|
|||||
|
|
The role of argon in yttrium aluminates |
|
| Authors: | Ji Kvapil B Mnek B Perner Jos Kvapil R Becker G Ringel |
| Abstract: | Spectral properties of YAG and YAP grown in vacuum or under Ar H2 protective atmosphere were compared. The latter contained small amounts of argon which was detected by a laser mass spectral analysis. Ar impurity evokes brown colour of unannealed crystals and strenghtens anomalous red colour of annealed (Particularly in O2) YAP crystals doped with Nd + Cr or Nd + Mo. The same red coloration of the doped YAGs is less stable. |
| Keywords: | |