Enhanced pinning in high-temperature superconducting cuprate single crystals at low magnetic field
Low density flux dynamics in Nd based cuprate (NdBa₂Cu₃O₇₋x) HTSC single crystals trapped in ≈1 Oe range DC magnetic fields were investigated for the first time. Complex measurements of time, temperature and field dependence of magnetization were performed. Using the results obtained and the Anderso...
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| Published in: | Functional Materials |
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| Date: | 2013 |
| Main Authors: | , , |
| Format: | Article |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/119779 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Enhanced pinning in high-temperature superconducting cuprate single crystals at low magnetic field / V.Yu. Monarkha, Yu.A. Savina, V.P. Timofeev // Functional Materials. — 2013. — Т. 20, № 1. — С. 5-9. — Бібліогр.: 13 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | Low density flux dynamics in Nd based cuprate (NdBa₂Cu₃O₇₋x) HTSC single crystals trapped in ≈1 Oe range DC magnetic fields were investigated for the first time. Complex measurements of time, temperature and field dependence of magnetization were performed. Using the results obtained and the Anderson-Kim model the normalized magnetization relaxation rate S and the averaged effective pinning potential U were calculated. We show a significant increase in the effective pinning potential in comparison with measurements performed in high magnetic fields for similar cuprate single crystals formerly. In a wide enough range of temperatures close to Tc (0.72≤ T/Tc≤ 0.93) it has been shown that the doping of NdBa₂Cu₃O₇₋x single crystals with calcium atoms leads to an increase of the averaged effective pinning potential with an insignificant decreasing of the critical temperature.
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