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Evidence of a cubic iron sub-lattice in t-CuFe2O4 demonstrated by X-ray Absorption Fine Structure
DOI:
10.1038/s41598-017-19045-8
Authors:
Francesco
Caddeo
(University of Kent)
,
Danilo
Loche
(University of Kent)
,
Maria F.
Casula
(Università di Cagliari)
,
Anna
Corrias
(University of Kent)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Scientific Reports
, VOL 8
State:
Published (Approved)
Published:
January 2018
Diamond Proposal Number(s):
11086

Abstract: Copper ferrite, belonging to the wide and technologically relevant class of spinel ferrites, was grown in the form of t-CuFe2O4 nanocrystals within a porous matrix of silica in the form of either an aerogel or a xerogel, and compared to a bulk sample. Extended X-ray absorption fine structure (EXAFS) spectroscopy revealed the presence of two different sub-lattices within the crystal structure of t-CuFe2O4, one tetragonal and one cubic, defined by the Cu2+ and Fe3+ ions respectively. Our investigation provides evidence that the Jahn-Teller distortion, which occurs on the Cu2+ ions located in octahedral sites, does not affect the coordination geometry of the Fe3+ ions, regardless of their location in octahedral or tetrahedral sites.
Subject Areas:
Chemistry
Instruments:
B18-Core EXAFS
Documents:
s41598-017-19045-8.pdf