Superconducting and pining vortex properties of mixed state in deuterated κ-(BEDT-TTF)2Cu[N(CN)2]Br organic superconductor

IF 1 3区物理与天体物理 Q4 PHYSICS, APPLIED

Physica C-superconductivity and Its Applications Pub Date : 2025-12-15 Epub Date: 2025-10-15 DOI:10.1016/j.physc.2025.1354812

O. Sliman , A. Tirbiyine , J. Elqars , A. Bourdyme , M. Bellioua , N. El ghazal , H. Elouaddi , Y. Ait Ahmed , M. Id elamel , F. Bouzit

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引用次数: 0

Abstract

The analysis of the hysteresis loop at low and intermediate magnetic field, allows us to estimate the lower critical magnetic field H_c1 and the full penetration magnetic field H_f in deuterated κ-(ET)₂Cu[N(CN)₂]Br organic superconductors at temperature T = 2 K both in rapid and slow cooling of the sample, through the structural transformation that occurs near 80 K. The investigation of the hysteresis loop at intermediate magnetic fields reveals that the system does not undergo a vortex solid-to-liquid melting transition or a 3D–2D decoupling transition within the explored magnetic field range. The analysis of the pinning force at the same temperature shows that rapid cooling near 80 K dramatically reduces the pinning strength and completely alters the dominant pinning mechanism. Under slow cooling, the dominant mechanism is normal point pinning, whereas under rapid cooling it shifts to a surface pinning mechanism.

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氘化κ-(BEDT-TTF)2Cu[N(CN)2]Br有机超导体混合态的超导和缩流特性

通过对低磁场和中磁场下的磁滞回线的分析，我们可以通过在80 K附近发生的结构转变，估算出氘化κ-(ET)2Cu[N(CN)2]Br有机超导体在温度T = 2 K时快速和慢速冷却样品的低临界磁场Hc1和全穿透磁场Hf。对中磁场下磁滞回线的研究表明，系统在探测磁场范围内不发生涡流固-液熔融转变和三维-二维解耦转变。同一温度下的钉紧力分析表明，80 K附近的快速冷却显著降低了钉紧强度，完全改变了主要的钉紧机制。在慢冷条件下，以点钉为主，而在快冷条件下，以面钉为主。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.