无机材料学报

• 研究论文 •    

添加BaHfO3/BaZrO3纳米晶的YBa2Cu3O7-δ薄膜超导性能

祖浩文1, 黄荣铁2, 陈静1,2, 刘洋2, 李继红2, 蔡传兵1,2   

  1. 1.上海大学 理学院,上海市高温超导重点实验室,上海200444;
    2.上海市上创超导科技有限公司, 上海 201401
  • 收稿日期:2026-03-27 修回日期:2026-04-25
  • 通讯作者: 蔡传兵, 教授. E-mail: cbcai@t.shu.edu.cn
  • 作者简介:祖浩文(1999-), 男, 硕士研究生. E-mail: wtdyssb@163.com
  • 基金资助:
    国家自然科学基金(52172271, 52307026, 52477022); 国家重点研发计划(2022YFE03150200); 中国科学院超导项目(SCZX-0103)

Superconducting Properties of YBa2Cu3O7-δ Thin Films with the Incorporation of BaHfO3/BaZrO3 Nanocrystals

ZU Haowen1, HUANG Rongtie2, CHENG Jing1,2, LIU Yang2, LI Jihong2, CAI Chuanbing1,2   

  1. 1. Shanghai Key Laboratory of High Temperature Superconductors, College of Sciences, Shanghai University, Shanghai 200444, China;
    2. Shanghai Creative Superconductor Technologies Co. Ltd., Shanghai 201401, China
  • Received:2026-03-27 Revised:2026-04-25
  • Contact: CAI Chuanbing, professor. E-mail: cbcai@t.shu.edu.cn
  • About author:ZU Haowen (1999-), male, Master candidate. E-mail: wtdyssb@163.com
  • Supported by:
    National Natural Science Foundation of China (52172271, 52307026, 52477022); National Key R&D Program of China (2022YFE03150200); Superconductivity Project of the Chinese Academy of Sciences (SCZX-0103)

摘要: 预制纳米晶添加到金属有机沉积法(Metal Organic Deposition, MOD)制备的YBa2Cu3O7-δ(YBCO)超导薄膜中,可通过磁通钉扎作用有效地提高薄膜在磁场中的临界电流密度(Jc)。由于纳米晶的种类、初始尺寸和添加浓度对磁通钉扎效果具有显著影响,因此有必要系统对比研究不同纳米晶添加条件对YBCO薄膜生长质量与超导性能的影响。本研究制备了初始尺寸为6 nm和12 nm的BaHfO3(BHO)与BaZrO3(BZO)纳米晶,以5%和10%的摩尔百分比浓度添加至2.4 μm厚度的YBCO薄膜中,并对纳米晶添加后薄膜的生长质量与超导性能进行表征。结果表明,在77 K自场条件下,5%浓度纳米晶添加的薄膜临界电流(Ic)均超过600 A(12 mm宽度)。当外加磁场强度超过1 T时,在4.2、50和77 K三个温区内,10%浓度6 nm BHO纳米晶添加的薄膜在场性能最为优异, Jc达到14.28 MA/cm²(4.2 K, 3 T)。对比发现,在提升YBCO薄膜在场性能方面,10%浓度的纳米晶添加优于5%浓度的同类纳米晶。初始尺寸对BHO纳米晶的磁通钉扎效果影响较BZO纳米晶更为显著。本研究为优化MOD-YBCO薄膜中纳米晶添加方案、提高薄膜在场性能提供了实验依据。

关键词: YBa2Cu3O7-δ, 磁通钉扎, BaHfO3, BaZrO3

Abstract: Preformed nanocrystals incorporated into YBa2Cu3O7-δ (YBCO) superconducting thin films prepared by Metal Organic Deposition (MOD) method can effectively enhance the critical current density (Jc) under magnetic fields via flux pinning. The type, initial size, and incorporating concentration of the nanocrystals have significant effects on the flux pinning performance. Therefore, a systematic comparative study on the influence of different nanocrystal incorporation conditions on the growth quality and superconducting properties of YBCO films is required. In this study, BaHfO3 (BHO) and BaZrO3 (BZO) nanocrystals with initial sizes of 6 nm and 12 nm were prepared and incorporated into YBCO films with a thickness of 2.4 μm at molar concentrations of 5% and 10%. The growth quality and superconducting properties of the films after nanocrystal incorporation were systematically characterized. The experimental results showed that under 77 K self-field conditions, the critical current (Ic) of the films with 5% nanocrystal incorporation exceeded 600 A (12 mm width). When the applied magnetic field exceeds 1 T, the film with 10% 6 nm BHO nanocrystals exhibited the best in-field property across the temperature range of 4.2, 50, and 77 K, with the Jc reaching 14.28 MA/cm² (4.2 K, 3 T). Comparative analysis indicates that, in enhancing the in-field property of YBCO thin films, the incorporation of nanocrystals at 10% concentration is more effective than that at 5% for the same type of nanocrystals, and the initial size has a more pronounced effect on the flux pinning performance of BHO nanocrystals than that of BZO nanocrystals. This study provides experimental evidence for optimizing nanocrystal incorporation strategies to improve the in-field property of MOD-YBCO films.

Key words: YBa2Cu3O7-δ, flux pinning, BaHfO3, BaZrO3

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