Effects of annealing treatments on the structure and superconducting properties of polycrystalline YBa2Cu3-xFexO7-δ

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED Physica C-superconductivity and Its Applications Pub Date : 2024-07-15 DOI:10.1016/j.physc.2024.1354570

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Abstract

The influence of annealing treatments on the crystal structure and superconducting properties of polycrystalline YBa₂Cu_3-_xFe_xO_7-_δ has been estimated. The Fe elements was doped into Cu sites in polycrystalline YBa₂Cu_3-_xFe_xO_7-_δ for 0.0 ≤ x ≤ 0.4. All of samples were annealed under different atmospheres: a low-oxygen-pressure atmosphere in flowing oxygen and a high-oxygen-pressure ambient. The local structure, magnetization, and electrical transport properties have been compared for the two series of samples before and after annealing. The lattice constants and T_c have been shown as a function of iron concentration for samples, indicating that the polycrystalline YBa₂Cu_3-_xFe_xO_7-_δ materials display a structural transition from orthorhombic to tetragonal phase with increasing Fe concentration. Compared to as-synthesized samples, the annealed samples achieve a higher T_c. Furthermore, the YBa₂Cu_3-_xFe_xO_7-_δ samples with x = 0.2, 0.3, 0.4 undergo from non-superconducting state to superconducting state after annealing.

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退火处理对多晶 YBa2Cu3-Fe O7- 结构和超导特性的影响

研究估算了退火处理对多晶 YBa2Cu3-xFexO7-δ 晶体结构和超导特性的影响。在多晶 YBa2Cu3-xFexO7-δ 的铜位点中掺入了 0.0 ≤ x ≤ 0.4 的铁元素。所有样品均在不同的气氛下退火：低氧压气氛下的流动氧气和高氧压环境。比较了退火前后两个系列样品的局部结构、磁化和电传输特性。样品的晶格常数和 Tc 随铁浓度的变化而变化，表明随着铁浓度的增加，多晶 YBa2Cu3-xFexO7-δ 材料的结构从正方相转变为四方相。与合成样品相比，退火样品的 Tc 值更高。此外，x = 0.2、0.3、0.4 的 YBa2Cu3-xFexO7-δ 样品在退火后会从非超导状态转变为超导状态。

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来源期刊

Physica C-superconductivity and Its Applications 物理-物理：应用

CiteScore

2.70

自引率

11.80%

发文量

102

审稿时长

66 days

期刊介绍： Physica C (Superconductivity and its Applications) publishes peer-reviewed papers on novel developments in the field of superconductivity. Topics include discovery of new superconducting materials and elucidation of their mechanisms, physics of vortex matter, enhancement of critical properties of superconductors, identification of novel properties and processing methods that improve their performance and promote new routes to applications of superconductivity. The main goal of the journal is to publish: 1. Papers that substantially increase the understanding of the fundamental aspects and mechanisms of superconductivity and vortex matter through theoretical and experimental methods. 2. Papers that report on novel physical properties and processing of materials that substantially enhance their critical performance. 3. Papers that promote new or improved routes to applications of superconductivity and/or superconducting materials, and proof-of-concept novel proto-type superconducting devices. The editors of the journal will select papers that are well written and based on thorough research that provide truly novel insights.