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<p>The structural properties and Raman phonon modes of Bi<sub>2</sub>Sr<sub>2</sub>Ca<sub>1-x-y</sub>V<sub>y</sub>Gd<sub>x</sub>Cu<sub>2</sub>O<sub>8±δ</sub> system showed the formation of the Bi-2212 phase with the co-existence of the Bi-2201 phase. The structural parameters were affected by the difference in the ionic radius between Gd<sup>3</sup>⁺ that replaces Ca<sup>2</sup>⁺ ions. The morphological studies exhibit the nanocrystals with a granular surface morphology with plate-like structure. A Field Cooled (FC) investigation exhibits the remarkable ferromagnetic behaviour in the low Gd (x = 0.05, 0.10) concentration confirmed from (M-T) and M-H hysteresis loop with the ability for the superconducting transition at (<i>T</i><sub><i>c</i></sub> = 84 and 80 K). With the increase in Gd concentration x = 0.15, the diamagnetic signal was achieved with (<i>T</i><sub><i>c</i></sub> = 83 K) for Bi-2212 phase. The achieved M-H hysteresis loops at 10, 40, 60 K showed the typical diamagnetic behaviour of superconducting phase of Bi-2212, where the critical current density (<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10854_2025_15499_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="17" /> </InlineMediaObject> <EquationSource Format="TEX">\(J_{c}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>J</mi> <mi>c</mi> </msub> </math></EquationSource> </InlineEquation>) values were calculated where the highest value was 3.2 × 10<sup>4</sup> A/cm<sup>2</sup> at 10 K.</p>

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Anomalous magnetization reversal and superconducting transition in Bi2Sr2Ca1-x-yVyGdxCu2O8±δ nanocomposites

  • 期刊论文

  • 发表日期：

    2025年8月11日

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  • Soraya Abdelhaleem,
  • Amani Alruwaili,
  • Mohammed O. Alziyadi,
  • K. Yakinci,
  • M. S. Shalaby

摘要

The structural properties and Raman phonon modes of Bi2Sr2Ca1-x-yVyGdxCu2O8±δ system showed the formation of the Bi-2212 phase with the co-existence of the Bi-2201 phase. The structural parameters were affected by the difference in the ionic radius between Gd3⁺ that replaces Ca2⁺ ions. The morphological studies exhibit the nanocrystals with a granular surface morphology with plate-like structure. A Field Cooled (FC) investigation exhibits the remarkable ferromagnetic behaviour in the low Gd (x = 0.05, 0.10) concentration confirmed from (M-T) and M-H hysteresis loop with the ability for the superconducting transition at (Tc = 84 and 80 K). With the increase in Gd concentration x = 0.15, the diamagnetic signal was achieved with (Tc = 83 K) for Bi-2212 phase. The achieved M-H hysteresis loops at 10, 40, 60 K showed the typical diamagnetic behaviour of superconducting phase of Bi-2212, where the critical current density ( \(J_{c}\) J c ) values were calculated where the highest value was 3.2 × 104 A/cm2 at 10 K.