Evidence of a cubic iron sub-lattice in t-CuFe2O4 demonstrated by X-ray Absorption Fine Structure

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 com-pared 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

Application of copper-carbon fibre composites to power semiconductor devices

55.00; Translated from Japanese (Nippon Kinzoku Gakkai-Shi 1986 v. 50(6) p. 583-589)Available from British Library Document Supply Centre- DSC:9022.0602(BISI-NF-Trans--162)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo