Abstract
Magnetic decoration of BaFe2(As1-xPx) 2 revealed an hexagonal vortex lattice in overdoped single crystals (x>0.4, Tc=14-18 K). A disordered vortex lattice was observed in a crystals with optimal content of phosphorus (x 0.4, Tc 25-30 K). Magneto-optical studies and global magnetization measurement of the optimally-doped crystal have led to an estimated critical current density of ∼ 105A/cm2 at 5-12 K in fields up to 0.7 T. This high critical current density suggests strong pinning, probably due to defects, a result consistent with the observed disordered vortex lattice. The critical current density of the overdoped crystal is much smaller, i.e. ∼ 10 4 A/cm2 at 5 K in fields up to 0.1 T, decreasing to virtually zero at 0.3 T.
Original language | English |
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Article number | 012013 |
Journal | Journal of Physics: Conference Series |
Volume | 507 |
Issue number | PART 1 |
DOIs | |
State | Published - 2014 |
Event | 11th European Conference on Applied Superconductivity, EUCAS 2013 - Genoa, Italy Duration: 15 Sep 2013 → 19 Sep 2013 |
Funding
Funders | Funder number |
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Russian Foundation for Basic Research | 110292480 |