion can move in the same direction of spin-wave propagation, which is first accelerated and then decelerated exponentially. The magnetic skyrmion motion originated from the robust coupling of the spin waves with the skyrmion, through the SW’s linear momentum transfer torque acting on the skyrmion. Besides amplitude, the reflectivity of the spin wave by skyrmion has tremendous impact on the velocity of skyrmion motion. The skyrmion velocities are mainly determined by the reflectivity, when the spin-wave amplitude is almost identical. Our results give guidance for the design and development of spin-wave control spintronics.

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Tunable spin wave propagation in YIG-Rh stripe

IEEE Transactions on Magnetics ◽

10.1109/tmag.2021.3085402 ◽

2021 ◽

pp. 1-1

Author(s):

Sergey A. Odintsov ◽

Abdulkarim A. Amirov ◽

Alexandr P. Kamantsev ◽

Andrey A. Grachev ◽

Valeriya V. Rodionova ◽

...

Keyword(s):

Wave Propagation ◽

Spin Wave

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Microresonators and Microantennas—Tools to Explore Magnetization Dynamics in Single Nanostructures

Magnetochemistry ◽

10.3390/magnetochemistry7020028 ◽

2021 ◽

Vol 7 (2) ◽

pp. 28

Author(s):

Hamza Cansever ◽

Jürgen Lindner

Keyword(s):

Magnetic Resonance ◽

Spin Wave ◽

Focused Ion Beam ◽

Ion Beam ◽

Relaxation Times ◽

Magnetic Nanostructures ◽

Microwave Frequency ◽

Direct Access ◽

Magnetization Dynamics ◽

G Factor

The phenomenon of magnetic resonance and its detection via microwave spectroscopy provide insight into the magnetization dynamics of bulk or thin film materials. This allows for direct access to fundamental properties, such as the effective magnetization, g-factor, magnetic anisotropy, and the various damping (relaxation) channels that govern the decay of magnetic excitations. Cavity-based and broadband ferromagnetic resonance techniques that detect the microwave absorption of spin systems require a minimum magnetic volume to obtain a sufficient signal-to-noise ratio (S/N). Therefore, conventional techniques typically do not offer the sensitivity to detect individual micro- or nanostructures. A solution to this sensitivity problem is the so-called planar microresonator, which is able to detect even the small absorption signals of magnetic nanostructures, including spin-wave or edge resonance modes. As an example, we describe the microresonator-based detection of spin-wave modes within microscopic strips of ferromagnetic A2 Fe60Al40 that are imprinted into a paramagnetic B2 Fe60Al40-matrix via focused ion-beam irradiation. While microresonators operate at a fixed microwave frequency, a reliable quantification of the key magnetic parameters like the g-factor or spin relaxation times requires investigations within a broad range of frequencies. Furthermore, we introduce and describe the step from microresonators towards a broadband microantenna approach. Broadband magnetic resonance experiments on single nanostructured magnetic objects in a frequency range of 2–18 GHz are demonstrated. The broadband approach has been employed to explore the influence of lateral structuring on the magnetization dynamics of a Permalloy (Ni80Fe20) microstrip.

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Spin wave propagation in a uniformly biased curved magnonic waveguide

Physical Review B ◽

10.1103/physrevb.96.060401 ◽

2017 ◽

Vol 96 (6) ◽

Cited By ~ 45

Author(s):

A. V. Sadovnikov ◽

C. S. Davies ◽

V. V. Kruglyak ◽

D. V. Romanenko ◽

S. V. Grishin ◽

...

