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Rare‐Earth Ion Local Environments in Nd:Al 2 O 3 ‐P 2 O 5 ‐K 2 O Glass Studied by Electron Paramagnetic Resonance Spectroscopies
Author(s) -
Yue Yu,
Shao Chongyun,
Wang Fan,
Wang Yajie,
Chen Wei,
Hu Lili
Publication year - 2018
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201800100
Subject(s) - electron paramagnetic resonance , coordination sphere , ion , resonance (particle physics) , coordination number , atomic physics , spectral line , electron , rare earth , chemistry , nuclear magnetic resonance , crystallography , materials science , analytical chemistry (journal) , physics , mineralogy , organic chemistry , astronomy , quantum mechanics , chromatography
The rare‐earth local environments of Nd:Al 2 O 3 ‐P 2 O 5 ‐K 2 O glass with different P/Al ratios are analyzed using electron paramagnetic resonance (EPR). The echo‐detected field sweep (EDFS) line‐shape change hints at a modification of the local environment around Nd 3+ ion by various P/Al ratios. The coordination sphere structure of Nd 3+ ion is determined by three and four pulse electron spin echo envelope modulation (ESEEM) spectra. The off‐diagonal signal corresponding to 31 P Larmor frequency confirms that the second‐order coordination sphere of Nd 3+ ion is almost occupied by P atoms. Al is located at the higher‐order Nd 3+ coordination sphere as only diagonal resonance corresponding to the 27 Al was detected, the content of which rapidly increases with decreasing P/Al ratio.