Mössbauer and vibrational spectra of sodium borosilicate glasses containing europium or tin ions

Musić, Svetozar; Bajs, Z.; Furić, Krešimir; Mohaček, Vlasta

doi:10.1007/bf00724772

Cited by 13 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1][2][3][4] The separation of the contribution of the broadening to the observed peak width from the contribution of the unresolved quadrupole splitting is an open question in glasses containing Eu 3ϩ . This problem has been treated for Eu 2ϩ in amorphous EuFe 2 Si 2 , where the full width at half maximum ͑FWHM͒ of the absorption peak is around 7 mm/s; 5 the authors fitted the absorption peak using a convolution of Lorentzian multiplets, corresponding to a distribution of the quadrupole interaction ͑QI͒ parameter or to a distribution of the asymmetry parameter.…”

Section: Introductionmentioning

confidence: 99%

Hyperfine interactions at europium sites in oxide glasses

Concas¹,

Congiu²,

Muntoni³

et al. 1996

Phys. Rev. B

View full text Add to dashboard Cite

The shape of the ␥ resonance absorption peak of the Eu 3ϩ ion in a disordered structure was investigated in some phosphate, borate, and silicate glasses by using 151 Eu Mössbauer spectroscopy. The quality of the fits was tested by using the Durbin-Watson d statistics. The observed full width at half maximum of the peak was resolved in a contribution of the broadening and a contribution of the quadrupole splitting, due to the distortion of the Eu site compared to a cubic symmetry. The Eu-O bond was found to have a covalent admixture with 6s character. The axial component of the electric-field gradient at the Eu site was found to be correlated with the optical basicity of the glass.

show abstract

Section: Introductionmentioning

confidence: 99%

Hyperfine interactions at europium sites in oxide glasses

Concas¹,

Congiu²,

Muntoni³

et al. 1996

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…The shift is close to that of Eu

_{2}

_{3}

[110], suggesting that Eu

^{3 +}

ions locate in sites similar to those in Eu

_{2}

_{3}

. Musić et al [111] obtained similar values for the isomer shift of Eu

^{3 +}

in sodium borosilicate glasses.…”

Section: Materials Overviewmentioning

confidence: 52%

Characterization of Luminescent Materials with 151Eu Mössbauer Spectroscopy

Steudel

Johnson

et al. 2018

Materials

View full text Add to dashboard Cite

The application of Mössbauer spectroscopy to luminescent materials is described. Many solids doped with europium are luminescent, i.e., when irradiated with light they emit light of a longer wavelength. These materials therefore have practical applications in tuning the light output of devices like light emitting diodes. The optical properties are very different for the two possible valence states Eu2+ and Eu3+, the former producing ultraviolet/visible light that shifts from violet to red depending on the host and the latter red light, so it is important to have a knowledge of their behavior in a sample environment. Photoluminescence spectra cannot give a quantitative analysis of Eu2+ and Eu3+ ions. Mössbauer spectroscopy, however, is more powerful and gives a separate spectrum for each oxidation state enabling the relative amount present to be estimated. The oxidation state can be identified from its isomer shift which is between −12 and −15 mm/s for Eu2+ compared to around 0 mm/s for Eu3+. Furthermore, within each oxidation state, there are changes depending on the ligands attached to the europium: the shift is more positive for increased covalency of the bonding ligand X, or Eu concentration, and decreases for increasing Eu–X bond length.

show abstract

“…Some previous Mössbauer investigations of trivalent europium in glasses did not determine the contribution of the quadrupolar interaction to the observed spectra [8][9][10][11]. This problem has been investigated for EU 2+ in amorphous EuFe 2 Si 2 by Hodges et al, who fitted the spectrum using a convolution of Lorentzian multiplets [12].…”

Section: Introductionmentioning

confidence: 99%

Hyperfine Interactions at Lanthanide Sites in Europium Doped Oxide Glasses

Concas

Congiu

Spano

et al. 2000

Zeitschrift Für Naturforschung A

View full text Add to dashboard Cite

A series of europium doped Na 2 0-B 2 0 3 -Si0 2 , Pb0-Ge0 2 and Zn0-Te0 2 glasses was investigated by means of 5l Eu Mössbauer spectroscopy. The distortion of the Eu sites has been evaluated in the Na 2 0-B 2 0 3 -Si0 2 glasses by means of the quadrupolar interaction parameter and the asymmetry parameter; the disorder has been estimated by the line width. The occupancy of the sites in the borosilicate glasses is discussed. The correlation of the isomer shift with the optical basicity of the glass is discussed in terms of the degree of covalence of the Eu-0 bond.

show abstract

Mössbauer and vibrational spectra of sodium borosilicate glasses containing europium or tin ions

Cited by 13 publications

References 27 publications

Hyperfine interactions at europium sites in oxide glasses

Hyperfine interactions at europium sites in oxide glasses

Characterization of Luminescent Materials with 151Eu Mössbauer Spectroscopy

Hyperfine Interactions at Lanthanide Sites in Europium Doped Oxide Glasses

Contact Info

Product

Resources

About