Parallel pump spin wave instability threshold in thin ferromagnetic films

Kostylev, Mikhail; Kalinikos, B. A.; Dötsch, H.

doi:10.1016/0304-8853(94)01612-7

Cited by 22 publications

(19 citation statements)

References 10 publications

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“…Parametric generation is referred to as the amplification of thermal spin waves [30,48,[53][54][55][56][57][58][59]. Spin waves are always thermally excited at room temperature due to their µeV excitation energy.…”

Section: Parametric Generation -Amplification Of Thermal Wavesmentioning

confidence: 99%

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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: Parametric Generation -Amplification Of Thermal Wavesmentioning

confidence: 99%

“…It should be noted that the jumps from one waveguide mode to another are analogous to the transitions between the different standing modes across the film thickness in thin, but not ultra-thin, films (cf., e.g., Refs. [54][55][56][57][58][59]).…”

Section: Parametric Generation In Longitudinally Magnetized Waveguidesmentioning

confidence: 99%

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

2017

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“…Another important parameter of the waveguide modes in the spin-wave waveguides is their ellipticity, which, amongst others, influences the threshold for the parametric instability [54][55][56][57] and which is given by 58…”

Section: Analytical Modelmentioning

confidence: 99%

Creation of unidirectional spin-wave emitters by utilizing interfacial Dzyaloshinskii-Moriya interaction

et al. 2017

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“…Parallel pumping of spin waves222324252627 is the application of parametric amplification or parametric resonance, a common phenomenon in many areas of physics3132333435, to the spin-wave manifold in a magnetic material. In contrast to, for instance, optical parametric amplification, where photons are converted into photons, or in contrast to other spin-wave instabilities, where magnons are converted into magnons, parallel pumping constitutes a photon-magnon interaction.…”

Section: Non-adiabatic Parallel Pumping As a Tool For The Phase-to-inmentioning

confidence: 99%

“…This phase-to-intensity conversion is based on phase-dependent spin-wave amplification by means of non-adiabatic parallel pumping222324252627, a process which takes place within the spin-wave system itself. We have realized this phase-to-intensity conversion for spin waves in a microstructured magnonic waveguide made from Ni 81 Fe 19 (Permalloy, Py).…”

mentioning

confidence: 99%

Phase-to-intensity conversion of magnonic spin currents and application to the design of a majority gate

Brächer

Heussner

Pirro

et al. 2016

Sci Rep

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Magnonic spin currents in the form of spin waves and their quanta, magnons, are a promising candidate for a new generation of wave-based logic devices beyond CMOS, where information is encoded in the phase of travelling spin-wave packets. The direct readout of this phase on a chip is of vital importance to couple magnonic circuits to conventional CMOS electronics. Here, we present the conversion of the spin-wave phase into a spin-wave intensity by local non-adiabatic parallel pumping in a microstructure. This conversion takes place within the spin-wave system itself and the resulting spin-wave intensity can be conveniently transformed into a DC voltage. We also demonstrate how the phase-to-intensity conversion can be used to extract the majority information from an all-magnonic majority gate. This conversion method promises a convenient readout of the magnon phase in future magnon-based devices.

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Parallel pump spin wave instability threshold in thin ferromagnetic films

Cited by 22 publications

References 10 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

Creation of unidirectional spin-wave emitters by utilizing interfacial Dzyaloshinskii-Moriya interaction

Phase-to-intensity conversion of magnonic spin currents and application to the design of a majority gate

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