Figure 6: 57Fe Mössbauer spectroscopy.
From: Programmable spin-state switching in a mixed-valence spin-crossover iron grid
(a) The light irradiation-dependent 57Fe Mössbauer spectra of [FeIII2FeII2] at 5 K. (b) The Mössbauer spectra confirm that irradiation with 532 nm (green) laser results in FeII-specific LIESST, while subsequent irradiation with 808 nm (red) laser light causes spin transitions to occur on the FeIII ions.
