Jpn. J. Appl. Phys. 22 (1983) pp. 1669-1674 |Next Article| |Table of Contents|
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Effects of Rare Earth Impurities on Photochromic Characteristics of Rare Earth Orthoniobates
Musashino Electrical Communication Laboratory, Nippon Telegraph and Telephone Public Corporation
(Received March 28, 1983; accepted for publication August 20, 1983)
Some rare earth orthoniobates, RNbO4, have been found to exhibit photochromic properties ascribed to the formation of color centers. Compounds with rare earths, R, of gadolinium and ytterbium, have been shown to have a particularly long duration of visible coloration after ultraviolet (UV) irradiation at room temperature. Partial substitution of praseodymium or terbium as the rare earths enhances these UV coloration characteristics. Substitution of about 0.8% of terbium is remarkably effective in accelerating the thermal bleaching, increasing the bleaching rate by about one order of magnitude.
- B. W. Faughnan, D. L. Steabler and Z. J. Kiss: Applied Solid State Science eds. R. Wolfe and C. J. Kriessman (Academic Press, New York and London, 1971) Vol. 2, p. 107.
S. K. Deb and L. J. Forrestal: Techniques of Chemistry ed. G. H. Brown (Wiley-Interscience, New York, London, Sydney and Toronto, 1972) Vol. 3, p. 634.
- Z. J. Kiss: IEEE J. Quantum Electron. QE-5 (1969) 12.
- R. C. Duncan, Jr.: RCA Rev. 33 (1972) 248.
- G. Jackson: Opt. Acta 16 (1969) 1.
- Y. Suemune:
Jpn. J. Appl. Phys. 12 (1973) 467[JSAP].
- A. I. Komkov: Dokl. Akad. Nauk SSSR 126 (1959) 853.
- W. L. Lanmaker, A. Bril, J. W. ter Vrugt and J. Broos: Philips Res. Rep. 21 (1966) 270.
- S. Sakka: J. Am. Ceram. Soc. 52 (1969) 69.
- R. C. Duncan, Jr., B. W. Faughnan and W. Phillips: Appl. Opt. 9 (1970) 2236.
- R. W. G. Wyckoff: Crystal Structures 2nd ed. (International Pub., New York, London and Sydney, 1965) Vol. 3, p. 19.