Czochralski growth and Faraday rotation properties of Tb9.33(SiO4)6O2 crystals

Pr9.33(SiO4)6O2 Crystals: Czochralski Growth and Near UV-Visible FR Performance

“…So it seems to be that the cation vacancies are preferred at the 4f site. These conclusions from our Rietveld refinement present good agreement with previous ones found in other oxyapatite-type silicates [22][23][24]28]. MPMS-XL, San Diego, CA, USA) in the temperature range from 2 to 300 K with an applied field of 0.1 T. Faraday rotation angles of the as-grown PSO single crystal along the crystallographic c-axis were measured by using the photo-extinction technique [31] at room temperature with the average values of six data for interpretation.…”

“…So it seems to be that the cation vacancies are preferred at the 4f site. These conclusions from our Rietveld refinement present good agreement with previous ones found in other oxyapatite-type silicates [22][23][24]28]. Hexagonal, space group P6 3 /m; a = b = 9.61229(3) Å, c = 7.06561(2) Å, R wp = 6.52%.…”

“…The PSO crystal was oriented by X-ray diffraction, and the wafers, cut along the (001) crystal plane, are shown in Figure 1b. Crystals 2017, 7, 229 2 of 8 requirements for a new generation of MO materials employed in the near UV-visible spectral region, Pr9.33(SiO4)6O2 (PSO), a member of the oxyapatite-type silicate [22][23][24], which crystallizes in the hexagonal system and demonstrates great potential for application in phosphors [25] and high-power lasers [26,27], has attracted growing attention from our research team in recent years. PSO crystal melts congruently and presents strong crystallizability [28], hence, in the present investigation, we try to adopt the common RF-heating Cz-method to grow PSO crystals. The optical transmission, magnetic, and magneto-optical performances have also been discussed.…”

“…PSO crystal melts congruently and presents strong crystallizability [28], hence, in the present investigation, we try to adopt the common RF-heating Cz-method to grow PSO crystals. The optical transmission, magnetic, and magneto-optical performances have also been discussed.…”

Identification of (Tb,Eu)9.43(SiO4)6O2−δ Oxy-Apatite Structures as Nanometric Inclusions in Annealed (Eu,Tb)-Doped ZnO/Si Junctions: Combined Electron Diffraction and Chemical Contrast Imaging Studies

“…The best known are the following: the RE 2 SiO 5 orthosilicates, the RE 2 Si 2 O 7 disilicates also called pyrosilicates, and the RE silicates related to apatite structures: RE 9.33 (SiO 4 ) 6 O 2 , and RE 10 (SiO 4 ) 6 O 3 . , Disilicates are able to exhibit various polymorphs, which depend on the synthesis temperature, on the pressure, and on the chosen RE element. − At least 11 forms are known and reported with a specific nomenclature (A to I, ,, K, and X types). The apatite-type RE silicates were greatly studied in particular since cationic vacancies on one site induce free oxygen atoms leading to ionic conduction − and curiously all of them are reported with the P 6 3 / m space group, in opposite to the disilicates for which a symmetry change is observed depending on the RE element. ,− This paper follows the preliminary works of Davesnne et al , and Guillaume and deals with advanced TEM studies of annealed Eu-/Tb-codoped ZnO thin films at high temperatures typically 1100 °C to complete the nanoscale structure characterization, to identify more precisely the microstructure of the detected RE silicate inclusions, and eventually to understand the observed major changes in the luminescence properties at this extreme temperature. Especially, a crystallographic approach from precession electron diffraction tomographic (PEDT) data coupled with atomic scanning TEM (STEM)-high-angle annular dark-field (HAADF) imaging has been carried out.…”