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Title: Rare earth ion size effect in the rates of suppression of the T<inf>c</inf>'s of the 'RE-123' high-temperature superconductors due to magnetic ion substitution into the Cu(2) sites
Authors: I. M. Tang
S. Leelaprute
P. Winotai
Mahidol University
The Institute of Science and Technology for Research and Development, Mahidol University
Keywords: Energy;Engineering;Materials Science;Physics and Astronomy
Issue Date: 1-Feb-1999
Citation: Physica C: Superconductivity and its Applications. Vol.312, No.3-4 (1999), 321-326
Abstract: The observed dependences of the rates of suppression of the Tc's due to the substitution of magnetic transition metal (TM2+) ions into the Cu(2) sites of the 'RE-123' high-temperature superconductors (HTSCs) on the size of the rare earth ions are studied within the framework of a (d+s)-wave symmetry description of the order parameters in these superconductors. It is assumed that the orthorhombic distortions which occur in these HTSCs induce a modification in the pairing potential responsible for superconductivity (the exchange of spin fluctuations) in the originally tetragonal HTSC. It is found that the rate of suppression of Tcdue to magnetic ion substitution into the Cu(2) sites depends on the orthorhombicity D=(b-a)/a of these HTSCs, the orthorhombicity being in turn dependent on the rare earth ion size.
ISSN: 09214534
Appears in Collections:Scopus 1991-2000

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