C. F. Meyers Der Heilige

Böker, Uwe

doi:10.1080/00393276708587373

Cited by 1 publication

(1 citation statement)

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“…(3) When Mg doping is above the threshold, is Fe substituting for Li or Nb? As shown in recent ESR measurements of Fe3+ in Mg, Fe-doped LiNbO, [12], each pair of Fe occupies equally a Li site and a Nb site when the Mg doping is above threshold,…”

Section: The Infruence Of Nd Doping On the Iattice Environment In Linbomentioning

confidence: 79%

Photoconductivity of Nd, Mg-Doped LiNbO3 Crystals

Feng

Lian-An

et al. 1990

phys. stat. sol. (a)

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Optical absorption spectra, OH infrared absorption bands, ESR spectra of Fe3+ ions, and photoconductivities of a group of LiNbO3 crystals, including nominaly undoped LiNbO3, LiNbO3:6 mol% MgO and LiNbO3:6 mol% MgO + 0.5 mol% Nd2O3 crystals, are measured at room temperature. OH band and ESR measurements show that Nd doping will not directly influence the Mg doping concentration threshold effect and the site of incorporation of Fe ions in LiNbO3: Mg. This conclusion is demonstrated by experimental photoconduction results. When no external electric field is applied the photovoltaic current density in LiNbO3: Mg, Nd is larger than that in undoped and Mg‐doped LiNbO3 at some wavelengths owing to the larger optical absorption coefficient. Besides, the effect of UV irradiation on the photoconduction in doped LiNbO3 crystals is observed experimentally. The photoconduction in LiNbO3:6mol% MgO will increase after the UV irradiation, but no change is observed in LiNbO3: Mg, Nd crystals. By means of defect chemistry calculations of the threshold effect in Mg‐doped LiNbO3 crystals according to the nature of substitution of Nd ions in the Mg‐doped crystals, the experimental results are discussed.

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Section: The Infruence Of Nd Doping On the Iattice Environment In Linbomentioning

confidence: 79%