Effect of doping of Nd3+ ions in BaO–TeO2–B2O3 glasses: A vibrational and optical study

Nanda, Kirti; Berwal, Neelam; Kundu, R. S.; Punia, R.; Kishore, N.

doi:10.1016/j.molstruc.2015.02.021

Cited by 59 publications

(13 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, it may be concluded that the direct transition is most probable transition in the present glass system. The values of fitting parameters , Γ 1 , Γ , and are in good agreement as reported earlier [22,[25][26][27][28][29]. Perusal of the data presented in Table 2 shows that the linewidth of continuum (Γ ) in conduction band is larger than that of the crystalline materials, as reported in literature, which may be due to amorphous nature of the present glass system.…”

Section: Resultssupporting

confidence: 90%

“…Perusal of the data presented in Table 2 shows that the linewidth of continuum (Γ ) in conduction band is larger than that of the crystalline materials, as reported in literature, which may be due to amorphous nature of the present glass system. The small values of exciton binding energy ( ), listed in Table 2, lead to increase in the spatial separation between the electron and hole reducing the coulomb interaction between them [26,29].…”

Section: Resultsmentioning

confidence: 99%

“…Intrinsic parameters such as band gap and excitonic binding energy can be determined by fitting the absorption spectrum with an appropriate analytical model. The absorption coefficient ( ) introduced by Elliott-Washington model for hydrogenic excitons [HEM] is given as[24][25][26][27][28][29]…”

mentioning

confidence: 99%

See 2 more Smart Citations

Optical Characterization of Zinc Modified Bismuth Silicate Glasses

Parmar

Hooda

Kundu

et al. 2015

International Journal of Optics

Self Cite

View full text Add to dashboard Cite

The optical characterization of glass samples in the system 40SiO2·xZnO · (60-x)Bi2O3withx=0, 5, 10, 15, 20, 25, 30, 35, and 40 prepared by conventional melt-quench technique has been carried out in the light of Hydrogenic Excitonic Model (HEM). The absorption coefficient spectra show good agreement with theoretical HEM for the present glass system and the values of different parameters likeEg,R,Γ1,Γc, andCohave been estimated from fitting of this model. The values of energy band gap estimated from fitting of HEM with experimental data are in good agreement with those obtained from Tauc’s plot for direct transitions. The band gap energy is found to increase with increase of ZnO content. The decrease in values of Urbach energy with increase in ZnO content indicates a decrease in defect concentration in the glass matrix on addition of ZnO content. Optical constantsnandkobeyk-kconsistency and the dielectric response of the studied glass system is similar to that obtained for Classical Electron Theory of Dielectric Materials. The calculated values of the metallization criterion (M) show that the synthesized glasses may be good candidates for new nonlinear optical materials.

show abstract

Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Optical Characterization of Zinc Modified Bismuth Silicate Glasses

Parmar

Hooda

Kundu

et al. 2015

International Journal of Optics

Self Cite

View full text Add to dashboard Cite

show abstract

“…The band at ~ 1362 cm −1 is generally due to B-O stretch in BO 4 units from varied borate groups [34,38]. Raman peak at ~ 1437 cm −1 is attributed to stretching vibrations of BO 3 triangles with large segment of borate network [39,40]. From Raman spectra analysis, it is clearly observed that the absence of the peak at 805 cm −1 concluded the absence of boroxol rings and existence of AlO 4 and BO 3 units observed at ~ 791 cm −1 and ~ 1533 cm −1 , respectively.…”

Section: Raman Studiesmentioning

confidence: 99%

EPR, optical, physical and structural studies of strontium alumino-borate glasses containing Cu2+ ions

Ahmed

Shareefuddin

2019

SN Appl. Sci.

View full text Add to dashboard Cite

Glass composition (30 − x) SrO-xAl 2 O 3-69.5B 2 O 3-0.5CuO (0 ≤ x ≤ 15 mol%) captioned as SABC was prepared by the conventional melt quenching technique. Peak-free X-ray diffractograms and homogeneous plain SEM image confirm the glassy nature of the prepared samples. EPR and optical absorption spectral studies were carried out to understand the effect of modifier oxide (SrO) and transition metal (TM) ion Cu 2+ in the glass network. From the EPR spectra, spin-Hamiltonian parameters were evaluated. It was observed that g ∥ > g ⊥ > g e and A ∥ > A ⊥ suggest that the ground state of Cu 2+ is d x 2 −y 2 (2 B 1g state) and the site symmetry around Cu 2+ is tetragonally distorted octahedral. The optical absorption spectra revealed a broad absorption for all the glass samples. This band is assigned to 2 B 1g → 2 B 2g transition. From optical absorption spectra, optical band gap and Urbach energy values were calculated. The FTIR and Raman spectral studies showed that the glass network consists of BO 3 and BO 4 structural units.

show abstract

“…Due to its high transparently, low melting point, high thermal stability, different coordination numbers and strong solubility of rare-earth ions, borate glass is an especially suitable optical medium [15,16]. In addition, RE-doped alkali borate glasses are interesting for the study of the effects of alkali ions, especially around rare-earth ions, on the glass forming network.…”

Section: Introductionmentioning

confidence: 99%

Structural role of Nd2O3 as a dopant material in modified borate glasses and glass ceramics

Shaalan

El-Damrawi

Hassan

et al. 2021

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Glasses in the system xNd 2 O 3 -(46-x)B 2 O 3 -27CaO-24.4Na 2 O-2.6 P 2 O 5 (0 ≤ x ≤ 4 mol%) have been prepared via conventional melt quenching technique. X-ray diffraction (XRD) spectra have showed that the amorphous structure is dominant in glasses of Nd 2 O 3 concentrations ≤ 0.5 mol%. But formation of a more ordered structure is con rmed at higher Nd 2 O 3 values. Result based on differential scanning calorimetry (DSC) shows an increase in glass transition temperature (T g ) with increasing Nd 2 O 3 at expense of B 2 O 3 contents. Vicker hardness (H v ) and density (D) are used to correlate the glass structure with its properties. The measured density is found to be increased whereas the molar volume is decreased with increasing Nd 2 O 3 content. The calculated molar volume (V m ) and free spaces (V f ) are both decreased due to lling process which is suggested to be carried out by Nd 3+ of larger size than that of B 3+ . Decreasing of V m and V f can re ect the increase in bridging bonds in the glass network which in turns results in increasing of both T g and of the investigated compositions.

show abstract

Effect of doping of Nd3+ ions in BaO–TeO2–B2O3 glasses: A vibrational and optical study

Cited by 59 publications

References 50 publications

Optical Characterization of Zinc Modified Bismuth Silicate Glasses

Optical Characterization of Zinc Modified Bismuth Silicate Glasses

EPR, optical, physical and structural studies of strontium alumino-borate glasses containing Cu2+ ions

Structural role of Nd2O3 as a dopant material in modified borate glasses and glass ceramics

Contact Info

Product

Resources

About