Crystal field analysis of Pr3+ and Nd3+ ions in KR(WO4)2 (R=Y or Gd) potassium rare-earth tungstates

A general trend of rare earth ions in the KRE(WO4)2 double tungstates (RE=Y, Yb, Gd, Lu)

“…Similar evolution was obtained for the case of rare earth ions doped in KGdW host [34]. The calculated N V parameter obtained for Er 3+ in KGdW [31], Pr 3+ in KGdW [33], Pr 3+ and Nd 3+ in KYW [33], Tm 3+ in KGdW and KLuW [34], Er 3+ in KYbW, KYW and KLuW (this work) and Yb 3+ in KYbW, KYW, KLuW and KGdW (this work) are reported in Table 6. We notice a decrease of N V parameter when the number of 4f electrons is increased (Fig.…”

“…Figs. 1 and 2 show the evolution of calculated CFPs with the ionic radius and with the N number of 4f electrons respectively in KYW in the case of Er 3+ and Yb 3+ lanthanides with those obtained for Pr 3+ and Nd 3+ in KYW [33]. As expected for the same Table 3.…”

“…deviation confirms the consistence of the fit. All obtained parameters are meaningful then compared to the CFPs of Er 3+ and Ho 3+ in KGdW [31], Pr 3+ in KGdW [33], Pr 3+ and Nd 3+ in KYW [33] and Tm 3+ in KGdW and KLuW [34].…”

Polarized spectroscopic properties of Nd3+-doped KGd(WO4)2 single crystal

“…The unit cell parameters of the KGW crystal are: a ¼ 10.652(4) Å ; b ¼ 10.374(6) Å ; c ¼ 7.582(2) Å ; b ¼ 130.80(2) Å , with Z ¼ 4 and space group C2/c [9]. The spectroscopic properties and laser potential of some rare earth ions doped KGW crystals have already been reported in the literature, which have demonstrated that they are attractive multifunctional laser media [4][5][6][7][8][9][10][11][12][13][14][15]. However, to the best of our knowledge, no detailed and complete information has been given about the polarized spectroscopic properties of the Nd 3+ -doped KGW crystals, which are important for evaluating its laser performances, designing its best laser operating conditions and comparing with other Nd 3+ laser crystals.…”

Crystal-field analysis of Er3+ ions in yttrium aluminium borate (YAB) single crystals

“…Indeed, simulations performed for different 4f n configurations either in the same [9] or in isostructural crystalline matrix [20][21][22], should provide sets of CFPs with only smooth variations. For this comparison, the use of the crystal-field strength parameters is more reasonable approach.…”