Thermodynamic and Transport Properties of Superconducting $Mg^{10}B_2$

Details Thermodynamic and Transport Properties of Superconducting $Mg^{10}B_2$ Thermodynamic and Transport Properties of Superconducting $Mg^{10}B_2$

2001-02-06

arxiv.org/abs/cond-mat/0102114v1

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevLett.86.2420

Transport and thermodynamic properties of a sintered pellet of the newly discovered $MgB_2$ superconductor have been measured to determine the characteristic critical magnetic fields and critical current densities. Both resistive transition and magnetization data give similar values of the upper critical field, $H_{c2}$, with magnetization data giving $dH_{c2}/dT=0.44~T/K$ at the transition temperature of $T_c=40.2 K$. Close to the transition temperature, magnetization curves are thermodynamically reversible, but at low temperatures the trapped flux can be on the order of one Tesla. The value of $dH_c/dT$ at $T_c$ is estimated to be about $12~mT/K$, a value similar to classical superconductors like Sn. Hence, the Ginsburg-Landau parameter $\kappa \sim 26$. Estimates of the critical supercurrent density, $J_c$, using hysteresis loops and the Bean model give critical current densities on the order of $10^5~A/cm^2$. Hence the supercurrent coupling through the grain boundaries is comparable to intermetallics like $Nb_3Sn$.

Affiliated with

Also associated with

No associations

Rating

Thermodynamic and Transport Properties of Superconducting $Mg^{10}B_2$ 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 Thermodynamic and Transport Properties of Superconducting $Mg^{10}B_2$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermodynamic and Transport Properties of Superconducting $Mg^{10}B_2$ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-461393