Comparison of the temperature and field dependencies of the critical current densities of bulk YBCO, MgB2 and iron-based superconductors

We compare the temperature and field dependence of the critical current densities of high-Tc superconductor materials intended for various bulk applications like trapped-field magnets. This comprises bulk samples of YBa2Cu3Ox (YBCO), MgB2 and iron-based materials, including also various versions of...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2019-08, Vol.29 (5), p.1-5
Main Authors: Koblischka-Veneva, Anjela, Koblischka, Michael Rudolf, Berger, Kévin, Nouailhetas, Quentin, Douine, Bruno, Miryala, Muralidhar, Murakami, Masato
Format: Article
Language:English
Subjects:
Condensed Matter
Electric power
Engineering Sciences
Materials Science
Physics
Superconductivity
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Summary:We compare the temperature and field dependence of the critical current densities of high-Tc superconductor materials intended for various bulk applications like trapped-field magnets. This comprises bulk samples of YBa2Cu3Ox (YBCO), MgB2 and iron-based materials, including also various versions of the YBCO compound like melt-textured ones, infiltration-growth processed ones, and YBCO foams. Critical current densities and flux pinning forces were obtained from magnetization loops measured using Quantum Design SQUID and PPMS systems with applied magnetic fields of up to ±9 T. The obtained data are compared to each other with respect of the optimal cooling temperature possible using modern cryocoolers. Furthermore, we plot the temperature dependencies of the critical current densities versus the normalized temperature t = T /Tc. This enables a direct judgement of the performance of the material in the trapped field applications.
ISSN:1051-8223
DOI:10.1109/TASC.2019.2900932