Precise Determination of the Temperature Gradients in Laser-irradiated Ultrathin Magnetic Layers for the Analysis of Thermal Spin Current.

ABSTRACT: We investigated the temperature distribution induced by laser irradiation of ultrathin magnetic films by applying a finite element method (FEM) to the finite difference time domain (FDTD) representation for the analysis of thermal induced spin currents. The dependency of the thermal gradient (∇T) of ultrathin magnetic films on material parameters, including the reflectivity and absorption coefficient were evaluated by examining optical effects, which indicates that reflectance (R) and the apparent absorption coefficient (α^*) play important roles in the calculation of ∇T for ultrathin layers. The experimental and calculated values of R and α^* for the ultrathin magnetic layers irradiated by laser-driven heat sources estimated using the combined FDTD and FEM method are i

SUBMITTER: Surabhi S 

PROVIDER: S-EPMC6063919 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature