# Effects of calcium substitution on the superconducting properties of R(1-x)CaxBa2Cu3Oz (R=Eu, Gd, Er; 0=\<x\<=0.3)polycrystalline samples

Source: [Effects of calcium substitution on the superconducting properties of R(1-x)CaxBa2Cu3Oz (R=Eu, Gd, Er; 0=\<x\<=0.3)polycrystalline samples](<https://www.sota2.com/research/paper/68fa27452c2a3760193c193d>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T11:54:49.736Z

Authors: E. K. Nazarova, K. Nenkov, G. Fuchs, K. -H. Muller

Published: 2006-01-31T12:15:03.000Z

## Abstract

The influence of Ca substitution on the superconducting properties of polycrystalline R1-xCaxBa2Cu3Oz (R = Eu, Gd, Er; x=0; 0.2; 0.25 and 0.3) samples has been studied by X-ray powder diffraction, ac susceptibility and dc magnetization measurements. The superconducting parameters such as critical temperature, inter- and intra-granular critical current and flux pinning are found to be strongly dependent both on Ca content and type of R element. The best combination of these parameters is found for the system Gd1-xCaxBa2Cu3Oz forming R1+yBa2-yCu3Oz clusters. The level of overdoping and the type of intergrain connection, were found to be influenced by the R element and the Ca concentration. Flux pinning in Gd1-xCaxBa2Cu3Oz is connected with the presence of R1+yBa2-yCu3Oz clusters.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/cond-mat/0601697>)

[PDF](<https://arxiv.org/pdf/cond-mat/0601697.pdf>)