Growth-related profiles of remanent flux in bulk melt-textured YBaCuO crystal magnetized by pulsed fields

摘要

We have studied the remanent magnetic flux distribution in bulk melt-textured YBa_2Cu_3O_(7-#delta#) (YBCO) crystals after their magnetization in quasi-static and pulsed magnetic fields up to 6 T. It has been shown that, provided the magnetic pulse is sharp enough and its amplitude greatly exceeds twice the penetration magnetic field, the pulse magnetization technique becomes extremely sensitive to sample inhomogeneities. Using this method with appropriate parameters of the magnetic pulse, we have demonstrated, in particular, that the growth of YBCO crystals in the growth sectors respond to a macroscopic arrangement of weak links.(Some figures in this article are in colour only in the electronic version)