Energy levels and crystal field parameters of Nd³⁺and Er³⁺in LiRP₄O₁₂single crystals

Abstract

The experimental Stark energy levels for the Nd"' and Er" in LiRP40,2 crystals were presented in our previous paper [13]. A crystal field analysis of these data is based on a Uamiitonian of C2 p i n t group symmetry, including J-mixing efJects. We find that the twinned G,c (C,) structure is consistent with all available experimental results. A Hamiltonian parametrized in monoclinic symmetry was used to describe the observed cryrtalfield splinings of Nd" and Er" in LiRP,O,>. Resulting RMS deviations between calculated and experimental levels range from 6.8 to 7.1 cm".

Modeling the absorption spectra of Er3+ and Yb3+ in a phosphate glass

“…The final calculation is given in ions occupy sites of C 2 symmetry in the lattice. 26 The agreement between the glass and crystal spectra, and the calculated splitting supports the choice of C 2 symmetry for the averaged Er 3ϩ sites in the phosphate glass.…”

“…5͒ with the crystal-field ͑Stark͒ splitting of the same multiplet manifolds of Er 3ϩ in single-crystal LiErP 4 O 12 reported by Mazurak and Gruber. 26 The similarity suggests that the coordination of the tetraphosphates around Er 3ϩ in the glass and in the crystal is similar, and that choosing an averaged site symmetry of C 2 for Er 3ϩ in the glass is reasonable, given that the pointgroup symmetry of Er 3ϩ in the crystal lattice of LiErP 4 O 12 is reported as C 2 based on x-ray crystallographic studies on single crystals. 21,22…”

Spectroscopic properties of Er3+ in LiErP4O12 and LiErYP4O12 single crystals

“…The optical absorption measurements, the derived spectroscopic parameters and the intensity analysis reported here for LiErP 4 O 12 and LiErYP 4 O 12 go beyond the previous studies [3,[18][19][20] on this system. We have observed twice as many multiplet states [SL]J (at wavenumbers higher than 23,000 cm −1 ), different set of intensity parameters for E-mail address: bm ang@abv.bg.…”

“…The standard deviations between experimental and calculated oscillator strengths in Table 1 [18][19][20].…”

Crystal growth and characterization of non-centrosysmmetric polyphosphates, type III KNd(PO3)4 and KGd(PO3)4

“…Condensed rare earth phosphates M I Ln(PO 3 ) 4 (where M I is a monovalent cation and Ln is a rare earth) have been studied extensively for potential applications in the laser technology domain [1][2][3][4][5]. These compounds are polymorphic.…”