Family of paramagnetic centers of Ce3+ ions in yttrium aluminum garnet

Asatryan, Georgi; Kramushchenko, D. D.; Uspenskaya, Yu. A.; Баранов, П. Г.; Պետրոսյան, Ա. Գ.

doi:10.1134/s1063783414060031

Cited by 22 publications

(11 citation statements)

References 13 publications

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“…The determined principal components of the g-tensor for the La0.03YAG sample are = 2.750, = 1.860 and = 0.898. These values are in a good agreement with the reported values of 2.74, 1.87 and 0.91 for Ce 3+ in YAG single crystals [42][43][44]. Cerium ions reside in D 2 symmetry Y 3+ sites of the YAG lattice [42,43], which explains the low symmetry nature of the EPR spectrum.…”

Section: Resultssupporting

confidence: 91%

Investigation of lanthanum substitution effects in yttrium aluminium garnet: importance of solid state NMR and EPR methods

Laurikenas

Sakalauskas

Maršalka

et al. 2020

J Sol-Gel Sci Technol

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In this study yttrium aluminium garnet (YAG) specimens in which yttrium was partially substituted by lanthanum Y3-xLaxAl5O12 (YLaAG) were prepared by an aqueous sol-gel method. The resulting sol was concentrated by slow solvent evaporation at 65 oC. The obtained gels were dried in an oven at 120 oC for 24 h. The obtained precursor gel powders were calcined at 800 oC and 1000 oC in air. YLaAG samples were analyzed by X-ray diffraction (XRD), solid state nuclear magnetic resonance (NMR), scanning electron microscopy (SEM) and electron paramagnetic resonance (EPR) methods. Luminescence measurements of YLaAG samples were also recorded. The XRD analysis results showed that only low substitution of yttrium by lanthanum is possible in Y3-xLaxAl5O12 without destroying garnet crystal structure. It was also demonstrated in this study, that solid state NMR and EPR methods are indispensable tools for the explanation of processes and properties observed in the newly synthesized Y3-xLaxAl5O12 compounds.

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Section: Resultssupporting

confidence: 91%

Investigation of lanthanum substitution effects in yttrium aluminium garnet: importance of solid state NMR and EPR methods

Laurikenas

Sakalauskas

Maršalka

et al. 2020

J Sol-Gel Sci Technol

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“…As is seen, the equidistance of the hyperfine components still persisting up to 70°s hould be fully violated at 90°. Similar violation of equidistance at highly anisotropic hyperfine constants and angles θ > 80° was experimentally observed for Dy 3+ ions in yttrium-aluminum garnet [10].…”

Section: Resultssupporting

confidence: 58%

Electron paramagnetic resonance of Dy3+ ions in lead thiogallate single crystals

et al. 2012

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The results of electron paramagnetic resonance (EPR) studies of Dy 3+ ions in lead thiogallate PbGa 2 S 4 single crystals have been presented. It has been shown that the ground state of these ions corre sponds to the lowest Stark sublevel Γ 6 of the term 6 H 15/2 . The spectra are well described by the axially sym metric spin Hamiltonian with the effective spin S = 1/2 with the factors g || = 15.06 and g ⊥ = 2.47. The Dy 3+ ions substitute Pb 2+ ions in the crystal lattice of PbGa 2 S 4 . The observed hyperfine structure has allowed to unambiguously interpret the EPR spectra. The hyperfine interaction constants of two odd isotopes of dyspro sium in lead thiogallate single crystals have been found to be A || = 675 × 10 -4 cm -1 and A ⊥ = 111 × 10 ⎯4 cm -1 for 163 Dy and A || = 472 × 10 -4 cm -1 and A ⊥ = 77 × 10 -4 cm -1 for 161 Dy.

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“…The lowest Ce 3? state can be described by the effective spin S* = 1/2 and an anisotropic g factor [27,28]. There exist six magnetically non-equivalent Ce 3?…”

Section: Resultsmentioning

confidence: 99%

The Gd–Ce Cross-Relaxation Effects in ODMR via Ce3+ Emission in Garnet Crystals

et al. 2016

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Electron paramagnetic resonance (EPR) in the ground state of Gd 3? ions in (LuGd) 3 Al 5 O 12 single crystals has been found by monitoring the Ce 3? photoluminescence intensity under circularly polarized excitation in the presence of the 35 GHz microwave field. Due to spin selection rules for optical transitions, the circularly polarized excitation allowed monitoring the populations of the Ce 3? ground-state spin sublevels, which can be changed at the EPR of Gd 3? due to GdCe cross relaxation.

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Family of paramagnetic centers of Ce3+ ions in yttrium aluminum garnet

Cited by 22 publications

References 13 publications

Investigation of lanthanum substitution effects in yttrium aluminium garnet: importance of solid state NMR and EPR methods

Investigation of lanthanum substitution effects in yttrium aluminium garnet: importance of solid state NMR and EPR methods

Electron paramagnetic resonance of Dy3+ ions in lead thiogallate single crystals

The Gd–Ce Cross-Relaxation Effects in ODMR via Ce3+ Emission in Garnet Crystals

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