  We investigated low-frequency current fluctuations, i.e. noise, in the
quasi-two-dimensional (2D) van der Waals antiferromagnetic semiconductor FePS3
with the electronic bandgap of 1.5 eV. The electrical and noise characteristics
of the p-type, highly resistive, thin films of FePS3 were measured at different
temperatures. The noise spectral density was of the 1/f - type over most of the
examined temperature range but revealed well-defined Lorentzian bulges, and
increased strongly near the Neel temperature of 118 K (f is the frequency).
Intriguingly, the noise spectral density attained its minimum at temperature
T~200 K, which was attributed to an interplay of two opposite trends in noise
scaling - one for semiconductors and another for materials with the phase
transitions. The Lorentzian corner frequencies revealed unusual dependence on
temperature and bias voltage, suggesting that their origin is different from
the generation - recombination noise in conventional semiconductors. The
obtained results are important for proposed applications of antiferromagnetic
semiconductors in spintronic devices. They also attest to the power of the
noise spectroscopy for monitoring various phase transitions.
