GdBa2Cu3O7−d纳米桥中快速涡通量运动

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED

Physica C-superconductivity and Its Applications Pub Date : 2025-01-07 DOI:10.1016/j.physc.2025.1354649

L.E. Díaz , N. Haberkorn

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引用次数: 0

摘要

我们报道了通过电流-电压测量GdBa2Cu3O7−δ纳米电桥的涡流动力学。采用溅射法生长长为10 μm、宽为0.62 μm、厚为80 nm的样品，采用光刻、聚焦离子束铣削两步工艺制备。结果表明，该薄膜具有较低的临界电流密度，但具有较高的涡通量运动。从拉金-奥夫钦尼科夫不稳定性中，我们提取了在低温和0.4 T左右的场（有近10个涡穿过桥宽）下超过10 km/s的速度，在5 T左右的场中大约3 km/s的速度。这些结果与最近报道高涡速度的出版物进行了比较。

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Rapid vortex flux motion in GdBa2Cu3O7−d nanobridges

We report on the vortex dynamics of a GdBa₂Cu₃O_7−δ nanobridge through current-voltage measurements. The study is conducted on a sample with a length of 10 μm, a width of 0.62 μm, and a thickness of 80 nm, which was grown by sputtering and fabricated using a two-step process: first, optical lithography, followed by focused ion beam milling. The results show that the film exhibits a low critical current density but demonstrates high vortex flux motion. From the Larkin–Ovchinnikov instability, we extract velocities exceeding 10 km/s at low temperatures and fields around 0.4 T (with nearly 10 vortices crossing the bridge width) and approximately 3 km/s for fields around 5 T. These results are compared with recent publications reporting high vortex velocities.

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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.