TITLE

Consequence of isovalent rare earth substitution to magnetic irreversibility in cation-stoichiometric CuBa[sub 2]RECu[sub 2]O[sub 6.93±0.01]

AUTHOR(S)
Yasukawa, Yukiko; Nakane, Takayuki; Yamauchi, Hisao; Karppinen, Maarit
PUB. DATE
May 2001
SOURCE
Applied Physics Letters;5/7/2001, Vol. 78 Issue 19, p2917
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
For a series of CuBa[sub 2]RECu[sub 2]O[sub 7-δ] (Cu-1[sup (Ba)]2[sup RE]12; RE= rare earth element) single-phase cation-stoichiometric samples with a fixed oxygen content, δ=0.07±0.01, a clear dependence of the H[sub irr] characteristics on the ionic radius of RE is revealed. With decreasing ionic radius of RE, the H[sub irr] characteristics are remarkably enhanced such that the samples containing heavy REs exhibit very high H[sub irr] values. This result implies that through isovalent cation substitution alone carrier-density distribution and thereby the superconductivity characteristics may be controlled. © 2001 American Institute of Physics.
ACCESSION #
4710416

 

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