BaWO4: Pr single crystals co-doped with Na

Kaczmarek, S.M.; Witkowski, Marcin E.; Głowacki, M.; Leniec, Grzegorz; Berkowski, M.; Kowalski, Zbigniew W.; Makowski, Michał; Drozdowski, Winicjusz

doi:10.1016/j.jcrysgro.2019.125264

Cited by 6 publications

(10 citation statements)

References 21 publications

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“…Ce, 2.0% at. Na [17][18][19][20]. One of these centers is the strongest and occurs in all four monocrystals.…”

Section: Introductionmentioning

confidence: 89%

“…In this paper, we choose to use superposition model (SPM) to obtain structural information on trivalent cerium ion (Ce 3+ ) and its surroundings. Our investigations were focused on the most intense paramagnetic centers with axial symmetry presented in all four BaWO4 single crystals doped with Ce and co-doped with Na [17][18][19]. Obtained results will be compared with our previous results and other investigations.…”

Section: Introductionmentioning

confidence: 89%

“…Rare-earth ions (like Ce 3+ ) substitute Ba 2+ site in the elementary cell of the barium tungstate (BaWO 4 ) [17][18][19][20]25,26,38]. The local symmetry of the Ce Ba site (Ba 2+ place occupied by Ce 3+ ) is S 4 (tetragonal symmetry).…”

Section: Calculationsmentioning

confidence: 99%

“…Hence, two ReBa substitutions gives two The present paper is a continuation of our research on the local structure of the BaWO 4 single crystals doped and co-doped with ions of various elements. There are a few papers that have been investigating a local structure of BaWO 4 single crystals doped and co-doped with, Ce, Na, Pr using EPR method [17][18][19]. Five paramagnetic centers with axial symmetry and about ten centers with low symmetry (C 2 ) were found [17,18].…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Investigation of the EPR G-Factor for the Axial Symmetry Ce3+ Center in the BaWO4 Single Crystal

Bodziony

Kaczmarek

2021

Crystals

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The parameters g-factor (g|| and g⊥) together with the local structure of the Ce3+ center in BaWO4 single crystal (scheelite structure crystals) were theoretically investigated using a complete diagonalization procedure of energy matrix (CDM method). The intrinsic parameters were calculated. It is shown that the experimental and the calculated values of the g-factors are in good agreement. The angular distortion has also been calculated. It was found that the polar angles of the impurity–ligand bonding are smaller than in BaWO4 single crystal (Δθ≈1.00 ) . The validity of the results and the changing in the local environment of the impurity–cerium ion is also discussed.

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“…Ce, 2.0% at. Na [17][18][19][20]. One of these centers is the strongest and occurs in all four monocrystals.…”

Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 89%

Section: Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Theoretical Investigation of the EPR G-Factor for the Axial Symmetry Ce3+ Center in the BaWO4 Single Crystal

Bodziony

Kaczmarek

2021

Crystals

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“…The hypothesis of Codoping of Eu 3+ and Na + at Ca 2+ sites were verified, too [6]. Kaczmarek et al published another paper about Pr 3+ and Na + sites in BaWO 4 single crystals doped with Pr and codoped with Na [7].…”

Section: Introductionmentioning

confidence: 90%

Structural Analysis of the BaWO4 Crystal Doped with Ce and Codoped with Na Ions Based on g-shift Parameters

Bodziony

Kaczmarek

2020

Crystals

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The relationship between the g-shift and the local structure of the Ce3+ paramagnetic center with axial symmetry were investigated for four BaWO4 single crystals doped with Ce and codoped with Na. Based on g-shift the displacements of Ce3+ ions are determined. The g-shift method yields displacements of impurity ions in good agreement with the superposition model (SPM) and the perturbation methods (PM) predictions. The structural analysis of the paramagnetic ions and its surrounding in the BaWO4 unit cell was also conducted.

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Synthesis and characterization of BaWO4:xTm3+,yPr3+ obtained by ultrasonic spray pyrolysis

Santiago

Macedo

Oliveira

et al. 2020

J Mater Sci: Mater Electron

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In the present paper, BaWO 4 :xTm 3+ ,yPr 3+ samples were synthesized by the ultrasonic spray pyrolysis process and the effect of doping on the structural and optical properties were analyzed. All XRD patterns were indexed by the scheelitetype tetragonal structure, without the presence of secondary phases, suggesting success in the Tm 3+ and Pr 3+ doping. The FESEM images showed than particles have sphere-like morphology with the presence of holes, irregularity, and pores on their surfaces. The bandgap of the BaWO 4 :xTm 3+ ,yPr 3+ sample varied between 5.50 and 5.58 eV. The doping of Tm 3+ and Pr 3+ resulted in a reduction in the photocatalytic activity can be linked to a decrease of effective masses ratio electron/hole and an increase in the recombination rate.

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BaWO4: Pr single crystals co-doped with Na

Cited by 6 publications

References 21 publications

Theoretical Investigation of the EPR G-Factor for the Axial Symmetry Ce3+ Center in the BaWO4 Single Crystal

Theoretical Investigation of the EPR G-Factor for the Axial Symmetry Ce3+ Center in the BaWO4 Single Crystal

Structural Analysis of the BaWO4 Crystal Doped with Ce and Codoped with Na Ions Based on g-shift Parameters

Synthesis and characterization of BaWO4:xTm3+,yPr3+ obtained by ultrasonic spray pyrolysis

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