Abstract
The volume pinning forces, Fp, of several high-Tc superconductors are compared to each other using literature data and to those obtained in NdBa2Cu3O7-δ samples. It is shown that the pinning at small normal inclusions which is dominant in most high-Tc systems, leads to a peak at around 0.3 when plotting the normalized volume pinning forces, Fp/Fp,max, versus the reduced field defined by h = H/Hirr. Furthermore, relaxation effects play a significant role in the Fp diagrams, especially in the high h regions thus causing the typical rounded-off 'tail'. In contrast to this, NdBCO shows the peak at ≈0.5, thus indicating a strong pinning at small superconducting regions (ΔK/ΔTc-pinning).
Original language | English |
---|---|
Pages (from-to) | 2193-2194 |
Number of pages | 2 |
Journal | Physica C: Superconductivity and its applications |
Volume | 282 |
Issue number | PART 4 |
DOIs | |
Publication status | Published - 1997 Aug |
Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering