Pulsed laser ablation in liquid (PLAL) has received much attention in the past decades because it is green and sustainable method for the particle synthesis. Here in this work, the influence of different laser settings on particles´ formation mechanisms were investigated. Three important factors that determines the particles´ formation mechanisms are: laser pulse duration, laser pulse energy and repetition rate. For this purpose, bimetallic Fe/Au particles have been prepared by the PLAL method with two different lasers – short (pico-second laser) and long (nano-second laser) pulse duration. Characterization methods (SEM, TEM, EDX, VSM) have shown significant differences in morphology, particles´ size distribution and magnetic properties of Fe/Au particles when produced by different lasers. Pico-second (ps) laser Fe/Au particles displayed broad monomodal size distribution with the homogeneous (alloyed) particles as the main particles´ species. Contrary to this, the nano-second (ns) laser generated particles showed bimodal size distribution with the phase-segregated particles as the main particles´ species. Results in this work suggests that during the particle synthesis with the ns laser in addition to the PLAL process, the pulsed laser melting in liquid (PLML) and the pulsed laser fragmentation in liquid (PLFL) also occur. The magnetic properties of the Fe/Au particles are strongly influenced by the metal compositions, still VSM results showed significant differences between pico- and nano-second laser generated particles. Based on these findings, we propose a new particle´ formation processes that are occurring during the PLAL.