MgB2 synthesis in closed volume and pinning potential
  Superconducting MgB2 was synthesized in a stainless steel tube which compressed by pulsed magnetic field. The temperature dependence of diamagnetic moment m(T) was investigated and the pinning potential was determined 
S.P. Ananev, V.A. Grinenko, V.A. Keilin, E.P. Krasnoperov, P.A. Levit,   V.A. Stoliarov