Vacuum ultraviolet spectra and crystal field analysis ofYAlO3doped withNd3+and

Abstract

The synchrotron radiation excited emission and excitation spectra are reported at temperatures of 298 and 10 K for YAlO 3 ͑YAP͒ doped with 1 at. % Nd 3+ or Er 3+. For both systems, no d-f emission is observed and these results are rationalized and compared with other hosts. For YAP: Nd 3+ , excitation into the 4f 2 5d electronic configuration of Nd 3+ gives intraconfigurational luminescence from 2 G͑2͒ 9/2 and 4 F 3/2 and there is no evidence for emission from other multiplet terms. Luminescence from 2 P 3/2 is observed for YAP: Er 3+ , with additional transitions from 4 S 3/2 , 4 F 9/2 , 4 I 9/2 , and 4 I 11/2. The emission spectra have been assigned in detail. The literature energy level datasets are mostly consistent with the derived energy levels from the present study. The f-d excitation spectra show that the lowest d-electron levels are energetically situated below the intrinsic absorption of the host. Crystal field analyses have been performed by using 100 energy levels for each system and the resulting standard deviations were 12.4 and 15.5 cm −1 for Er 3+ and Nd 3+ , respectively. The multiplet term barycenters are better fitted for the case of Nd 3+ , whereas crystal field splittings are better modeled for Er 3+. The fitted free ion parameters exhibit considerably less uncertainty for Nd 3+ .

Lanthanide 4f energy levels in perovskite-type YAlO3

“…Actually, it was reported that YF 3 :Pr 3 þ shows 4f-4f emission from 1 S 0 [38,39]. In Nd 3 þ and Tm 3 þ doped YAlO 3 , many luminescence peaks were observed by various 4f-4f transitions [40][41][42][43][44][45][46][47]. Some UV luminescence peaks in the Nd 3 þ and Tm 3 þ samples were observed mainly from the emission levels of 2 G(2) 9/2 and 3 P 0, respectively.…”

Concentration dependence study of VUV–UV–visible luminescence of Nd3+ and Gd3+ in LuLiF4

“…Fast scintillators emitting in VUV spectral region can be coupled with position-sensitive detectors filled with photosensitive gases or with other VUV-sensitive detectors and used in special imaging techniques [1]. Wide band-gap fluorides are the best single crystal host for this purpose, and the Nd 3+ ion provides fast 5d-4f emission around 180-190 nm in the host lattices like LaF 3 , LiYF 4 , LuLiF 4 , BaY 2 F 8 and others [2][3][4], while the oxide hosts are not suitable for this purpose due to the overlap of the lowest lying 5d levels with the 4f ones [5]. High energy shifted Nd 3+ emission, i.e.…”

Light-induced coloration and transformation process in YAlO3 crystal

“…YAP crystals have good optical, thermal and mechanical properties similar to YAG crystals. YAP single crystals doped with rare-earth and transition metal ions are prospective materials for laser engineering, scintillators, holographic recording, data storage and substrate materials for thin films of high-temperature superconductors [3][4][5]. Point defects created during crystal growth or under different external stimulus (irradiation, thermal treatment, etc.)…”