Colour centres in yttrium aluminate crystals activated with transition metal ions

Dedicated to Professor Hermann Neels on the occasion of his 70th birthday Spectroscopic properties of YAG and YAP doped with F e were compared. YAG : F e crystals grown under reducing atmosphere showed strong colouration whereas similar colouration inYAP : F e was found after oxygen treatment. Nd3+ luminescence was effectively quenched by F e ions in YAP, whereas Ce3+ luminescence was quenched by F e ions in both the materials.Es werden spektroskopische Eigenschaften der init F e dotierten YAG und YAP verglichen. Die unter reduzierender Atmosphare gezuchteten YAG : Fe-Einkristalle weisen eine deutliche Farhung auf. Ahnliche Farbung zeigen die in Sauerstoffatmosphare geternperten YAP :Fe-Einkristalle. Fe-Ionen loschen die Ce3+-Lumineszenz in beiden Materialien. Nd3+-Lumineszenz wird von den Fe-Ionen besonders im YAP geloscht.

show abstract

Nonstoichiometric defects in YAG and YAP

Kvapil

Perner

Mánek

et al. 1985

Cryst. Res. Technol.

View full text Add to dashboard Cite

Spectroscopic properties of untloped YAG and YAP grown under rediicing protective attilosphere were coinpared. Blue (with F centre) or brown (with 0-centre) varieties both of t h e inaterials were p r o p r e d in t h e dependence of t h e Al,O,:Y,O, ratio in t h e melt. Colour intensity depends on the H,O : H, ratio in t h o protective atmosphere and on t h e s i p of electrical potential above t h e melt luvel.Tho coloration limy he easily reunoved by an annealing at > 1200-1400 "C. All t h e irregularities of the colourations or their reinowing b>-annealing iriay lie attributed t o t h e presence of iinpurities. E s werdcn spektroskopische Eigenschaften der undotiertcn i i n d unter retluziereiitlcr Atmosphiire geziichteten YAG und Y A P verglichen. Blaue (mit F-Zentren) odrr Iiraiine (rnit O--Zentreri) Varietiiten der heiden Materialien wurtlen in Abhiingigkoit volt1Alto, :Y,O,-Verhiiltriis i n der Schniclze gewonneri. Die I n t e n s i t i t der Fiirbung hiingt voiii H,O : H,-Vcrhiiltnis in der Schutxatinosphiire untl voiii Sinn tles elektr-ischeii Potcntials iilier der Sc:hinelzc al).Din Fiirbring karin iiian leicht bei einer Teitiperung h i > 1200-1400 'C entferrierr. Die Al~weichutigen tier Fiirbung oder der Fml)iinderring bei Temperlung inuW iinan allein tlcr Ariwcsrnkicit, von Verrinreinigringeri zuschreihrn.

show abstract

Colour centres in yttrium aluminate crystals activated with transition metal ions

Cited by 8 publications

References 7 publications

Workshop Proceedings of the Conference on Solid State Tunable Lasers Held at Hampton, Virginia on 13-15 June 1984.

Workshop Proceedings of the Conference on Solid State Tunable Lasers Held at Hampton, Virginia on 13-15 June 1984.

The role of iron ions in YAG and YAP

Nonstoichiometric defects in YAG and YAP

Contact Info

Product

Resources

About