X. Chaud et al., ROLE OF OXYGEN ON YBACUO SOLIDIFICATION AS SEEN FROM HIGH-TEMPERATUREIN-SITU SUSCEPTIBILITY MEASUREMENTS, Physica. C, Superconductivity, 235, 1994, pp. 433-434
YBaCuO solidification in a strong magnetic field has been studied with
the help of high temperature magnetometry. While solidifying crystall
ites are all aligned with their c-axis parallel to the applied field,
leading to an overall textured material, grain size enhancement requir
es an adequate process such as MTG. In situ magnetic susceptibility of
materials being processed allows the monitoring of all phase transiti
ons encountered. The triggering effect of oxygen uptake on solidificat
ion is evidenced. Control of the solidification through magnetic susce
ptibility has led to large grains, high performances materials for app
lications such as magnetic bearings.