Temperature dependence of the mean magnon collision time in a spin Seebeck device

Role of two-dimensional monolayer MoS2 interlayer in the temperature-dependent longitudinal spin Seebeck effect in Pt/YIG bilayer structures

“…12,14 To discuss magnon scattering, we must consider the different temperature-dependent magnon mean collision times in the calculations as previously reported. 18 Here, we substituted the temperature-dependent magnon relaxation time, s(T), derived from thermo-magneto dynamic calculations and experimental spin Seebeck coefficients, which correspond well with the experimental results of Basso et al 18,19 The calculations, including those of some integrals, were numerically performed for 10 K intervals in the temperature range of 0-300 K.…”

“…4c and d, the measured V ISHE of Pt/YIG increases up to ∼11.8 mV as the measurement temperature reaches 190 K, while that of Pt/ML MoS 2 /YIG shows a value of 4.80 mV at the same temperature of T = 190 K. Because V ISHE is directly proportional to the amount of spin voltage injected, as indicated in eqn (2), the injected spin current increases as the temperature decreases from 300 to 190 K. Starting from T = 300 K, as the ambient temperature decreases, the number of lled states of the thermally driven magnons in the YIG substrate also decreases. As a result, the number of magnon-magnon interactions reduces compared to those at T = 300 K. 12,18,39 Other predicted magnon behaviors at low temperatures are discussed in ESI. † 28,[40][41][42]…”