Abstract
Tb3+ doped single crystals of huntite-type YAl3(BO3)4 (YAB) have been characterized by means of Fourier transform absorption spectroscopy in the wave number range 500-25000 cm−1 and in the temperature range 9-300 K, and by means of 9 K linear dichroism measurements. Crystal-field splitting of the fundamental 7F6 and of the excited 7F5, 7F4, 7F3, 7F2, 7F1, 7F0, and 5D4 manifolds of Tb3+ have been analyzed and fitted within a single ion Hamiltonian model, to obtain free-ion and crystal-field parameters. The electron-phonon interaction has been put into evidence by thermally induced line shift and discussed in the framework of a single phonon coupling model.
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