High-Quality Single-Domain SmBCO Bulks Prepared by a Sm+011 SIG Technique With New Solid Phase in Air

High-quality single-domain SmBCO bulks have been successfully produced in air by a new Sm+011 SIG method, with a new solid phase of (Sm
₂
O
₃
+ xBaCuO
₂
) and a liquid phase of (Y
₂
O
₃
+ 6CuO + 10BaCuO
₂
). The onset critical temperature (Tcon) of the SmBCO bulks increases with the increasing of x; the Tcon have reached 96 K when x = 1.4. The amount and the size of Sm211 particles in the samples decreases with the increasing of BaCuO
₂
addition x. The levitation force of the samples (φ20 mm) increases from 38.47 to 44.34 N and decreases to 37.94 N with the increasing of x from 0.9 to 1.2 and 1.4. Single-domain SmBCO bulks (φ32 × 8.4 mm) with a levitation force of 98.7 N (77 K, 0.5 T) and a trapped field of 1.15 T (77 K) have been fabricated by the new Sm+011 SIG method. This result provides a very important way to fabricate high-quality single-domain SmBCO bulks in air.