Premium
O − centre formation in YAG crystals doped with rare earth ions
Author(s) -
Kvapil Jiří,
Kvapil Josef,
Perner Bohumil
Publication year - 1975
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.19750100211
Subject(s) - doping , irradiation , ion , rare earth , annealing (glass) , argon , materials science , oxygen , hydrogen , analytical chemistry (journal) , nuclear chemistry , chemistry , metallurgy , optoelectronics , physics , organic chemistry , chromatography , nuclear physics
Colour changes of YAG crystals doped with rare earth ions and annealed in hydrogen, oxygen, vacuum or argon are described. The influence of UV irradiation is also given. Some crystals were further doped with Ca, Sr, Ba, or Cr, respectively. Yellow or brown colouring of the crystals is attributed to the O − centre formation which causes an increase of the absorption peak at 395–410 nm. Most intensive colouring showed the crystals containing a combination of Yb or Eu with Nd or Cr after oxygen annealing followed by UV irradiation.