正负错配纳米颗粒掺杂对YBCO薄膜性能影响的研究

doi:10.15541/jim20180491

无机材料学报 ›› 2019, Vol. 34 ›› Issue (8): 857-861.DOI: 10.15541/jim20180491

正负错配纳米颗粒掺杂对YBCO薄膜性能影响的研究

王雅,索红莉(),刘敏,王田田,KAUSARShaheen,徐燕,马麟

北京工业大学材料科学与工程学院, 新型功能材料教育部重点实验室, 北京 100124

收稿日期:2018-10-17 修回日期:2019-01-17 出版日期:2019-08-20 网络出版日期:2019-05-29
作者简介:王雅(1993-), 女, 硕士研究生. E-mail: pugongying@emails.bjut.edu.cn
基金资助:
北京市自然科学基金(2171008);国家自然科学基金(51571002);北京市教育委员会科技发展总项目(KM201810005010)

Property of YBCO Films Doping with Positive and Negative Lattice Mismatch Nanoparticles

WANG Ya,SUO Hong-Li(),LIU Min,WANG Tian-Tian,KAUSAR Shaheen,XU Yan,MA Lin

The Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100124, China

Received:2018-10-17 Revised:2019-01-17 Published:2019-08-20 Online:2019-05-29
Supported by:
Beijing Natural Science Foundation(2171008);National Natural Science Foundation of China(51571002);Beijing Municipal Education Commission Science and Technology Development Project(KM201810005010)

摘要/Abstract

摘要：

利用低氟MOD工艺制备了Ba₂YTaO₆(BYTO)单一纳米颗粒掺杂及BYTO和LaAlO₃(LAO)双纳米颗粒共掺杂的YBCO复合薄膜。研究表明BYTO在YBCO薄膜中的最优掺杂量为6mol%, 此时薄膜的自场J_c为1.25 MA/cm ², 在1.2 T下获得的最大钉扎力为3.02 GN/m ³。共掺杂试验中引入与YBCO具有正错配度的BYTO粒子和负错配度的LAO粒子, 两者相互作用使有效掺杂总量提高至10mol%。调整两种纳米粒子的配比发现6mol% BYTO+4mol% LAO掺杂的YBCO复合薄膜样品在外加磁场为2 T时, J_c值高达0.27 MA/cm ², 获得最大钉扎力时的磁场由纯YBCO薄膜的0.42 T提高至共掺杂的1.6 T, 此时最大钉扎力为5.6 GN/m ³。正负错配纳米颗粒共掺杂有效地提高了YBCO复合薄膜在外加磁场下的超导性能。

关键词: 正负错配, 纳米颗粒, 钉扎力, 掺杂量

Abstract:

The YBCO composite films doped with Ba₂YTaO₆ (BYTO) single nanoparticles and BYTO/LaAlO₃(LAO) double nanoparticles were prepared by low-fluorine MOD process. The result showed that the optimum doping amount of BYTO in YBCO film was 6mol%, when the self-field J_c of this film was 1.25 MA/cm ², and the maximum pinning force was 3.02 GN/m ³ at 1.2 T. In the co-doping experiment, BYTO particles with positive lattice mismatch with YBCO and LAO particles with negative lattice mismatch with YBCO were introduced, and the interaction between two particles increased effective doping amount up to 10mol%. With adjustment of the ratio of the two kinds of nanoparticles, it was found that the 6mol% BYTO+4mol% LAO-doped YBCO composite films had a J_c value as high as 0.27 MA/cm ² when the magnetic field was 2 T. This magnetic field in which the maximum pinning force was obtained, increased from 0.42 T for pure YBCO to 1.6 T for codoping, in which the maximum pinning force was 5.6 GN/m ³. The co-doping with positive and negative lattice mismatch nanoparticle effectively improves the superconductivity of YBCO composite film under applied magnetic field.

Key words: positive and negative lattice mismatch, nanoparticles, pinning force, doping amount

中图分类号:

TQ174

王雅, 索红莉, 刘敏, 王田田, KAUSARShaheen, 徐燕, 马麟. 正负错配纳米颗粒掺杂对YBCO薄膜性能影响的研究[J]. 无机材料学报, 2019, 34(8): 857-861.

WANG Ya, SUO Hong-Li, LIU Min, WANG Tian-Tian, KAUSAR Shaheen, XU Yan, MA Lin. Property of YBCO Films Doping with Positive and Negative Lattice Mismatch Nanoparticles[J]. Journal of Inorganic Materials, 2019, 34(8): 857-861.

图/表 8

图1 BYTO/YBCO复合薄膜的XRD图谱

Fig. 1 XRD pattern of BYTO/YBCO film

图2 BYTO纳米颗粒含量对BYTO/YBCO复合薄膜织构的影响

Fig. 2 Effect of the contents of BYTO nanoparticles on texture of BYTO/YBCO namocomposite film

图3 不同掺杂含量BYTO/YBCO复合薄膜的Jc(a)和Fp(b)随外加磁场的变化关系

Fig. 3 Field dependence of Jc (a) and Fp (b) values for BYTO/YBCO films with different doping contents

图4 LAO掺杂含量对(BYTO+LAO)/YBCO复合薄膜织构的影响

Fig. 4 Effect of the contents of LAO on texture of (BYTO+LAO)/YBCO namocomposite film

图5 6mol% BYTO(a)、6mol% BYTO+2mol% LAO(b)、6mol% BYTO+4mol% LAO(c)、6mol% BYTO+6mol% LAO(d)掺杂的YBCO复合薄膜的SEM照片

Fig. 5 SEM images of YBCO composite films doped with 6mol% BYTO (a), 6mol% BYTO + 2mol% LAO (b),6mol% BYTO + 4mol% LAO (c), 6mol% BYTO + 6mol% LAO (d)

图6 不同掺杂含量的(BYTO+LAO)/YBCO复合薄膜的Jc(a)和Fp(b)随外加磁场的变化关系

Fig. 6 Field dependence of Jc (a) and Fp (b) values for (BYTO+LAO)/YBCO films with different doping contents

图7 不同掺杂比例的(BYTO+LAO)/YBCO复合薄膜的Jc(a)和Fp(b)随外加磁场的变化关系

Fig. 7 Field dependence of Jc (a) and Fp (b) values for (BYTO+LAO)/YBCO films with different doping ratio

图8 YBCO、6mol% BYTO、6mol% BYTO+4mol% LAO薄膜电阻随温度的变化关系

Fig. 8 Dependence of resistance on temperature for the YBCO, 6mol% BYTO and 6mol% BYTO+4mol% LAO films

参考文献 11

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正负错配纳米颗粒掺杂对YBCO薄膜性能影响的研究

Property of YBCO Films Doping with Positive and Negative Lattice Mismatch Nanoparticles

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