✦ LIBER ✦

A comparative compositional study of Ln2-xMxCuO4-y electron-doped superconductors

✍ Scribed by N.Y. Ayoub; J.T. Markert; E.A. Early; C.L. Seaman; L.M. Paulius; M.B. Maple

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 488 KB
Volume: 165
Category: Article
ISSN: 0921-4534
DOI: 10.1016/0921-4534(90)90383-p

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✦ Synopsis

We present the results of temperature-dependent magnetization and electrical resistivity measurements for a systematic series of compositions and concentrations of the electron-doped copper-oxide superconducting compounds Ln2_xMxCuO4_y(Ln = Pr, Nd, Sm, Eu; M=Ce, Th). The concentration dependences of normal and superconducting properties for both the Ce-and Thdoped systems are nearly identical, indicating that the Ce dopant ions exhibit simple tetravalent behavior. A number of distinct measures of superconducting properties display similar sharply-peaked concentration dependences; such variation is discussed in terms of phase homogeneity.

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