Optical and magneto-optical spectra and electron structure of ErAl3(BO3)(4) single crystal

摘要

Linearly polarized absorption spectra and magnetic circular dichroism (MCD) spectra of ErAl3(BO3)(4) single crystal were measured in the range of 10000-27000 cm(-1) at 90 K. The Stark components of the ground and excited multiplets of Er3+ ion were identified in terms of the irreducible representations, basing on the linearly polarized absorption spectra. MCD spectra permitted us to measure the Zeeman splitting of some transitions and so to determine changes of the Lande factors along the C-3 axis during these transitions. Additionally, the MCD spectra permitted us to identify some states in the vertical bar J, +/- M-J > function approximation. In particular, it was shown that the ground state of the Er3+ ion in this approximation has M-J = +/- 13/2 that corresponds to magnetic moment m = +/- 7.8 mu B. Very intensive f-f vibronic transitions, corresponding to electron transitions from the upper components of the ground multiplet, were revealed. Energies of the local vibrations in a number of the excited states were found. (C) 2016 Elsevier B.V. All rights reserved.