Direct experimental evidence for the local oxygen non-stoichiometry in electron-doped Nd2-xCexCuO4-delta

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Direct experimental evidence for the local oxygen non-stoichiometry in electron-doped Nd2-xCexCuO4-delta

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Title: Direct experimental evidence for the local oxygen non-stoichiometry in electron-doped Nd2-xCexCuO4-delta
Author: SINGH, OG; HARENDRANATH, CS; PRAKASH, O; PADALIA, BD
Abstract: A direct evidence is obtained for the local oxygen non-stoichiometry in T'-type Nd2-xCexCuO4-delta using a high resolution analytical SEM technique. A correlation between the oxygen non-stoichiometry and superconductivity is established. It is found that the oxygen content increases from the grain boundary towards the interior of a superconducting grain, suggesting a gradual fall in T-c towards the core. Our results reveal that critical levels of carriers and oxygen vacancies are essential for the T'-type cuprates to exhibit superconductivity. Copyright (C) 1996
URI: http://dx.doi.org/10.1016/0038-1098(96)80047-0
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10727
http://hdl.handle.net/10054/10727
Date: 1996


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