Effect of Temperature on the Luminescence Properties of Pure and Nd3+-Doped CaMoO4 and SrMoO4 Single Crystals

Magnetic and Electrical Characteristics of Nd3+ and Mn2+-Co-doped Calcium Molybdato-Tungstates Single Crystals

“…A similar broad band is also observed for the CMNMWO single crystal with a lower concentration of Nd 3+ ions (not shown here). In this spectral range, the following charge transfer bands occur: O 2– → Mo 6+ , O 2– → Mo 5+ present in small amounts in as-grown CMNMWO single crystals, O 2– → W 6+ , O 2– → Nd 3+ as well as O 2– → Mn 2+ . – In the visible range, the bands associated with 4f–4f transitions of Nd 3+ are also observed. , Figure c shows the UV–vis spectrum of a CMNMWO single crystal ( x = 0.0098) for the [001] crystallographic direction deconvoluted into Gaussian components with the assignment of bands for Nd 3+ ions in the visible region.…”

“… 36 – 38 In the visible range, the bands associated with 4f–4f transitions of Nd 3+ are also observed. 39 , 40 Figure 2 c shows the UV–vis spectrum of a CMNMWO single crystal ( x = 0.0098) for the [001] crystallographic direction deconvoluted into Gaussian components with the assignment of bands for Nd 3+ ions in the visible region.…”

“…36−38 In the visible range, the bands associated with 4f−4f transitions of Nd 3+ are also observed. 39,40 The values of the direct band gap of CMNMWO single crystals were obtained by extrapolating a linear region of the (αhν) 2 curve obtained for both crystals as well as for [100] and [001] crystallographic directions to the photon energy axis (Figure 2b). The direct band gaps of both CMNMWO single crystals were found to be when x = 0.0050 and y = 0.0050 and for [100] crystallographic direction −1.73 eV and for [001] direction −1.72 eV; when x = 0.0098 and y = 0.0050 and for [100] −1.69 eV and for [001] −1.70 eV (Figure 2b).…”