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Effect of Ca doping on the superconducting properties of GdBaSrCu3O7−δ bulk samples

✍ Scribed by T.V. Chong; S. Kambe; O. Ishii

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
395 KB
Volume
469
Category
Article
ISSN
0921-4534

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✦ Synopsis

Gd 1Àx Ca x BaSrCu 3 O 7Àd samples (0 6 x 6 0.1) were prepared via solid-state reaction. Four-point probes method was used for resistance versus temperature measurements. Results show decrease in T c by increasing x content. This variation is assumed to be irrelevant to the different phases or impurity effects since X-ray patterns show all samples are tetragonal single-phase. Ca doping decreases the oxygen content and lattice parameters of the samples. It is suggested that Ca prevents the dislocation of oxygen, and then disrupts the hole concentration of the system and antiferromagnetic correlation at CuO 2 planes. Subsequently, destroys the superconductivity of the samples.

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