THE PR AND CA SUBSTITUTION IN GDBA2CU307-Δ

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SHAKERIPOUR H.; AKHAVAN M.

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Journal: Iranian Journal of Physics Research Year:2002 | Volume:3 | Issue:1 Page(s): 39-50

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Information Journal Paper

Title

THE PR AND CA SUBSTITUTION IN GDBA2CU307-Δ

Author(s)

SHAKERIPOUR H. | AKHAVAN M. | Issue Writer Certificate

Keywords

GDPRCA-123Q4

HIGH TEMPERATURE SUPERCONDUCTORSQ4

HOLE LOCALIZATIONQ4

TAPSQ4

PINNING CENTERQ4

Abstract

The granular Gd 1-x--z Pr x CazBa2Cu3O7-δ-(GDPRCA-123) high-temperature cuprate samples with 0.0≤x≤0.3 and 0.0≤z≤0.35 are prepared by standard solid state reaction and characterized by XRD and SEM techniques. The BaCu02 and impurity phases are less than 1% in the samples having high levels of Pr and Ca concentrations. The electrical resistivity measurements show a nonlinear reduction in Tc(x,z=etc) versus x. Moreover, the Tc(z) curve with x=0 is nonlinear and a plateau appears at z≈0.05-0.015. For Pr-Ca-doped samples with a constant concentration of Pr, Tc increases with the increase of Ca up to an optimum value of Ca doping and then in decreases. Based on these observations, we suggest that hole filling and HOLE LOCALIZATION the main effects of Pr ion substitution. The magnetic measurements indicate that the value of HCI is in the order of 10 mT. The mangetoresistance measurements have been measured and analyzed. The superconducting transition region is broadened by the application of magnetic field. The experimental data near the onsen of superconductivity are fitted with the Ambegakor and Halperin (AB) phase-slip model. We observe that the AH parameter, y(H), depends not only on the temperature and the magnetic field, but also on the Pr and Ca ions concentrations. It is observed that the critical current density increases with Ca substitution and decreases with Pr substitution in Gd-123 system. We suggest that the Pr ion substitution probably enhances the weak link, but the Ca ion acts as flux PINNING CENTER in the GDPRCA-123 system.

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APA: Copy

SHAKERIPOUR, H., & AKHAVAN, M.. (2002). THE PR AND CA SUBSTITUTION IN GDBA2CU307-Δ. IRANIAN JOURNAL OF PHYSICS RESEARCH, 3(1), 39-50. SID. https://sid.ir/paper/1662/en

Vancouver: Copy

SHAKERIPOUR H., AKHAVAN M.. THE PR AND CA SUBSTITUTION IN GDBA2CU307-Δ. IRANIAN JOURNAL OF PHYSICS RESEARCH[Internet]. 2002;3(1):39-50. Available from: https://sid.ir/paper/1662/en

IEEE: Copy

H. SHAKERIPOUR, and M. AKHAVAN, “THE PR AND CA SUBSTITUTION IN GDBA2CU307-Δ,” IRANIAN JOURNAL OF PHYSICS RESEARCH, vol. 3, no. 1, pp. 39–50, 2002, [Online]. Available: https://sid.ir/paper/1662/en

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