Abstract
The influence of KClO3 addition on the magnetic properties and microstructural parameters (grain size, grain boundaries) of high-temperature superconductors (HTSC) with nominal composition Y(1-0.2x)Ba(2-0.2x)KxCu3Oy (x = 0-0.40) were investigated. The ac complex susceptibility χac = χ′ - iχ″ was recorded as a function of temperature and concentration of KClO3 at various ac magnetic fields up to 2 mT. The data were analysed using the relation h = a(1 - Tm/Tc)n, where Tm represents the intergranular peak temperature of the imaginary component χ″. The value of a is found to increase for doped samples, which suggests enhanced flux pinning due to the KClO3 addition. The dc susceptibility as a function of temperature was measured by means of a SQUID magnetometer in field-cooled cooling (FCC) and field-cooled warming (FCW) modes in magnetic fields in the range 10 mT ≤ μ0Ha ≤ 7 T on KClO3-doped and pure YBCO samples. The Meissner curves reveal that the samples are single phase in all applied fields, but the low-temperature behaviour of the samples with KClO3 additions is different from that of pure YBCO.
Original language | English |
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Pages (from-to) | 807-810 |
Number of pages | 4 |
Journal | Superconductor Science and Technology |
Volume | 13 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2000 Jun 1 |
Externally published | Yes |
Event | The 2nd International Workshop on the Processing and Applications of Superconducting (RE)CBO Large Grain Materials - Morioka, Jpn Duration: 1999 Oct 19 → 1999 Oct 22 |
ASJC Scopus subject areas
- Ceramics and Composites
- Condensed Matter Physics
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry