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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

Authors :
Prando G.
Carretta P.
De Renzi R.
Palenzona A.
Putti M.
Tropeano M.
SANNA, SAMUELE
Prando, G.
Carretta, P.
De Renzi, R.
Sanna, Samuele
Palenzona, A.
Putti, M.
Tropeano, M.
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.

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