EPR and optical spectroscopy of the Yb3+ cubic center in β-PbF2

Gerasimov, K. I.; Leushin, A. M.; Falin, M. L.

doi:10.1134/1.1402222

Cited by 11 publications

(16 citation statements)

References 15 publications

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“…The obtained parameters (g-factor and and hyperfine splitting parameters for both isotopes) are close to those reported for Yb 3 + ions in eight-fold environment (see, for example refs. [20,21]), in agreement with the substitution of Yb 3 + ions in the Li 6 Y(BO 3 ) 3 matrix. EPR spectrum observed in powder obtained from a crushed single crystal is displayed in Figure 7.…”

Section: Epr Measurementssupporting

confidence: 75%

Correlation between Luminescence and EPR Spectroscopy as Evidence of Ytterbium Pair Formation in Li₆Ln(BO₃)₃:Yb³⁺ (Ln=Gd, Y) Borate Single Crystals

et al. 2011

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Synthesized powders and grown single crystals of nominal compositions Li(6)Ln(BO(3))(3):Yb(3+) (Ln=Y, Gd) were investigated by means of powder and single-crystal X-ray diffraction (XRD), as well as optical near-IR spectroscopy in conjunction with electron paramagnetic resonance (EPR) spectroscopy. The appearance of two distinct zero-phonon lines suggests the existence of two kinds of Yb(3+) ions in the single crystals. The XRD results exclude the possibility of a phase transition occurring between room and low temperatures. EPR spectra of single crystals show the presence of both isolated ions and pairs of ytterbium ions substituted for Y(3+). A strong temperature dependence of the intensity of Yb-Yb pairs resonance lines coincides with temperature dependence of emission peak at 978 nm, confirming a common origin of the defect giving rise to these spectra. Calculated from EPR spectra, the distance between pairs of Yb(3+) is in good agreement with crystallographic ones: R=3.856 Å, R(cryst) =3.849 Å.

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Section: Epr Measurementssupporting

confidence: 75%

Correlation between Luminescence and EPR Spectroscopy as Evidence of Ytterbium Pair Formation in Li₆Ln(BO₃)₃:Yb³⁺ (Ln=Gd, Y) Borate Single Crystals

et al. 2011

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“…Nonetheless, the correlation between the EPR and optical results is not always obvious [15]. In β-PbF 2 bulk single crystals doped with YbF 3 , EPR only evidences Yb 3+ in cubic symmetry, with a g-factor of 3.434 [16]. Nonetheless, the optical spectra exhibit more bands than expected for only one occupied site [15,16].…”

Section: Introductionmentioning

confidence: 91%

EPR and optical study of Yb³⁺-doped β-PbF₂single crystals and nanocrystals of glass-ceramics

Dantelle

Mortier²,

Goldner

et al. 2006

J. Phys.: Condens. Matter

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β-PbF2 single crystals doped with YbF3 (0.2% and 2%) were studied by x-ray diffraction (XRD), electron paramagnetic resonance (EPR) and optical spectroscopy. EPR revealed the presence of only one kind of paramagnetic ion Yb3+, in a cubic symmetry site. The optical absorption, emission and excitation spectra enabled us to identify the transitions attributed to Yb3+ in the cubic site and to determine its energy level diagram. Site-selective laser spectroscopy also evidenced the presence of another type of Yb3+ ions, undetectable by classical EPR. This second type, which dominates in the 2%-doped crystal and exhibits cooperative luminescence, was attributed to Yb3+ ions forming clusters. Transparent oxyfluoride glass-ceramics, containing β-Pb1−yYbyF2+y nanocrystallites, were also synthesized and studied by XRD, EPR and optical spectroscopy. Two types of Yb3+ ions were found, as in β-PbF2 single crystals. The optical properties of the oxyfluoride glass-ceramics turn out to be similar to those of ytterbium activated β-PbF2 single crystals. Moreover, the Yb environments found in PbF2 single crystals seem to already occur in the parent glass. Therefore, these materials are expected to be good laser media, like the rare-earth doped fluorite crystals, either in bulk or fibre form.

