Magnon decay

Author: hknr

August undefined, 2024

WebChern magnon bands can arise from other types of coupling including Kitaev and off-diagonal symmetric exchange ( 38, 39 ), long-range magnetostatic dipolar couplings ( 40, 41 ), nearest-neighbor exchange of dipolar character ( 42) and even simple XXZ couplings for noncoplanar spin textures ( 43 ). WebApr 5, 2024 · We use a pure spin current originating from the spin Hall effect to generate a spin-orbit torque (SOT) strongly reducing the effective damping in an adjacent ferromagnet. Due to additional microwave excitation, large spin-wave amplitudes are achieved exceeding the threshold for 4-magnon scattering, thus resulting in additional spin-wave signals at …

Spontaneous magnon decays in planar ferromagnet - ResearchGate

WebAug 27, 2024 · As reflected by the observed finite lifetime of the magnon BEC [8, 27], the magnon BEC is a metastable state with respect to thermal activations or decay to the excited states [30, 31]. This causes lower and upper limits of the magnon density required to form and destroy a magnon BEC, respectively. Webnonzero temperatures when magnon linewidth is deter-mined by scattering o thermal excitations, but also at T= 0 when damping is produced by spontaneous magnon decay. … green power cultivo

Field dependence of magnon decay in yttrium iron garnet thin films

WebJan 23, 2013 · Three principal cases of spontaneous magnon decays are considered: field-induced decays in Heisenberg antiferromagnets, zero-field decays in spiral … WebSep 9, 2024 · The decay of the longitudinal mode is particularly pronounced at the zone center. To account for the many-body effects of the interacting low-energy modes in … WebHence, the similarity between Fig. 8.4 (a) and (b) illustrates that the phenomenon of avoided decay is robust, i.e., it is not sensitive to small perturbations. Of course, the difference between an easy-plane and easy-axis anisotropy would affect low-energy properties. In contrast, magnon decay has experimentally been observed in a spin-2 TLHAF ... fly to pattaya

Long decay length of magnon-polarons in BiFeO 3/La 0.67 Sr …

In summary, our work has demonstrated long-distance magnon propagation in BFO/LSMO heterostructures. This is realized by the magnon–phonon coupling at the BFO/LSMO interface. As revealed by the AR-PSWS measurements, the pure magnon mode in LSMO shows a short decay length of ~5 µm, … See more The BFO/LSMO bilayer is grown on a NdGaO3 (NGO) substrate. The transmission electron microscope (TEM) characterization of the BFO/LSMO interface is … See more The coherent spin waves excited by NSL antennas have a non-zero wavevector distribution \(\triangle k\), and thus the propagation over a certain distance \(d\) … See more If the NSL antennas are replaced by coplanar waveguide (CPW) antennas5,8,46 (e.g., Sample Z15), the excitation is known to exhibit a specific wavevector … See more The transmission amplitude of mode Y is found to decay exponentially and a fitting yields a magnon decay length \({\lambda }_{{{{{{\rm{m}}}}}}}=5\,{{\upmu … See more WebThe mechanism for this magnon instability is the three-magnon scattering process, which is enhanced in the vicinity of the threshold for the decays of one-magnon to two-magnon states10–12. By contrast, the phenomenon of the ﬁeld-induced spontaneous magnon decay in ordered antiferromagnets (AFMs) is much less mature experimentally. fly to pata thailandWebDec 14, 2024 · Magnons can transfer information in metals and insulators without Joule heating, and therefore are promising for low-power computation. The on-chip magnonics however suffers from high losses due to limited magnon decay length. In metallic thin films, it is typically on the tens of micrometre length … green power definition

"WebDec 17, 2024 · Above a critical spin-orbit torque, the fully compensated damping manifests itself as an increase of magnon conductivity by almost 2 orders of magnitude. We compare our results to theoretical expectations based on recently predicted current induced magnon condensates and discuss other possible origins of the observed critical behavior. " - Magnon decay

Spontaneous magnon decays in planar ferromagnet - ResearchGate

Field dependence of magnon decay in yttrium iron garnet thin films

Magnon decay

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