The tetragonal CaLaBaCu3Oy and LnSrBaCu(3)O(y) (Ln = Dy, Eu, Gd) sampl
es were prepared and their transport properties were measured in detai
l. The reentrant transition below usual transition temperature were co
nfirmed for the samples, CaLaBaCu3Oy, GdSrBaCu3Oy and EuSrBaCu3Oy whic
h are phenomenologically similar to those in magnetic superconductors.