Novel functional properties of charge-transition oxides synthesized under high pressure
Yuichi Shimakawa
Abstract:Oxides containing unusually high-valence transition-metal ions often exhibit charge transitions to relieve the electronic instabilities. A-site-ordered quadruple perovskites LnCu 3 Fe 4 O 12 with the unusually high-valence Fe 3.75+ , which are synthesized under high-pressure conditions, show intermetallic-charge-transfer transitions. In this review article, novel thermo-related functional properties induced by the charge transitions in LnCu 3 Fe 4 O 12 are highlighted. A large negative-thermal-expansion behavi… Show more
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