Critical state analysis in MgB2 bulk by means of quantitative MO technique

Details Critical state analysis in MgB2 bulk by means of quantitative MO technique Critical state analysis in MgB2 bulk by means of quantitative MO technique

2001-04-04

arxiv.org/abs/cond-mat/0104069v1

Physics

Condensed Matter

Superconductivity

6 pages, 7 figures

Scientific paper

10.1080/13642810110084957

An extended magneto-optical (MO) analysis of samples cut from high-density pellets of MgB2 is reported. For sake of comparison some magnetic measurements and critical values are also shown. Notwithstanding the fact that the optical and SEM images exhibit grains with different shape and size, all the samples investigated by MO analysis (three specimens of different shape and size) enter as a whole into a critical state. The current at different temperatures and fields, in a phase zone accessible to MO are calculated by means of a quantitative analysis. The analysis, based on the inversion of the Biot-Savart law, corresponds to three regimes: under-critical, critical and over-critical, respectively. A possible qualitative interpretation of the absence of magnetic granularity is given in the framework of a critical state likely reached by a network of strongly coupled Josephson Junctions.

Affiliated with

Also associated with

No associations

Rating

Critical state analysis in MgB2 bulk by means of quantitative MO technique 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 Critical state analysis in MgB2 bulk by means of quantitative MO technique, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Critical state analysis in MgB2 bulk by means of quantitative MO technique will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-291779