Laser irradiation effects in FeRh thin film

Abstract

The effect of laser irradiation in the energy range from 20 mW to 200 mW was investigated in 109 nm thick Fe _51 Rh _49 film deposited on an MgO (100) substrate. The initial, A1 structure with fully paramagnetic magnetic ordering was achieved after irradiating the samples with 120 keV Ne ^+ ions with a fluence of 1 × 10 ^16 ion cm ^−2 , as it was confirmed by conversion-electron Mössbauer spectroscopy. At higher powers physical damage of the layer was observed, while in the lowest power case, magnetic force microscopy revealed a well-defined magnetic structure reflecting the laser irradiation pattern. The presented results have the potential to be employed for laser ablation or allows the fabrication of arbitrary ferromagnetic pattern within a homogeneous paramagnetic FeRh thin films.

Keywords

• FeRh
• thin film
• nanostructures
• magnetism
• laser irradiation