| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1817311 | Physica C: Superconductivity and its Applications | 2016 | 5 Pages |
•The superconductivity survives in Hg0.3La0.7Ba2Ca3(Cu1−xAgx)4O10+δ, even at x = 0.50.•The irreversibility line (IL) exhibits thermal activated behaviour.•The flux pinning of Hg0.3La0.7Ba2Ca3(Cu0.95Ag0.5)4O10+δ is discussed and compared with that of low Ag content (0.10 ≤ x ≤ 0.30).•A crossover from a two- to a three-dimensional system is suggested at T/Tc = 0.75 and a magnetic field, Hdc = 0.04 T. Mitsuhita's formula is verified for the investigated compound.•Based on vortex glass phase transition theory, the effective pinning energy, ueff, was calculated.
In this work, the temperature, magnetic field and frequency dependence of the ac susceptibility of Hg0.3La0.7Ba2Ca3(Cu0.95Ag0.5)4O10+δ were studied. The superconductivity still survives even at this amount of Ag. The magnetic field dependence of the irreversibility line (IL) and the flux pinning of this compound are discussed and compared with those of low Ag content. The IL exhibits thermally activated behaviour. A collective creep of the vortex bundle also occurs for this level of doping. A crossover from a two- to a three-dimensional system is suggested at T/Tc = 0.75 and a magnetic field, Hdc = 0.04 T. Based on vortex glass phase transition theory, the effective pinning energy, ueff, was calculated. The change in the characteristic temperature of the studied compound and that of low Ag content samples are summarised. Comparisons with similar materials are discussed.
