Courant critique continu supérieur à 1 000 A dans un supraconducteur texturé par fusion de zone sous champ magnétique

Texturation of YBa~CU~O~_, has been achieved in a zone melting apparatus in a magnetic field, A strong vertical thermal gradient, along which samples are pulled combined with a horizontal magnetic field of 5 teslas induces cristallite alignment with their la, b) planes Perpendicular to the magnetic field and parallel to the thermal gradient. At H= 0T and T 77 K, a dc current of 000 A passed through a multigrain sample of 13 mm~ section and 20 mm length, thus proving the quality of grain boundaries. 200 A currents also passed through in H 8 T (H L I for a large angular range between H and (a, b planes. These preliminary results are encouraging for possible practical applications of large sized textured bar samples.