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• W2899506875 abstract "Information transport with the spin degree of freedom was adapted to revive electronic devices. In particular, magnon, the flow of quantized excitations of the spin system have been considered as the ideal carrier because of its excellent transport characters. Ferromagnetic insulators (FMIs) was most promising material for magnon devices to generate, process, and transport spin information over long distances[1]. Some phenomena explored in insulating spintronics include spin pumping, the spin Seebeck effect, the spin Peltier effect, magnon drag effect, and magnon spin transport (MST) [2–6]. While, a precise magnon transport picture in FMIs thin film was still demanded. A novel complete picture of magnon transport in FMIs was builded with a new Boltzmann equation which combined magnon, phonon and spin-polarized electron system together. In three magnons scattering, we found the N-process scattering which due to dipole-dipole interaction, dominated the decay dynamics of magnon group. To conduct N-process scattering, a new spatial dependent magnon draft field U was introduced, which was describing collective local motion field in magnon. We also found N-process scattering is the physical origin that why coherence magnons can transfer to thermal magnons in FI relaxation process. With those effects, we proposed a new method try to modify generation, amplification and controlling of magnon transport and the conversion to other particles (phonon). In our state of art Boltzmann equation, we analyses three-magnon scattering with a new spatial dependent magnon interaction field U, and construct the effective magnon temperature. We also find that three-magnon scattering causes at least two physical effects. First, it takes part in the thermal conductivity adjustment as anther heat carrier in addition to phonon. Second, it is also the physical origin that why coherence magnons can transfer to thermal magnons in FI relaxation process. Beside we also fund nonlinear effect of magnon in transport length(see attach figure). With those two effects, we find a brand new method to effectively generate, amplify and control magnon transport and the conversion with other particles. Furthermore, three-magnons scattering engender a novel collective dynamic of magnon, which is the extending of global decay length of spin information. In this framework, we also provide the methods to adjust the magnon distribution, with applying the gradient magnetic field and temperature field." @default.
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• W2899506875 date "2018-04-01" @default.
• W2899506875 modified "2023-09-27" @default.
• W2899506875 title "The General Boltzmann Method for Magnon Transport with Full scattering Process" @default.
• W2899506875 doi "https://doi.org/10.1109/intmag.2018.8508051" @default.
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