Mossbauer spectroscopy Zeeman splitting

In contrast to the neutron diffraction which reflects the spatial correlation of spins, Mossbauer spectroscopy reveals information on the time correlation of one spin. If the system is not in thermal equilibrium, these two correlations are not identical. In addition, information can be drawn from the Mossbauer spectra on the electronic state including the charged state of the Fe atoms from the isomer shift, the electric quadrupole splitting and Zeeman splitting due to the internal field. When the specimen is a single crystal, the spin direction can also be determined from intensities of each component of the sextet. 

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