Hostname: page-component-848d4c4894-wg55d Total loading time: 0 Render date: 2024-05-01T02:16:00.962Z Has data issue: false hasContentIssue false
  • English
  • Français

Evidence for Local Atomic Strain in Pb-Doped Heavy-Metal Fluoride Glasses

Published online by Cambridge University Press:  10 February 2011

L. Niu ,
A. R. Kortan ,
N. Kopylov  and
P. H. Citrin
L. Niu
Affiliation:
AT&T Bell Laboratories, Murray Hill, NJ 07974
A. R. Kortan
Affiliation:
AT&T Bell Laboratories, Murray Hill, NJ 07974
N. Kopylov
Affiliation:
AT&T Bell Laboratories, Murray Hill, NJ 07974
P. H. Citrin
Affiliation:
AT&T Bell Laboratories, Murray Hill, NJ 07974
Get access

Abstract

Near-edge and extended x-ray absorption fine structure (NEXAFS and EXAFS) measurements have been made as a function of Pb dopant concentration to study the changes in local geometric and electronic structure in several heavy-metal fluoride glasses (Zr/Ba/La/Al/Na, or ZBLAN). A strong correlation is found between the observed glass instability for Pb concentrations > 10% and the structural changes that are measured exclusively around the Ba atoms. Implications of these novel findings are examined in light of the present understanding of these complex glass systems.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 417: Symposium EE – Optoelectronic Materials-Ordering, Composition Modulation, and Self-Assembled … , 1995 , 175
Copyright
Copyright © Materials Research Society 1996

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. For a general review, see Fluoride Glass Optical Fibers 48, edited by France, P. W., Drexhage, M. G., Parker, J. M., Moore, M. W., Carter, S. F. and, Wright, J. V., Blackie (Glasgow, 1990).Google Scholar
2. See, for example, Proceedings of the 9th International Symposium on Non-oxide Glasses, Hangzhou, China, J. Non-Crystal. Solids 184, 1 (1995).Google Scholar
3. Fujiura, K., Kanamori, T., Ohishi, Y., Terunuma, Y., Sudo, S., Sugii, K., Appl. Phys. Lett. 67, 3063 (1995).Google Scholar
4. Lee, P. A., Citrin, P. H., Eisenberger, P., and Kincaid, B. M., Rev. Mod. Phys. 53, 769 (1981).Google Scholar
5. Near-edge x-ray absorption fine structure (NEXAFS) is also referred to as x-ray absorption nearedge structure (XANES). See, for example, X-ray Absorption: Principles. Applications. Techniques of EXAFS. SEXAFS. and XANES, edited by Koningsberger, D. C. and Prins, R. (Wiley, New York, 1988).Google Scholar
6. MacDowell, A.A., Hashizume, T., and Citrin, P.H., Rev. Sci. Instrum. B 60, 1901 (1989).Google Scholar
7. Schuppler, S., Pfeiffer, L. N., West, K. W., and Citrin, P. H., Phys. Rev. B 51, 10527 (1995).Google Scholar
8. The Na K, Al K, and Pb L III edges at 1.1, 1.5, and 16.3 keV, respectively, are outside the range of the Ge( 111) monochromating crystals used in this work.Google Scholar
9. The threshold energy in x-ray photoabsorption incorporates both the initial-state change in chemical potential (similar to that in the so-called chemical shift in x-ray photoemission) plus the final-state in energy of the lowest unfilled state of allowed symmetry.Google Scholar
10. Fundamentals of Inorganic Glasses, edited by Varshneya, A. K. (Academic Press, Boston, 1994).Google Scholar
11. Phifer, C. C. and Lucas, J., Mat. Sci. Forum 19, 111 (1987).Google Scholar
12. Laval, J. P. and Abaouz, A., J. Solid State Chem. 101, 18 (1992).Google Scholar
13. Laval, J. P., J. Non-Crystal. Solids 161, 123 (1993).Google Scholar