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Vortex dynamics and irreversibility line in optimally doped SmFeAsO(0.8)F(0.2) from ac susceptibility and magnetization measurements
Vortex dynamics and irreversibility line in optimally doped SmFeAsO(0.8)F(0.2) from ac susceptibility and magnetization measurements
- Publication Year :
- 2011
- Publisher :
- American Institute of Physics:2 Huntington Quadrangle, Suite 1NO1:Melville, NY 11747:(800)344-6902, (631)576-2287, EMAIL: subs@aip.org, INTERNET: http://www.aip.org, Fax: (516)349-9704, 2011.
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Abstract
- Ac susceptibility and static magnetization measurements were performed in the optimally doped SmFeAsO$_{0.8}$F$_{0.2}$ superconductor. The field - temperature phase diagram of the superconducting state was drawn and, in particular, the features of the flux line lattice derived. The dependence of the intra-grain depinning energy on the magnetic field intensity was derived in the thermally-activated flux creep framework, enlightening a typical 1/H dependence in the high-field regime. The intra-grain critical current density was extrapolated in the zero temperature and zero magnetic field limit, showing a remarkably high value $J_{c0}(0) \sim 2 \cdot 10^{7}$ A/cm$^{2}$, which demonstrates that this material is rather interesting for the potential future technological applications.<br />6 pages, 6 figures
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....2c440af444fbe32b6da0a651104f74a3