Anisotropic transport properties of Tl(1223) magnetically aligned ceramics and spray pyrolyzed films

Uniaxially textured TlBaSrCa/sub 2/Cu/sub 3/O/sub 9/ bulk ceramics have been fabricated by slip casting in magnetic fields up to 9 Tesla followed by sintering and reduction annealing. The measured transport properties are compared with those of spray pyrolyzed thick films where the degree of <001> texture is controlled through processing. Transport anisotropy is correlated to the degree of texture but not to the magnitude of the critical current density. In fact, although the critical current density of the aligned ceramic has the lowest value and is the most sensitive to small magnetic fields, it is also the most anisotropic with respect to the field direction. These data indicate that <001> texture is necessary but not sufficient for high critical current density in the Tl(1223) system.<>