Malmivirta, Mika and Jyrinki, Jaakko and Huhtinen, Hannu and Pan, Alexey V. and Rubanov, Sergey and Jha, R. and Awana, V. P. S. and Paturi, Petriina (2017) A Structural Optimization of Ferrite/YBCO Bilayers. IEEE Transactions on Applied Superconductivity, 27 (4). 8000705-1-8000705-5. ISSN 1051-8223

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Magnetic particles can be used to take advantage of both defect and magnetic pinning in high-temperature superconductors. We combined layers of ferrite+cerium oxide with YBCO to see their effect both on the structure of the YBCO and on flux pinning. The deposition temperature of the ferrite greatly affects its structure and also the saturation magnetization. Combined with YBCO, the magnetic layer distorts the structure of YBCO, although, for example, the critical temperature remains rather unchanged. According to the structural results achieved here, the magnetic pinning layer is best positioned on the top of YBCO. This way, an improvement in J(c)(B) is seen in all the field range, and also, a clear improvement of the accommodation field was measured. However, it does not play a huge role whether the ferrite is CoFe2O4, NiFe2O4, or ZnFe2O4, all mixed with CeO2.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Institute of Electrical and Electronics Engineers.
Subjects: Engineering > Electronics and Electrical Engineering
Applied Physics/Condensed Matter
Depositing User: Users 27 not found.
Date Deposited: 20 Aug 2018 08:43
Last Modified: 20 Aug 2018 08:43

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