Evidence for Transition Temperature Fluctuation Induced Pinning im MgB$_2$ Superconductor

Details Evidence for Transition Temperature Fluctuation Induced Pinning im MgB$_2$ Superconductor Evidence for Transition Temperature Fluctuation Induced Pinning im MgB$_2$ Superconductor

2001-08-10

arxiv.org/abs/cond-mat/0108172v1

Physics

Condensed Matter

Superconductivity

11 pages, 6 figures

Scientific paper

The magnetic field dependent critical current density $j_c(B)$ of a MgB$_2$ bulk sample has been obtained by means of magnetization hysteresis measurements. The $j_c(B)$ curves at different temperatures demonstrate a crossover from single vortex pinning to small-bundle vortex pinning, when the field is larger than the crossover field $B_{sb}$. The temperature dependence of the crossover field $B_{sb}(T)$ is in agreement with a model of randomly distributed weak pinning centers via the spatial fluctuations of the transition temperature ($\delta T_c$-pinning), while pinning due to the mean free path fluctuations ($\delta l$-pinning) is not observed.

Affiliated with

Also associated with

No associations

Rating

Evidence for Transition Temperature Fluctuation Induced Pinning im MgB$_2$ Superconductor 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 Evidence for Transition Temperature Fluctuation Induced Pinning im MgB$_2$ Superconductor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for Transition Temperature Fluctuation Induced Pinning im MgB$_2$ Superconductor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-149584