Fig. 2
From: Mössbauer spectroscopy of a monolayer of single molecule magnets

Mössbauer spectra of the dropcast and monolayer samples for various temperatures. a Experimental spectra (black lines) of the Fe4 dropcast sample and best fit curves (red lines). b Experimental spectra (black lines) of the Fe4 monolayer sample and best fit curves (red lines). The velocity axis values are relative to the α-Fe standard