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Regular version of the site

Article

Magnetic structure of ErFe3(BO3)4: Spectroscopic and thermodynamic studies

Popova E., Chukalina E., Boldyrev K., Jablunovskis A., Gudim I.

We report on the high-resolution spectroscopic study of multiferroic ErFe3(BO3)4. The energies of all eight
Kramers doublets of the ground 4I15/2 multiplet of the Er3+ ion were determined by the high-resolution 4I13/2 →
4I15/2 infrared luminescence spectra. The spectroscopically determined temperature dependence of the splitting
of the ground Kramers doublet was used to calculate the contribution of the erbium subsystem into the specific
heat and the magnetic susceptibility of erbium iron borate. The analysis of the thermodynamic properties based
on these calculations allowed us to suggest the domain structure in the easy-plane antiferromagnetically ordered
iron subsystem, with two magnetically nonequivalent erbium positions in each domain.