<abstract xmlns="http://www.w3.org/1999/xhtml">In high Tc superconductors (HTSC) the activation energy gives information about the pinning properties of a sample under applied magnetic field. Pinning of vortices determines the critical current density Jc which is of great importance for practical applications of HTSC. Instead of magnetic measurements, the activation energy may be calculated from resistivity measurements realized under magnetic field. This kind of measurement has been made in this work for yttrium doped samples of Bi2Sr2CaCu2O8+d (Bi-2212) for different values of applied magnetic field. Samples of Bi2Sr2Ca1-xYxCu2O8+d (x = 0, 0.025, 0.1, 0.25) were prepared by a sol-gel method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive analysis of X-ray. The measurements of resistivity were made using a classical four probe method and DC current. The magnetic field was applied with a constant amplitude of 0 T, 1 T, 2 T and 3 T. The obtained results show that the activation energy decreases with introduction of yttrium, but has a relative maximum when x is equal 0.1. The decrease of the activation energy is explained by the granular nature of the samples which promotes 3D transition to 2D of the vortex lattice.</abstract>

In high Tc superconductors (HTSC) the activation energy gives information about the pinning properties of a sample under applied magnetic field. Pinning of vortices determines the critical current density Jc which is of great importance for practical applications of HTSC. Instead of magnetic measurements, the activation energy may be calculated from resistivity measurements realized under magnetic field. This kind of measurement has been made in this work for yttrium doped samples of Bi2Sr2CaCu2O8+d (Bi-2212) for different values of applied magnetic field. Samples of Bi2Sr2Ca1-xYxCu2O8+d (x = 0, 0.025, 0.1, 0.25) were prepared by a sol-gel method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive analysis of X-ray. The measurements of resistivity were made using a classical four probe method and DC current. The magnetic field was applied with a constant amplitude of 0 T, 1 T, 2 T and 3 T. The obtained results show that the activation energy decreases with introduction of yttrium, but has a relative maximum when x is equal 0.1. The decrease of the activation energy is explained by the granular nature of the samples which promotes 3D transition to 2D of the vortex lattice.

Effect Y substitution on the microstructure, transport and magnetic proprieties of Bi2Sr2Ca1Cu2O8+δ superconducting ceramics

Materials Science and Applications Research Unit, Physics Department

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Effect Y substitution on the microstructure, transport and magnetic proprieties of BiSrCaCuO superconducting ceramics

In high Tc superconductors (HTSC) the activation energy gives information about the pinning properties of a sample under applied magnetic field. Pinning of...

Effect Y substitution on the microstructure, transport and magnetic proprieties of Bi₂Sr₂Ca₁Cu₂O_8+δ superconducting ceramics

Article Category: Research Article

Pubblicato online: 12 set 2016

Pagine: 582 - 590

Ricevuto: 26 nov 2016

Accettato: 03 giu 2016

DOI: https://doi.org/10.1515/msp-2016-0077

Parole chiave
high Tc superconductors, Y substitution, sol-gel method, activation energy, 3D to 2D transition

© 2016 S. Menassel et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Effect Y substitution on the microstructure, transport and magnetic proprieties of Bi2Sr2Ca1Cu2O8+δ superconducting ceramics

Article Category: Research Article

Pubblicato online: 12 set 2016

Pagine: 582 - 590

Ricevuto: 26 nov 2016

Accettato: 03 giu 2016

DOI: https://doi.org/10.1515/msp-2016-0077

Parole chiavehigh Tc superconductors, Y substitution, sol-gel method, activation energy, 3D to 2D transition

© 2016 S. Menassel et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Effect Y substitution on the microstructure, transport and magnetic proprieties of Bi₂Sr₂Ca₁Cu₂O_8+δ superconducting ceramics

Parole chiave
high Tc superconductors, Y substitution, sol-gel method, activation energy, 3D to 2D transition