Correlated vortex pinning in Si-nanoparticle doped MgB2

Details Correlated vortex pinning in Si-nanoparticle doped MgB2 Correlated vortex pinning in Si-nanoparticle doped MgB2

2003-11-18

arxiv.org/abs/cond-mat/0311425v1

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1016/j.ssc.2004.09.035

The magnetoresistivity and critical current density of well characterized Si-nanoparticle doped and undoped Cu-sheathed MgB$_{2}$ tapes have been measured at temperatures $T\geq 28$ K in magnetic fields $B\leq 0.9$ T. The irreversibility line $B_{irr}(T)$ for doped tape shows a stepwise variation with a kink around 0.3 T. Such $B_{irr}(T)$ variation is typical for high-temperature superconductors with columnar defects (a kink occurs near the matching field $% B_{\phi}$) and is very different from a smooth $B_{irr}(T)$ variation in undoped MgB$_{2}$ samples. The microstructure studies of nanoparticle doped MgB$_{2}$ samples show uniformly dispersed nanoprecipitates, which probably act as a correlated disorder. The observed difference between the field variations of the critical current density and pinning force density of the doped and undoped tape supports the above findings.

Affiliated with

Also associated with

No associations

Rating

Correlated vortex pinning in Si-nanoparticle doped MgB2 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 Correlated vortex pinning in Si-nanoparticle doped MgB2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Correlated vortex pinning in Si-nanoparticle doped MgB2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-339895