Optical and X-ray photoelectron spectroscopy of PbGeO3 and Pb5Ge3O11 single crystals
Source abstract
Abstract
Pb5Ge3O11 crystals are found to exhibit pale yellow colouration while PbGeO3 are colourless. X-ray photoelectron spectroscopy (XPS) measurements show lead deficiency in both the crystals. The results also reveal a stronger ionic character for PbGeO3 as compared to Pb5Ge3O11 crystal. The binding energy of Ge3d core level in the case of Pb5Ge3O11 crystal is found to be smaller than the binding energy of germanium oxide, thereby indicating the incomplete oxidation of Ge ions in the crystal lattice. On gamma ray irradiation, the transmission of both the crystals is observed to deteriorate uniformly over the entire wavelength range, which has been attributed to the oxidation of some of the lattice Pb ions. On gamma irradiation the changes observed in O1s core level energies for both the crystals are seen to be consistent with the changes noted in the Pb4f7/2 and Ge3d spectra. Interestingly, the results reveal oxidation of surface Ge atoms with atmospheric oxygen under gamma irradiation.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Photorefractive and Nonlinear Optics · Luminescence Properties of Advanced Materials · Glass properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
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1. Bichard V M, Davies P H, Hulme K F, Jones G R and Robertson D S 1972 J. Phys. D: Appl. Phys. 5 212410.1088/0022-3727/5/11/320 ↗
2. Bush A A and Venevtsev Yu N 1979 Sov. Phys. Crystall. 24 602
3. Goswami Nanda M L, Choudhary R N P and Mahapatra P K 1998 J. Phys. Chem. Solids 59 104510.1016/S0022-3697(98)00022-5 ↗
4. Houlton M R, Jones G R and Robertson D S 1975 J. Phys. D: Appl. Phys. 8 21910.1088/0022-3727/8/3/005 ↗
5. Iwasaki H, Sugii K and Miyazawa S 1971a Mater. Res. Bull. 6 50310.1016/0025-5408(71)90038-9 ↗
6. Iwasaki H, Sugii K, Yamada T and Nilzeki M 1971b Appl. Phys. Lett. 18 44410.1063/1.1653487 ↗
7. Iwasaki H, Miyazawa S, Koizumi H, Sugii K and Niizeki N 1972 J. Appl. Phys. 43 490710.1063/1.1661044 ↗
8. Iwata Y 1977 J. Phys. Soc. Jpn 43 96110.1143/JPSJ.43.961 ↗
9. Landolt-Börnstein 1982 Ferroelectrics and related substances: oxides (Berlin: Springer-Verlag) Vol. 16
10. Morris P A 1990 J. Cryst. Growth 106 7610.1016/0022-0248(90)90289-W ↗
11. Moulder J F, Stickle W F, Sobol P E and Bomben K D 1992 Handbook of X-ray photoelectron spectroscopy (Minnesota, USA: Perkin-Elmer Corp.)
12. Newnham R E, Wolfe R W and Darlington C N W 1973 J. Solid State Chem. 6 37810.1016/0022-4596(73)90226-0 ↗
13. Otto H H, Stock M and Gebhardt W 1980 Ferroelectrics 25 54310.1080/00150198008207066 ↗
14. Reyher H J, Pape M and Hausfeld N 2001 J. Phys.: Condens. Matter 13 3767
15. Sabharwal S C and Sangeeta 1999 J. Cryst. Growth 200 19110.1016/S0022-0248(98)01275-5 ↗
16. Sabharwal S C, Sangeeta, Desai D G, Karandikar S C, Chauhan A K, Sangiri A K, Keshwani K S and Ahuja M N 1996 J. Cryst. Growth 169 30410.1016/S0022-0248(96)00387-9 ↗
17. Sabharwal S C, Sangeeta and Desai D G 2006 Cryst. Growth & Des. 6 5810.1021/cg0495678 ↗
18. Sangeeta and Sabharwal S C 2008 J. Cryst. Growth 310 289910.1016/j.jcrysgro.2008.01.048 ↗
19. Tabet N, Faiz M, Hamdan N M and Hussain Z 2003 Surf. Sci. 523 6810.1016/S0039-6028(02)02354-3 ↗
20. Talik E, Adamiec M and Molak A 2006 Mater. Sci.-Poland 24 714
21. Watton R, Smith C and Jones G R 1976 Ferroelectrics 14 71910.1080/00150197608236709 ↗
22. Yue X, Mendricks S, Hu Y, Hesse H and Kip D 1998 J. Appl. Phys. 83 347310.1063/1.366628 ↗