Fe-site assignments in Y1Ba2Cu3O7 revisited

Boolchand, P., McDaniel, D., Blue, C., Wu, Y., Enzweiler, R., Elgaid, K. ORCID: https://orcid.org/0000-0003-3265-1097 and Burrows, R. 1992. Fe-site assignments in Y1Ba2Cu3O7 revisited. Hyperfine Interactions 68 (1-4) , pp. 15-25. 10.1007/BF02396448

Full text not available from this repository.

Abstract

A new symmetric Fe3+ site (labelled E) (δ=0.28(2) mm/s and Δ=0.15 mm/s) is observed in the R1Ba2Cu3O7 family of superconductors for R=Y and Eu. The decay and growth of site E are established in two seemingly unrelated experiments, one as a function of room temperature aging for R=Y, and the other as a function of oxygen loading at elevated temperatures and pressures for R=Eu. In each experiment, the results show that site E is genetically related to the well documented chainsites A(Δ=1.9 mm/s), C(Δ=1.1 mm/s) and D(Δ=1.6 mm/s). We propose that site E represents a quasi-octahedral chain-site having pairs of O(1), O(4) and O(5) nearestneighbor oxygen sites. The two remaining doublets, B(Δ≈0.4 mm/s) and B′(Δ=0.78 mm/s) represent Fe3+ dopant sites present in the all-important CuO2 planes, possessing coordination numbers of 6 and 5, respectively.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Springer Verlag (Germany)
ISSN:	0304-3843
Last Modified:	04 Nov 2022 12:18
URI:	https://orca.cardiff.ac.uk/id/eprint/122585

Citation Data

Cited 9 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item