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The role of argon in yttrium aluminates
Author(s) -
Kvapil Ji.,
Mánek B.,
Perner B.,
Kvapil Jos.,
Becker R.,
Ringel G.
Publication year - 1988
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170230418
Subject(s) - argon , impurity , yttrium , doping , analytical chemistry (journal) , materials science , chemistry , laser , mineralogy , optics , metallurgy , optoelectronics , oxide , organic chemistry , chromatography , physics
Spectral properties of YAG and YAP grown in vacuum or under ArH 2 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 O 2 ) YAP crystals doped with Nd + Cr or Nd + Mo. The same red coloration of the doped YAGs is less stable.