The effect of nanosized CoFe2O4 addition on the magnetic properties of GdBa2Cu3O7-δ using AC magnetic susceptibility measurements

R. AWAD; N. H. MOHAMMED; A. I. ABOU ALY; S. ISBER; H. A. MOTAWEH; D. EL-SAID BAKEER; M. ROUMIÉ

doi:10.1007/s40145-015-0177-6

Journal of Advanced Ceramics 2016, 5(1): 93-101 https://doi.org/10.1007/s40145-015-0177-6

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Open Access | Issue | Published: 31 March 2016

The effect of nanosized CoFe₂O₄ addition on the magnetic properties of GdBa₂Cu₃O_7-δ using AC magnetic susceptibility measurements

Show Author's Information Hide Author's Information R. AWAD^{^a^,^b}(

), N. H. MOHAMMED^{^a}, A. I. ABOU ALY^{^a}, S. ISBER^{^c}, H. A. MOTAWEH^{^d}, D. EL-SAID BAKEER^{^d}, M. ROUMIÉ^{^e}

^a Physics Department, Faculty of Science, Alexandria University, Alexandria, Egypt

^c Physics Department, American University of Beirut, Beirut, Lebanon

^d Physics Department, Faculty of Science, Damanhur University, Damanhur, Egypt

^e Accelerator Laboratory, Lebanese Atomic Energy Commission, Beirut, Lebanon

^b Physics Department, Faculty of Science, Beirut Arab University, Lebanon

Keywords:

critical current density, Gd-123 phase, nanosized CoFe₂O₄, AC magnetic susceptibility (ACMS), particle induced X-ray emission (PIXE)

Cite this article:

AWAD R, MOHAMMED NH, ALY AIA, et al. The effect of nanosized CoFe₂O₄ addition on the magnetic properties of GdBa₂Cu₃O_7-δ using AC magnetic susceptibility measurements. Journal of Advanced Ceramics, 2016, 5(1): 93-101. https://doi.org/10.1007/s40145-015-0177-6

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Abstract

Superconductor samples of type (CoFe₂O₄)_xGdBa₂Cu₃O_7-δ (0≤x≤0.1) were synthesized by the conventional solid-state reaction technique, whereas nanosized CoFe₂O₄ was prepared by co-precipitation method with grain size of about 8.5 nm. The elemental content of the prepared samples was determined using particle induced X-ray emission (PIXE). The temperature dependence of real ( $χ^{'}$ ) and imaginary ( $χ^{″}$ ) components of AC magnetic susceptibility (ACMS) at different magnetic field amplitude (3–15 Oe) was investigated. The analysis of the temperature dependence of ACMS was performed using Bean critical state model. The values of the critical current density $J_{c}$ at T < $T_{p}$ ( $T_{p}$ is the inter-granular loss peak temperature) were calculated as a function of magnetic field and nanosized CoFe₂O₄ content. It was found that the low nanosized CoFe₂O₄ addition content (x = 0.01) improves the critical current density $J_{c}$ of Gd-123 superconducting phase. The observed variation of $J_{c}$ with temperature indicated that the weak links are changed from superconductor– normal metal–superconductor (SNS) for free sample to superconductor–insulator–superconductor (SIS) type of junctions for samples added with nanosized CoFe₂O₄ of x < 0.01. We also discussed the experimental results in the framework of the critical state model to estimate the effective volume fraction of the grains $f_{g}$ using Cole–Cole plots.

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The effect of nanosized CoFe₂O₄ addition on the magnetic properties of GdBa₂Cu₃O_7-δ using AC magnetic susceptibility measurements

Show Author's information Hide Author's Information R. AWAD^{^a^,^b}(

), N. H. MOHAMMED^{^a}, A. I. ABOU ALY^{^a}, S. ISBER^{^c}, H. A. MOTAWEH^{^d}, D. EL-SAID BAKEER^{^d}, M. ROUMIÉ^{^e}

^a Physics Department, Faculty of Science, Alexandria University, Alexandria, Egypt

^c Physics Department, American University of Beirut, Beirut, Lebanon

^d Physics Department, Faculty of Science, Damanhur University, Damanhur, Egypt

^e Accelerator Laboratory, Lebanese Atomic Energy Commission, Beirut, Lebanon

^b Physics Department, Faculty of Science, Beirut Arab University, Lebanon

Abstract

Keywords: critical current density, Gd-123 phase, nanosized CoFe₂O₄, AC magnetic susceptibility (ACMS), particle induced X-ray emission (PIXE)

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Publication history

Received: 28 September 2015

Accepted: 03 December 2015

Published: 31 March 2016

Issue date: June 2021

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Acknowledgements

This work was performed in the Superconductivity and Metallic-Glass Lab, Physics Department, Faculty of Science, Alexandria University, Alexandria, Egypt, in cooperation with the Accelerator Laboratory, Lebanese Atomic Energy Commission, CNRS, Beirut, Lebanon, and the American University of Beirut, Beirut, Lebanon.

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