Enhanced flux pinning properties of NaNbO3 nanorods added YBCO composite superconductor

被引：13

作者：

Dahiya, Mamta ^{[1
]}

Kumar, Rohit ^{[2
]}

Kumar, Dheeraj ^{[1
]}

Kumar, Dinesh ^{[3
]}

Khare, Neeraj ^{[1
,2
]}

机构：

[1] Indian Inst Technol Delhi, Dept Phys, Delhi 110016, India

[2] Indian Inst Technol Delhi, Nanoscale Res Facil, Delhi 110016, India

[3] Indian Inst Technol Delhi, Cent Res Facil, Delhi 110016, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 883卷

关键词：

YBCO superconductor; NaNbO3; Nanorod; Flux pinning; Critical current density; AC SUSCEPTIBILITY; CURRENT-DENSITY; PARTICLES; ABILITY;

D O I：

10.1016/j.jallcom.2021.160840

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, sodium niobate (NaNbO3) nanorods (NR) - YBCO superconductor composites with different wt % (0-2%) of NaNbO3 were prepared via a two-step process of hydrothermal and solid-state reaction, and its structural, electrical, and magnetic characterizations were carried out. XRD studies revealed that the orthorhombicity of YBCO is preserved in all nanocomposite samples. The superconducting transition temperature decreases from 92 K to 90.5 K when the addition of NaNbO3 was increased to 2 wt%. Magnetization studies revealed a significant increase of critical current (J(c)) and pinning force (F-p) in the NaNbO3 (NR) added YBCO sample which has been attributed to the creation of artificial pinning centers due to the presence of NaNbO3 NR. For the 0.5 wt% nanorods added sample, the enhancement in J(c) and F-p was maximum. Temperature and field dependence of J(c) were carried out to probe the nature of pinning in the nanocomposite superconductors. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：10

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