Magnetic moment of welded HTS samples: dependence on the current flowing   through the welds
  We present a method to calculate the magnetic moments of the high-temperature superconducting (HTS) samples which consist of a few welded HTS parts. The approach is generalized for the samples of various geometrical shapes and an arbitrary number of welds. The obtained relations between the sample moment and the density of critical current, which flows through the welds, allow to use the magnetization loops for a quantitative characterization of the weld quality in a wide range of temperatures and/or magnetic fields. 
A.B.Surzhenko, M.Zeisberger, T.Habisreuther, D.Litzkendorf and   W.Gawalek