Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9801895 | Solid State Communications | 2005 | 4 Pages |
Abstract
Rare earth compounds are known to often exhibit peculiar valence states. In the present study, we show, by electron energy loss spectroscopy (EELS) measurements under electron channeling conditions, the existence of a novel valence state for the cerium atoms in Ce2Zr2O7.5, where the valence state is split into two states, with the ions exhibiting a trivalent character (Ce3+) when facing oxygen planes with oxygen vacancies, and a tetravalent character (Ce4+) when facing oxygen planes with no oxygen vacancies. This result should prompt reconsideration of the conventional concept of the valence fluctuation in rare earth compounds.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Shigeo Arai, Shunsuke Muto, Tsuyoshi Sasaki, Kazuyoshi Tatsumi, Yoshio Ukyo, Kotaro Kuroda, Hiroyasu Saka,