2015/12/02 by Vittorio Basso, Elena Ferraro, Basso, Vittorio +10
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic Properties and Applications #Magnetic properties of thin films #Materials Science (cond-mat.mtrl-sci) #Quantum and electron transport phenomena #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.1512.00644
This paper has been withdrawn by the author because the main results are included in the paper in arXiv:1512.08890. Journal-ref: Phys. Rev. B 93, 184421 (2016)
openalex publication_date 2015/12/02 · openalex created_date 2016/06/24 · arxiv created 2016/12/20 · arxiv updated 2016/12/21 · openalex updated_date 2026/07/28
We employ the non-equilibrium thermodynamics of currents and forces to describe the heat transport caused by a spin current in a Pt/YIG bilayer. By starting from the constitutive equations of the magnetization currents in both Pt and YIG, we derive the magnetization potentials and currents. We apply the theory to the spin Peltier experiments in which a spin current, generated by the spin Hall effect in Pt, is injected into YIG. We find that efficient injection is obtained when: i) the thickness of each layer is larger than its diffusion length: tPt > lPt and tYIG > lYIG and ii) the ratio (lPt/τPt)/(lYIG/τYIG) is small, where τi is the time constant of the intrinsic damping (i=Pt, YIG). We finally derive the temperature profile in adiabatic conditions. The scale of the effect is given by the parameter ΔTSH which is proportional to the electric current in Pt. Using known parameters for Pt and YIG we estimate ΔTSH/je = 4 ⋅ 10-13 K A-1m2. This value is of the same order of magnitude of the spin Peltier experiments.