Enhanced Critical parameters of nano-Carbon doped MgB2 Superconductor

Physics – Condensed Matter – Superconductivity

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0


25 pages with 9 Figs: comments/suggestions(awana@mail.nplindia.ernet.in)

Scientific paper

The high field magnetization and magneto transport measurements are carried out to determine the critical superconducting parameters of MgB2-xCx system. The synthesized samples are pure phase and the lattice parameters evaluation is carried out using the Rietveld refinement. The R-T(H) measurements are done up to a field of 140 kOe. The upper critical field values, Hc2 are obtained from this data based upon the criterion of 90% of normal resistivity i.e. Hc2=H at which Rho=90%Rho; where RhoN is the normal resistivity i.e., resistivity at about 40 K in our case. The Werthamer-Helfand-Hohenberg (WHH) prediction of Hc(0) underestimates the critical field value even below than the field up to which measurement is carried out. After this the model, the Ginzburg Landau theory (GL equation) is applied to the R-T(H) data which not only calculates the Hc2(0) value but also determines the dependence of Hc2 on temperature in the low temperature high field region. The estimated Hc(0)=157.2 kOe for pure MgB2 is profoundly enhanced to 297.5 kOe for the x=0.15 sample in MgB2-xCx series. Magnetization measurements are done up to 120 kOe at different temperatures and the other parameters like irreversibility field, Hirr and critical current density Jc(H) are also calculated. The nano carbon doping results in substantial enhancement of critical parameters like Hc2, Hirr and Jc(H) in comparison to the pure MgB2 sample.

No associations


Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.


Enhanced Critical parameters of nano-Carbon doped MgB2 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 Enhanced Critical parameters of nano-Carbon doped MgB2 Superconductor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhanced Critical parameters of nano-Carbon doped MgB2 Superconductor will most certainly appreciate the feedback.

Rate now


Profile ID: LFWR-SCP-O-100628

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.