Ontology highlight
ABSTRACT:
SUBMITTER: Chen WT
PROVIDER: S-EPMC3371588 | biostudies-literature | 2012
REPOSITORIES: biostudies-literature
Chen Wei-Tin WT Saito Takashi T Hayashi Naoaki N Takano Mikio M Shimakawa Yuichi Y
Scientific reports 20120611
Unusual high-valence states of iron are stabilized in a few oxides. A-site-ordered perovskite-structure oxides contain such iron cations and exhibit distinct electronic behaviors at low temperatures, e.g. charge disproportionation (4Fe⁴⁺ → 2Fe³⁺ + 2Fe⁵⁺) in CaCu₃Fe₄O₁₂ and intersite charge transfer (3Cu²⁺ + 4Fe³·⁷⁵⁺ → 3Cu³⁺ + 4Fe³⁺) in LaCu₃Fe₄O₁₂. Here we report the synthesis of solid solutions of CaCu₃Fe₄O₁₂ and LaCu₃Fe₄O₁₂ and explain how the instabilities of their unusual valence states of i ...[more]