Correlations Between Superconducting Properties and Chemical Homogeneity of Samples in the La1.85-xndxsr0.15cuo4 System
(1993) Journal of Alloys and Compounds — Vol. 196, n° 1-2, p. 149-154 (1993)
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- Abstract
- In the La1.85-xNdxSr0.15CuO4 system, phases deriving from the K2NiF4-type structure are found in the 0 less-than-or-equal-to x less-than-or-equal-to 0.98(5) composition range. Their superconducting properties are strongly influenced by the presence of chemical microinhomogeneities revealed by microprobe analysis and are dependent on the synthesis method, as discussed in more detail for x = 0.6. Electrical and magnetic measurements performed on samples of this system show that bulk superconductivity is observed only for x less-than-or-equal-to 0.4. The occurrence at low temperature of a structural transition explains the disappearance of the superconducting properties. This change induces a peculiar behaviour in the transport properties of these oxides.
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Citations
Hejtmanek, J., Chevalier, B., Tressaud, A., Brisson, C., Etourneau, J., Cassart, M., & Issi, JP. (1993). Correlations Between Superconducting Properties and Chemical Homogeneity of Samples in the La1.85-xndxsr0.15cuo4 System. Journal of Alloys and Compounds, 196(1-2), 149-154. https://doi.org/10.1016/0925-8388(93)90586-C (Original work published 1993)