Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1259594 | Journal of Rare Earths | 2009 | 4 Pages |
Abstract
Absorption spectra of the mixed chain nickelates (NdxY1−x)2BaNiO5 were measured for different x. Experimentally two evidences for the presence of non-equivalent rare-earth centers (NEREC) were found. First, the linewidths show a very strong broadening for x when the calculated distribution over NEREC is wide. Second, a complicated lineshape of the lowest-frequency line in the region of the 4I9/2→4I11/2 electronic transition is in good agreement with statistics of NEREC. A simple modeling for the line broadening due to NEREC is suggested.
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