ISSN:
1059-910X
Keywords:
Superconductivity
;
n-type superconductors
;
Nonstoichiometry
;
Superconducting oxides
;
T, T′
;
T* structures
;
Life and Medical Sciences
;
Cell & Developmental Biology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Natural Sciences in General
Notes:
After reviewing microstructural studies on superconducting materials showing T, T′, and T* structural types, results are presented on the microstructure of some n-type superconductors and related materials prepared with accurate control of the oxygen stoichiometry. Electron microscopy is used to describe the ordering of interstitial oxygen defects in T-type La2NiO4+δ leading to the formation of the n = 2 term of a homologous series with the general formula La8nNi4nO16n+1. Structural transitions and superstructure formation in the Pr2-x-yCexSryCuO4-δ system are reported, where T, T′:;, and T* phases are isolated as a function of both Ce and Sr content. © 1995 Wiley-Liss, Inc.
Additional Material:
15 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jemt.1070300302
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