INFLUENCE OF HIGH PRESSURE ON EMISSION SPECTRA AND CRYSTAL FIELD STRENGTH FOR Eu3+ IN GdOBr
CHI YUAN-BIN (池元斌)a, LIU SHEN-XIN (刘慎薪)b, LI HONG-NIAN (李宏年)a, ZHAO XU-YI (赵绪义)b, WANG LI-ZHONG (王立中)a
a National Laboratory of Superhard Materials, Jilin University, Changchun 130023, China; b Changchun Institute of Physics, Academia Sinica, Changchun 130021, China
Abstract The emission spectra of the Eu3+ ion in GdOBr∶Eu3+ were measured in the range of pressure from 0 GPa to 12.4 GPa. The energy level schemes establis hed from the spectra show that the splittings of the 7F1,7F3 and 5D1 multiplets decrease obviously with increasing pressure. The crystal-field parameters Bkq and the crystal-field strength parameter S versus Bkq were determined at different pressures. With pressurization S reduces and the J-mixings of the state functions for the Eu3+ ion decrease, which is in agreement with the decrease of the multiplet splittings. This shows that for Eu3+ in REOX∶Eu3+ the diminution of the crystal-field strength with pressure, the authenticity of which is under suspicion for several years, is certain.
Received: 27 August 1996
Revised: 19 November 1996
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China.
Cite this article:
CHI YUAN-BIN (池元斌), LIU SHEN-XIN (刘慎薪), LI HONG-NIAN (李宏年), ZHAO XU-YI (赵绪义), WANG LI-ZHONG (王立中) INFLUENCE OF HIGH PRESSURE ON EMISSION SPECTRA AND CRYSTAL FIELD STRENGTH FOR Eu3+ IN GdOBr 1997 Acta Physica Sinica (Overseas Edition) 6 429
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