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“…13 This indicates that the vibronic mechanism for the intensity of the electric dipole optical transitions of rare-earth dopants in the PbF 2 is quite common. 13 This indicates that the vibronic mechanism for the intensity of the electric dipole optical transitions of rare-earth dopants in the PbF 2 is quite common.…”

Section: B Vibronic Contribution To the Strength Of The Weak Emissiomentioning

confidence: 97%

Eu 3 + as a probe for rare-earth dopant site structure in nano-glass-ceramics

Driesen¹,

Tikhomirov²,

Görller‐Walrand³

2007

Journal of Applied Physics

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Local order around rare earth ions during the devitrification of oxyfluoride glasses Zeeman splitting and confinement effects in Er 3 + -doped nano-glass-ceramics in magnetic fields up to 50 T Eu 3+ -doped transparent nano-glass-ceramics, 32͑SiO 2 ͒9͑AlO 1.5 ͒31.5͑CdF 2 ͒18.5͑PbF 2 ͒ 5.5͑ZnF 2 ͒ : 3.5͑EuF 3 ͒mol %, have been prepared aiming at the investigation of the site structure of the Eu 3+ rare-earth dopant. In this nano-glass-ceramic host, other rare-earth dopants, such as Er 3+ , Tm 3+ , Ho 3+ , and Dy 3+ , also have served as a dopant; however the Eu 3+ ion is a preferably sensitive probe for a rare-earth dopant site structure due to its unique purely magnetic and purely electric dipole moment optical transitions involving the nondegenerate excited 5 D 0 and ground 7 F 0 states. The splitting in the respective emission and absorption spectra in the crystalline field of the nano-glass-ceramics and its parent glass has been studied. It has been concluded that the major site of the rare-earth dopant in the nano-glass-ceramics is nearly cubic, with an orthorhombic distortion according to the sequence O h → D 4h → D 2h , and the majority of the rare-earth dopants substitute onto the Pb 2+ site in the PbF 2 nanocrystals embedded in the glass network. A vibronic contribution to the strength of the 5 D 0 → 7 F 2 electric dipole moment transition has been found and the respective dominating contributing vibration mode has been proposed to be and to change as a 2u → b 1u → a u , according to lowering the site symmetry in a sequence O h → D 4h → D 2h .

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EPR and optical spectroscopy of the Yb3+ cubic center in β-PbF2

Cited by 11 publications

References 15 publications

Correlation between Luminescence and EPR Spectroscopy as Evidence of Ytterbium Pair Formation in Li₆Ln(BO₃)₃:Yb³⁺ (Ln=Gd, Y) Borate Single Crystals

Correlation between Luminescence and EPR Spectroscopy as Evidence of Ytterbium Pair Formation in Li₆Ln(BO₃)₃:Yb³⁺ (Ln=Gd, Y) Borate Single Crystals

EPR and optical study of Yb³⁺-doped β-PbF₂single crystals and nanocrystals of glass-ceramics

Eu 3 + as a probe for rare-earth dopant site structure in nano-glass-ceramics

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EPR and optical spectroscopy of the Yb3+ cubic center in β-PbF2

Cited by 11 publications

References 15 publications

Correlation between Luminescence and EPR Spectroscopy as Evidence of Ytterbium Pair Formation in Li6Ln(BO3)3:Yb3+ (Ln=Gd, Y) Borate Single Crystals

Correlation between Luminescence and EPR Spectroscopy as Evidence of Ytterbium Pair Formation in Li6Ln(BO3)3:Yb3+ (Ln=Gd, Y) Borate Single Crystals

EPR and optical study of Yb3+-doped β-PbF2single crystals and nanocrystals of glass-ceramics

Eu 3 + as a probe for rare-earth dopant site structure in nano-glass-ceramics

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Correlation between Luminescence and EPR Spectroscopy as Evidence of Ytterbium Pair Formation in Li₆Ln(BO₃)₃:Yb³⁺ (Ln=Gd, Y) Borate Single Crystals

Correlation between Luminescence and EPR Spectroscopy as Evidence of Ytterbium Pair Formation in Li₆Ln(BO₃)₃:Yb³⁺ (Ln=Gd, Y) Borate Single Crystals

EPR and optical study of Yb³⁺-doped β-PbF₂single crystals and nanocrystals of glass-ceramics