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Chin. Phys. B, 2023, Vol. 32(2): 027401    DOI: 10.1088/1674-1056/ac7a13

Effect of thickness on magnetic properties of single domain GdBCO bulk superconductors

Ping Gao(高平)1,2, Wan-Min Yang(杨万民)2,†, Ting-Ting Wu(武婷婷)2, Miao Wang(王妙)3, and Kun Liu(刘坤)2
1 Department of Physics, LvLiang University, Lvliang 033001, China;
2 College of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China;
3 School of Science, Xi'an Aeronautical University, Xi'an 710062, China
Abstract  To study the influence of thickness on the magnetic properties of ReBCO (Re=Y, Gd, Sm, Nd, etc.) bulk superconductors, a single domain gadolinium barium copper oxide (GdBCO) bulk superconductor fabricated by the Re+ 011 top seeded infiltration growth (Re+ 011 TSIG) method was continuously sliced along the bottom to obtain samples of different thickness. The levitation force and attractive force of these samples were tested at 77 K in the zero-field-cooled (ZFC) state. It is found that as the sample thickness decreases, the levitation force decreases gradually whereas the attractive force increases. This is related to the varied ability to resist the penetration of magnetic field occasioned by varying sample thickness, which are deeply revealed by combining with the characteristics of the non-ideal type-I!I superconductor. Further, the levitation force exhibits a trend of slow initial change followed by rapid change, which may be attributed to the growth of the sample. Measurement of the trapped field shows that a similar distribution of trapped field at the top and bottom surfaces can be achieved by removing some materials from the bottom of the bulk. These results provide a reference for meeting the actual requirements of ReBCO bulks of different thicknesses and greatly contribute to practical designs and applications.
Keywords:  single domain GdBCO bulk superconductor      levitation force      attractive force  
Received:  10 April 2022      Revised:  15 June 2022      Accepted manuscript online:  18 June 2022
PACS:  74.72.-h (Cuprate superconductors)  
  74.81.Bd (Granular, melt-textured, amorphous, and composite superconductors)  
  74.25.-q (Properties of superconductors)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 52072229), the Key-grant Project of the Ministry of Education of China (Grant No. 311033), the Fundamental Research Funds for the Central Universities (Grant No. GK201706001), and the Teaching Reform and Innovation Project of Higher Education in Shanxi Province, China (Grant No. J2021719).
Corresponding Authors:  Wan-Min Yang     E-mail:

Cite this article: 

Ping Gao(高平), Wan-Min Yang(杨万民), Ting-Ting Wu(武婷婷), Miao Wang(王妙), and Kun Liu(刘坤) Effect of thickness on magnetic properties of single domain GdBCO bulk superconductors 2023 Chin. Phys. B 32 027401

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