Keyword(s):

Wave Propagation ◽

Spin Wave

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High-power pumping wave influence on the volume spin wave propagation in a ferrite film

Technical Physics Letters ◽

10.1134/1.1262828 ◽

2000 ◽

Vol 26 (4) ◽

pp. 315-317

Author(s):

Yu. K. Fetisov

Keyword(s):

Wave Propagation ◽

Spin Wave ◽

High Power ◽

Ferrite Film

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Anisotropic spin-wave propagation in asymmetric width modulated Ni80Fe20 nanostripes

Materials Science and Engineering B ◽

10.1016/j.mseb.2021.115385 ◽

2021 ◽

Vol 272 ◽

pp. 115385

Author(s):

Arundhati Adhikari ◽

Chandrima Banerjee ◽

Amrit Kumar Mondal ◽

Avinash Kumar Chaurasiya ◽

Samiran Choudhury ◽

...

Keyword(s):

Wave Propagation ◽

Spin Wave

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Spin wave propagation through an antidot lattice and a concept of a tunable magnonic filter

Journal of Applied Physics ◽

10.1063/1.4812468 ◽

2013 ◽

Vol 114 (1) ◽

pp. 013905 ◽

Cited By ~ 23

Author(s):

E. K. Semenova ◽

D. V. Berkov

Keyword(s):

Wave Propagation ◽

Spin Wave

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Temperature control of spin wave propagation over 100 μm distance in 100 nm-thick YIG film

Physics Letters A ◽

10.1016/j.physleta.2018.10.016 ◽

2019 ◽

Vol 383 (4) ◽

pp. 366-368 ◽

Cited By ~ 3

Author(s):

Md Shah Alam ◽

Chuangtang Wang ◽

Jilei Chen ◽

Jianyu Zhang ◽

Chuanpu Liu ◽

...

Keyword(s):

Wave Propagation ◽

Spin Wave ◽

Temperature Control

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Spin Wave Propagation in Ferrimagnetic GdCo

10.7567/ssdm.2019.ps-9-08 ◽

2019 ◽

Author(s):

S. Funada ◽

T. Nishimura ◽

Y. Shiota ◽

S. Kasukawa ◽

M. Ishibashi ◽

...

Keyword(s):

Wave Propagation ◽

Spin Wave

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Simulation of the effect of stress-induced anisotropy on borehole compressional wave propagation

Geophysics ◽

10.1190/geo2013-0186.1 ◽

2014 ◽

Vol 79 (4) ◽

pp. D205-D216 ◽

Cited By ~ 13

Author(s):

Xinding Fang ◽

Michael C. Fehler ◽

Arthur Cheng

Keyword(s):

Wave Propagation ◽

Stress Concentration ◽

Elastic Properties ◽

Wave Velocity ◽

Wave Amplitude ◽

P Wave ◽

Azimuthal Variation ◽

P Wave Velocity ◽

Velocity Region

Formation elastic properties near a borehole may be altered from their original state due to the stress concentration around the borehole. This can lead to an incorrect estimation of formation elastic properties measured from sonic logs. Previous work has focused on estimating the elastic properties of the formation surrounding a borehole under anisotropic stress loading. We studied the effect of borehole stress concentration on sonic logging in a moderately consolidated Berea sandstone using a two-step approach. First, we used an iterative approach, which combines a rock-physics model and a finite-element method, to calculate the stress-dependent elastic properties of the rock around a borehole subjected to an anisotropic stress loading. Second, we used the anisotropic elastic model obtained from the first step and a finite-difference method to simulate the acoustic response of the borehole. Although we neglected the effects of rock failure and stress-induced crack opening, our modeling results provided important insights into the characteristics of borehole P-wave propagation when anisotropic in situ stresses are present. Our simulation results were consistent with the published laboratory measurements, which indicate that azimuthal variation of the P-wave velocity around a borehole subjected to uniaxial loading is not a simple cosine function. However, on field scale, the azimuthal variation in P-wave velocity might not be apparent at conventional logging frequencies. We found that the low-velocity region along the wellbore acts as an acoustic focusing zone that substantially enhances the P-wave amplitude, whereas the high-velocity region caused by the stress concentration near the borehole results in a significantly reduced P-wave amplitude. This results in strong azimuthal variation of P-wave amplitude, which may be used to infer the in situ stress state.

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