Spin wave propagation in perpendicularly magnetized nm-thick yttrium iron garnet films

Chen, Jilei; Heimbach, Florian; Liu, Tao; Yu, Haiming; Liu, Chuan‐Pu; Chang, Houchen; Stückler, Tobias; Hu, Junfeng; Zeng, Lang; Zhang, Youguang; Liao, Zhi-Min; Yu, Dapeng; Zhao, Weisheng; Wu, Mingzhong

doi:10.1016/j.jmmm.2017.04.045

Cited by 38 publications

(12 citation statements)

References 30 publications

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“…This is the result of the smaller ∆k excitation in the CPW measurement. In similar works, normally CPWs with a thicker signal line of around 2 µm are used 2,31 , which show narrower ∆k excitation. So the dimensions of an antenna can be used to tune the limit of the excitation band and a CPW can be used to excite specific wave vectors with k =0.…”

Section: Measurement Resultsmentioning

confidence: 99%

Ultrabroadband spin-wave propagation in Co2(Mn0.6Fe0.4)Si thin films

Stückler

Liu

et al. 2017

Phys. Rev. B

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Ferromagnetic Heusler alloys with low magnetic damping are highly promising materials for magnonic devices, which rely on excitation and detection of spin waves. Using all-electrical spin wave spectroscopy we report spin wave propagation in sputtered Co 2 (Mn 0.6 ,Fe 0.4)Si Heusler alloy thin films with thickness of 50 nm. We integrated a nanostructured microwave antenna to locally excite and detect propagating spin waves in a Damon-Eshbach configuration. We estimate the group velocity to be up to 12.0 km/s and we observe spin wave propagation with a frequency band as broad as 15 GHz. From the experimental frequency dependence of group velocity we calculate the spin wave dispersion. Our results show that all-electrical measurements are a powerful method for determining the fundamental spin wave characteristics of Heusler alloys, over a broad and tunable range of frequencies, and with group velocities an order of magnitude higher than in conventional materials.

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Section: Measurement Resultsmentioning

confidence: 99%

Ultrabroadband spin-wave propagation in Co2(Mn0.6Fe0.4)Si thin films

Stückler

Liu

et al. 2017

Phys. Rev. B

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“…Attempts toward this goal are numerous in the recent literature 5,[7][8][9][10][11][12][13][14] . These experiments are all based on the measurement of spin wave propagation between antennas.…”

Section: Introductionmentioning

confidence: 99%

“…The integration constant is a wave vector that has to be determined. This difficulty is sometimes circumvented by postulating that the wavevectors can be exactly deduced from the a) Electronic mail: thibaut.devolder@c2n.upsaclay.fr antenna geometry and the profile of its rf fields [9][10][11][12]14 . This assumption is risky since the antenna radiation pattern can substantially differ from analytical estimates when permeable materials with finite conductivity are present in the surroundings of the antenna 15 .…”

Section: Introductionmentioning

confidence: 99%

Measuring the dispersion relations of spin wave bands using time-of-flight spectroscopy

Devolder,

Talmelli,

Ngom

et al. 2021

Preprint

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We develop a generic all-inductive procedure to measure the band structure of spin waves in a magnetic thin stripe. In contrast to existing techniques, our method works even if several spin wave branches coexist in the investigated frequency interval, provided that the branches possess sufficiently different group velocities. We first measure the microwave scattering matrix of a network composed of distant antennas inductively coupled to the spin wave bath of the magnetic film. After a mathematical transformation to the time-domain to get the transmission impulse response, the different spin wave branches are viewed as wavepackets that reach successively the receiving antenna after different travel times. In analogy with time-of flight spectroscopy, the wavepackets are then separated by time-gating. The timegated responses are used to recalculate the contribution of each spin wave branch to the frequency domain scattering matrix. The dispersion relation of each branch stems from the absolute phase of the time-gated transmission parameter. The spin wave wavevector can be determined unambiguously if the results for several propagation distances are combined, so as to get the dispersion relations.

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“…In comparison, other materials e.g., Heusler alloys 41,42 , permalloy 10,13,43–45 , and CoFeB 46 have damping at least an order of magnitude higher. However, the preparation of YIG 47–67 and etching or liftoff processes that preserve the properties of the YIG 60,61,66,68–70 present challenges, particularly for integration on a semiconductor platform. Second, to efficiently interconnect SW devices, the waveguides need to be curved or bent.…”

Section: Introductionmentioning

confidence: 99%

Three port logic gate using forward volume spin wave interference in a thin yttrium iron garnet film

Goto

Yoshimoto

Iwamoto

et al. 2019

Sci Rep

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We demonstrate a logic gate based on interference of forward volume spin waves (FVSWs) propagating in a 54 nm thick, 100 μm wide yttrium iron garnet waveguide grown epitaxially on a garnet substrate. Two FVSWs injected by coplanar waveguides were made to interfere constructively and destructively by varying their phase difference, showing an XNOR logic function. The reflected and resonant waves generated at the edges of the waveguide were suppressed using spin wave absorbers. The observed isolation ratio was 19 dB for a magnetic field of ~2.80 kOe ( = 223 kA m−1) applied perpendicular to the film. The wavelength and device length were ~8.9 μm and ~53 μm, respectively. Further, the interference state of the SWs was analyzed using three-dimensional radio frequency simulations.

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Spin wave propagation in perpendicularly magnetized nm-thick yttrium iron garnet films

Cited by 38 publications

References 30 publications

Ultrabroadband spin-wave propagation in Co2(Mn0.6Fe0.4)Si thin films

Ultrabroadband spin-wave propagation in Co2(Mn0.6Fe0.4)Si thin films

Measuring the dispersion relations of spin wave bands using time-of-flight spectroscopy

Three port logic gate using forward volume spin wave interference in a thin yttrium iron garnet film

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