Inverse spin-Hall effect voltage generation by nonlinear spin-wave excitation

Feiler, Laura; Sentker, Kathrin; Brinker, Manuel; Kuhlmann, Nils; Stein, Falk-Ulrich; Meier, Guido

doi:10.1103/physrevb.93.064408

Cited by 9 publications

(9 citation statements)

References 46 publications

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“…Thus, if the phase of the pumping field is kept fixed with a certain reference value, the phase of the signal spin waves is directly transferred into an amplified intensity. This intensity can be readout conveniently by conventional detection schemes such as the inverse Spin Hall effect in combination with spin pumping or the tunneling magnetoresistance effect [61,[100][101][102][103][104], which convert the AC spin-wave intensity into a DC voltage. Hereby, the inherent amplification of the spin waves with proper phase facilitates the readout and allows to operate with a low spin-wave intensity in the conduit, minimizing energy costs and nonlinear spin-wave interaction.…”

Section: Phase-to-intensity Conversionmentioning

confidence: 99%

Parallel pumping for magnon spintronics: Amplification and manipulation of magnon spin currents on the micron-scale

2017

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Magnonics and magnon spintronics aim at the utilization of spin waves and magnons, their quanta, for the construction of wave-based logic networks via the generation of pure all-magnon spin currents and their interfacing with electrical charge transport. The promise of efficient parallel data processing and low power consumption renders this field one of the most promising research areas in spintronics. In this context, the process of parallel parametric amplification, i.e., the conversion of microwave photons into magnons at one half of the microwave frequency, has proven to be a versatile tool to excite and to manipulate spin waves. Its beneficial and unique properties such as frequency and mode-selectivity, the possibility to excite spin waves in a wide wavevector range and the creation of phase-correlated wave pairs, have enabled the achievement of important milestones like the magnon Bose Einstein condensation and the cloning and trapping of spinwave packets. Parallel parametric amplification, which allows for the selective amplification of magnons while conserving their phase is, thus, one of the key methods of spin-wave generation and amplification.The application of parallel parametric amplification to CMOS-compatible micro-and nanostructures is an important step towards the realization of magnonic networks. This is motivated not only by the fact that amplifiers are an important tool for the construction of any extended logic network but also by the unique properties of parallel parametric amplification. In particular, the creation of phase-correlated wave pairs allows for rewarding alternative logic operations such as a phase-dependent amplification of the incident waves. Recently, the successful application of parallel parametric amplification to metallic microstructures has been reported which constitutes an important milestone for the application of magnonics in practical devices. It has been demonstrated that parametric amplification provides an excellent tool to generate and to amplify spin waves in these systems in a wide wavevector range. In particular, the amplification greatly benefits from the discreteness of the spin-wave spectra since the size of the microstructures is comparable to the spin-wave wavelength. This opens up new, interesting routes of spin-wave amplification and manipulation. In this Review, we will give an overview over the recent developments and achievements in this field.

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Section: Phase-to-intensity Conversionmentioning

confidence: 99%

Parallel pumping for magnon spintronics: Amplification and manipulation of magnon spin currents on the micron-scale

2017

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“…In materials with large spin diffusion length, it acts as a spin battery [16,17]. The dc component of the spin current is detected in numerous experiments [8,[18][19][20][21][22][23][24]. Few experiments study spin pumping via burst excitation with burst duration longer than the intrinsic dynamics of the magnetic system [25].…”

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confidence: 99%

“…The in-plane polarized ac current, however, reduces to an asymptotic value that is only a factor of 10 smaller than at resonance. For a Py=Pt bilayer (g ↑↓ ¼ 3.9 × 10 19 m −2 [23]) this off-resonant spin current would be ⃗ I ac s ≈ 4 × 10 25 ℏ=ðsm 2 Þ. For Ω ≫ ω r , the contribution of the ac spin current is given by [35]…”

mentioning

confidence: 99%

Coherent THz Transient Spin Currents by Spin Pumping

Bocklage

2017

Phys. Rev. Lett.

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The generation of short spin current pulses is the basis for fast spintronic devices. In thin bilayer systems consisting of a nonmagnetic metal and a ferromagnet, a pure spin current is induced by a precessing magnetization into the nonmagnetic layer by spin pumping. This effect has been experimentally demonstrated at ferromagnetic resonance at GHz frequencies. Here, it is theoretically shown that transient magnetization dynamics efficiently generates short spin current pulses that exhibit two transient contributions. An effective coherent spin current generation is found far above the ferromagnetic resonance up to THz frequencies although dynamic magnetization amplitudes are very small in this regime. The results provide a concept for coherent THz spin current generation.

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“…ISHE is one of the possible alternatives which may be more scalable and less sensitive to the direct input-output coupling. SW detection using ISHE was presented in a number of works [9][10][11][12]. For instance, it was experimentally demonstrated magnon spin transport between the spatially separated inductive pulse spin-wave source and the ISHE detector [12].…”

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confidence: 99%

Spin wave interference detection via inverse spin Hall effect

Balinskiy

Chiang

Montes

et al. 2021

Applied Physics Letters

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In this letter, we present experimental data demonstrating spin wave interference detection using spin Hall effect (ISHE). Two coherent spin waves are excited in a yttrium-iron garnet (YIG) waveguide by continuous microwave signals. The initial phase difference between the spin waves is controlled by the external phase shifter. The ISHE voltage is detected at a distance of 2 mm and 4 mm away from the spin wave generating antennae by an attached Pt layer. Experimental data show ISHE voltage oscillation as a function of the phase difference between the two interfering spin waves. This experiment demonstrates an intriguing possibility of using ISHE in spin wave logic circuit converting spin wave phase into an electric signal.

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Inverse spin-Hall effect voltage generation by nonlinear spin-wave excitation

Cited by 9 publications

References 46 publications

Parallel pumping for magnon spintronics: Amplification and manipulation of magnon spin currents on the micron-scale

Parallel pumping for magnon spintronics: Amplification and manipulation of magnon spin currents on the micron-scale

Coherent THz Transient Spin Currents by Spin Pumping

Spin wave interference detection via inverse spin Hall effect

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