Intergranular pinning potential and critical current in the magnetic superconductor RuSr2Gd1.5Ce0.5Cu2O10

Details Intergranular pinning potential and critical current in the magnetic superconductor RuSr2Gd1.5Ce0.5Cu2O10 Intergranular pinning potential and critical current in the magnetic superconductor RuSr2Gd1.5Ce0.5Cu2O10

2004-10-15

arxiv.org/abs/cond-mat/0410396v2

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures. To appear in Physical Review B

Scientific paper

10.1103/PhysRevB.71.064520

The intergranular pinning potential U and the critical current density Jc for polycrystalline RuSr2Gd1.5Ce0.5Cu2O10 ruthenate-cuprate were determined at zero magnetic field and temperature through the frequency shift in the peak of the imaginary part of the ac magnetic susceptibility, X". A critical state model, including a flux creep term, was found to accurately describe the X" behavior. The obtained values, U(H=0,T=0) ~ 30 meV and Jc(H=0,T=0) ~ 110 A/cm^2 are about two orders of magnitude and four times lower, respectively, in comparison with the high-Tc cuprate YBa2Cu3O7. These results were ascribed to the effects of the Ru magnetization on the connectivity of the weak-linked network, giving an intrinsic local field at the junctions of ~ 15 Oe. The impact on Jc is less intense because of the small average grain radius (~1 micrometer). The intragranular London penetration length at T = 0, [lambda_L(0) ~ 2 micrometer], was derived using a Kim-type expression for the field dependence of Jc. A possible source for the large value of lambda_L in comparison to the high-Tc cuprates is suggested to come from a strong intragrain granularity, due to structural domains of coherent rotated RuO6 octahedra separated by antiphase boundaries.

Affiliated with

Also associated with

No associations

Rating

Intergranular pinning potential and critical current in the magnetic superconductor RuSr2Gd1.5Ce0.5Cu2O10 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Intergranular pinning potential and critical current in the magnetic superconductor RuSr2Gd1.5Ce0.5Cu2O10, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intergranular pinning potential and critical current in the magnetic superconductor RuSr2Gd1.5Ce0.5Cu2O10 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-289773