ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Tungsten-phosphate glasses doped with trivalent europium ion are synthesized and theirspectroscopic properties are analyzed. Following the evolution of the 5D0 → 7F1 electronictransition in a series of various glass compositions via two rank crystal field parameters (cfp’s), aslight modification of the local symmetry is evidenced in the series. Decay lifetimes of 5D1 and 5D0levels are also analyzed. Optical properties clearly correspond to Eu3+ in the glassy phase. At roomas well as at liquid nitrogen temperatures, the emission spectra display comparable features withprominent 5D0 → 7F2 transition. However, at 77 K, the maximum 7F1 splitting exhibits an increaseof ≈ 20-23 % for all compounds. This increase is directly connected to a change in localenvironment around the rare earth ion. The optical properties and the crystal field variation could becorrelated with the shortness of the metal-oxygen distances produced by the pressure when cooling
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.518.447.pdf
Permalink