Thermal Response Simulation of Tetralayer Thin Film Structure under Ultrafast Laser

Ali, Saffa; Ali, Haidar

doi:10.25673/123567

Proceedings of International Conference on Applied Innovation in IT · 2026/03/31 · Vol. 14 · Issue 1 · pp. 251–258

Thermal Response Simulation of Tetralayer Thin Film Structure under Ultrafast Laser

Saffa Issam Mohamad Ali, Haidar Jawad Mohamad and Mohammed Jassim Mohammed Ali

📄 Download PDF DOI: 10.25673/123567

Abstract

Spin current in spintronics devices is mostly affected by the thermal gradient within storage devices. In this current study, the thermal response of a tetralayer thin film structure in a three-dimensional numerical simulation was observed. This model was exposed to irradiation by an ultrafast femtosecond pulsed laser. On nanosecond timescales, the model integrates heat transfer in solids to show both the energy absorption and subsequent thermal diffusion accurately. The tetralayer sample was composed of ferromagnetic (FePt)/ferromagnetic (Py)/spacer (Cu)/magnetic insulator (YIG) sequentially. Parameters such as thickness and time were shown to have a major effect on the generated spin current, as proven and shown by the simulation results. In addition to that, the temperature gradients within the tetralayer are crucial for generating the spin current and demonstrate the significant influence of material characteristics and layer location on the governance of ultrafast thermal transport in multilayer thin film systems. Through most of the simulation experiments, the FePt layer experiences the most significant and noticeable temperature increase after the laser excitation.

Keywords

Ultrafast Laser COMSOL Simulation Thin Film Thermal Effect Four-Layer Structure Heat Transfer Laser-Induced Heating.

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