Repozytorium
Wyszukaj
Kolekcje
Inne
Trends in Hamiltonian parameters determined by systematic analysis of f-d absorption spectra of divalent lanthanides in alkali-halides hosts: II. CaCl2:Ln2+ (Ln = Sm, Eu ,Tm, and Yb).
Autorzy
Rok wydania
2018
Czasopismo
Numer woluminu
197
Strony
66-75
DOI
10.1016/j.jlumin.2018.01.011
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Systems containing divalent lanthanide elements (Ln2+) are hard to synthesize and thus their characterization isstill largely an unexplored area. The absorption spectra of most divalent Ln2+ions were, until recently, obtainednearly exclusively for Ln2+:CaF2crystals. In thefirst paper in a series devoted to systematic analysis of f-dabsorption spectra of Ln2+in alkali-halides hosts we presented new experimental data for Nd2+and Dy2+ionsin SrCl2and reanalyzed available data for SrCl2:Ln2+(Ln = Sm, Eu, Tm, and Yb). The increased number ofspectral data on the f-d transitions for Ln2+ions makes SrCl2the second best studied matrix. The second paper inthis series is devoted to CaCl2:Ln2+(Ln = Sm, Eu, Tm, and Yb). Thefirst absorption, emission, and excitationspectra for Sm2+,Eu2+and Yb2+in CaCl2are reported. Using a uniform methodology based on a parametricHamiltonian model proposed in Part I, a systematic analysis of the spectra is performed. This approach yieldsrefined and consistent sets of the free-ion parameters and crystal-field (CF) ones. Systematic CF analysis of thelarge spectral dataset for CaCl2:Ln2+consisting of a total of four ions allows revealing inherent trends across theLn series. Our results enable partial verification of the trends uncovered in Part I for Ln2+:SrF2. It appears thatthe trends in the free-ion parameters and, to a lesser extent, CF ones observed for one Ln2+ion are sufficientlysystematic to allow for tentative predictions of the spectrum for any lanthanide ion based on the sets of para-meters derived from the spectra obtained for another ion in the same matrix.
Słowa kluczowe
Rare earth alloys and compounds, Optical absorption spectroscopy, Ln 2+ :CaCl 2, Divalent Sm, Eu, Tm, and Yb, Crystal and ligand fields
Adres publiczny
https://doi.org/10.1016/j.jlumin.2018.01.011
Strona internetowa wydawcy
Podobne publikacje
Trends in Hamiltonian parameters determined by systematic analysis of f-d absorption spectra of divalent lanthanides in alkali-halides hosts: III. CsSrBr3:Ln2+ (Ln = Nd, Sm, Eu, Tm, and Yb)
Karbowiak Mirosław, Maciejewska Kamila, Rudowicz Czesław
Crystal-field analysis of Ho3+ ions HoCl3·6H2O.
Karbowiak Mirosław, Rudowicz Czesław, Gnutek Paweł, Mech A.