TY - JOUR
T1 - Enhancement of critical current density of Dy-Ba-Cu-O bulk superconductor by the refinement of Dy211 particles
AU - Nariki, S.
AU - Sakai, N.
AU - Murakami, M.
N1 - Funding Information:
This work is supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications under the New Sunshine Program administered by the Agency of Industrial Science and Technology (AIST) of the Ministry of International Trade and Industry (MITI) of Japan.
PY - 2001/8
Y1 - 2001/8
N2 - We have studied the relationship between the particle size of Dy2BaCuO5 (Dy211) starting powder in the precursor and the particle size of Dy211 inclusions trapped in the melt-textured bulk Dy-Ba-Cu-O. The mean diameter of Dy211 particles trapped in the DyBa2Cu3Oy could be reduced with decreasing the particle size of Dy211 starting powder. The Jc was increased with reducing the size of Dy211 secondary phase. The Jc of the bulk Dy-Ba-Cu-O sample with fine Dy211 inclusions 0.6 μm in size exhibited about 70 000 A/cm2 at 77 K and self-field. Large c-axis oriented Dy-Ba-Cu-O/Ag bulk sample could also be fabricated with the top-seeded melt-growth process in air. The trapped magnetic fields of the bulks with the diameters of 32 and 48 mm reached high values of 1.4 and 1.7 T at 77 K, respectively.
AB - We have studied the relationship between the particle size of Dy2BaCuO5 (Dy211) starting powder in the precursor and the particle size of Dy211 inclusions trapped in the melt-textured bulk Dy-Ba-Cu-O. The mean diameter of Dy211 particles trapped in the DyBa2Cu3Oy could be reduced with decreasing the particle size of Dy211 starting powder. The Jc was increased with reducing the size of Dy211 secondary phase. The Jc of the bulk Dy-Ba-Cu-O sample with fine Dy211 inclusions 0.6 μm in size exhibited about 70 000 A/cm2 at 77 K and self-field. Large c-axis oriented Dy-Ba-Cu-O/Ag bulk sample could also be fabricated with the top-seeded melt-growth process in air. The trapped magnetic fields of the bulks with the diameters of 32 and 48 mm reached high values of 1.4 and 1.7 T at 77 K, respectively.
KW - Critical current density
KW - Dy-Ba-Cu-O
KW - Melt processing
KW - Trapped magnetic field
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U2 - 10.1016/S0921-4534(01)00372-0
DO - 10.1016/S0921-4534(01)00372-0
M3 - Article
AN - SCOPUS:0035422760
SN - 0921-4534
VL - 357-360
SP - 814
EP - 816
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - SUPPL. 2
ER -