[Determination of distribution and effective distribution coefficient of Cr3+ in LiNbO3 single crystals using UV/Visible absorption spectra and ICP].
The LiNbO3 crystals doped with Cr3+ ion (Cr:LN) and co-doped with Cr3+ and Zn ions (Zn:Cr:LN) were grown by the Bridgman method. The absorption coefficient and concentration of Cr3+ in crystals were measured by UV/Visible spectra and inductively coupled plasma (ICP) spectrometry, respectively. The effective distribution coefficients (k) of Cr3+ in the crystals were calculated. The results indicated that the k for Cr:LN crystal decreased from 3.75 to 2.49 as the incorporating concentration of Cr3+ increased from 0.1 to 0.5 mol%; the introduction of ZnO in Cr:LN induced the reduction of k value effectively. However, the k value increased from 1.85 to 2.25 as the incorporating concentration of ZnO increased from 3 to 6 mol%. The variation of the k value was explained by the suppressing effect of ZnO on the incorporation of Cr3+ ions and the distribution of Cr3+ in LN.
Xia
Hai-ping
HP
Key Laboratory of Photo-Electronic Materials, Ningbo University, Ningbo 315211, China.
Wang
Jin-hao
JH
Zeng
Xian-lin
XL
Zhang
Jian-li
JL
Zhang
Xin-min
XM
Nie
Qiu-hua
QH
D002857:Chromium / Q000032:analysis / Q000737:chemistry; D017608:Chromium Compounds / Q000032:analysis* / Q000737:chemistry; D003460:Crystallization; D007700:Kinetics; D008956:Models, Chemical; D009556:Niobium / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D015034:Zinc Oxide / Q000737:chemistry
D017608:Chromium Compounds; D010087:Oxides; D009556:Niobium; D002857:Chromium; C091692:lithium niobate; D015034:Zinc Oxide