Abstract
We have studied the effect of CaF2:Eu luminophore synthesis methods on the charge state of europium. We have shown that Eu3+ predominates over Eu2+ in samples obtained by coprecipitation of europium with calcium fluoride, and the ratio Eu3+/Eu2+ grows as the total amount of europium increases. Partial charge conversion of the europium occurs during calcination of the samples, due to changes in the excess fluorine balance. We studied the luminescence, magnetic susceptibility, and EPR of the synthesized samples. We have shown that in a solid solution, europium forms large ordered clusters, determining both the luminescent and the magnetic properties of the material.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
P. P. Feofilov, Opt. i Spektr., 1, No. 7, 992–1001 (1956).
Y. Shimizu, M. Minowa, W. Suganuma, and Y. Inoue, Phys. Lett., B633, 195–200 (2006).
P. Kisliuk, H. H. Tippins, C. A. Moore, and S. A. Pollack, Phys. Rev., 171, No. 2, 336–342 (1968).
A. E. Nikiforov, A. Yu. Zakharov, V. A. Chernyshev, M. Yu. Ugryumov, and S. V. Kotomanov, Fiz. Tverd. Tela, 45, No. 5, 822–825 (2003).
R. J. Hamers, J. R. Wietfeldt, and J. C. Wright, J. Chem. Phys., 77, No. 2, 683–692 (1982).
K. M. Cirillo-Penn and J. C. Wright, Phys. Rev., B41, No. 15, 10799–10807 (1990).
W. Kaiser and C. G. B. Garrett, Phys. Rev. Lett., 7, 229–231 (1961).
S. M. Dhopte, P. L. Muthal, V. K. Kondawar, and S. V. Moharil, J. Lumin., 54, 95–101 (1992).
K. Shimamura, N. Shiran, A. Gektin, V. Voronova, V. Nesterkina, N. Ichinose, E. Villora, and T. Shishido, Funct. Mater., 11, No. 4, 676–679 (2004).
L. Paama, E. Parnoja, M. Must, and P. Peramaki, J. Anal. At. Spectrom., 16, 1333–1336 (2001).
V. D. Kuznetsov, Prib. Tekh. Eksp., 4, 196–201 (1985).
G. Blasse, in: B. Di Bartolo, ed., Luminescence of Inorganic Solids, Plenum Press, New York/London (1978), pp. 457–494.
K. M. Cirillo-Penn and J. C. Wright, J. Lumin., 48-49, 505–508 (1991).
M. Danilkin, M. Must, É. Pedak, É. Parnoja, G. Ryasnyi, V. Seeman, I. Shpin’kov, and L. Shpin’kova, Zh. Prikl. Spektr., 62, No. 3, 186–191 (1995).
W. P. Wolf and J. H. Van Vleck, Phys. Rev., 118, No. 6, 1490–1492 (1960).
S. Bhattacharyya, J. Appl. Phys., 80, No. 9, 5213–5217 (1996).
V. T. Kalinnikov and Yu. V. Rakitin, Introduction to Magnetochemistry. The Static Magnetic Susceptibility Method in Chemistry [in Russian], Nauka, Moscow (1980).
J. M. Baker, B. Bleaney, and W. Hayes, Proc. Roy. Soc. (London), A247, 141–151 (1958).
S. V. Upadeo, T. K. Gundurao, and S. V. Moharil, J. Phys.:Condens. Matter, 6, 9459–9468 (1994).
A. A. Manenkov and A. M. Prokhorov, Dokl. Akad. Nauk SSSR, 107, 402–404 (1956).
Author information
Authors and Affiliations
Corresponding author
Additional information
__________
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 74, No. 6, pp. 773–779, November–December, 2007.
Rights and permissions
About this article
Cite this article
Danilkin, M.I., Belousov, A.P., Klimonskii, S.O. et al. Formation of Eu2+ and Eu3+ centers in synthesis of CaF2:Eu luminophores. J Appl Spectrosc 74, 858–865 (2007). https://doi.org/10.1007/s10812-007-0133-5
Received:
Issue Date:
DOI: https://doi.org/10.1007/s10812-007-0133-5