TY - JOUR
T1 - Enhanced flux pinning in GdBaCuO bulk superconductors by Zr dopants
AU - Xu, C.
AU - Hu, A.
AU - Ichihara, M.
AU - Sakai, N.
AU - Izumi, M.
AU - Hirabayashi, I.
N1 - Funding Information:
This work was partly supported by Sasakawa Scientific Research Grant from Japan Science Society.
PY - 2007/10/1
Y1 - 2007/10/1
N2 - We, respectively, fabricated GdBa2Cu3O7-δ (Gd123) single domain superconductors by melt growth process in air with Gd2Ba4CuZrOx (GdZr2411) and nanosize ZrO2 dopants. The microstructures and superconducting properties were investigated by scanning/transmission electron microscopy (SEM/TEM) and SQUID. GdZr2411 and BaZrO3 particles with the average size of 50 nm were observed in the GdZr2411 and nanosize ZrO2 doped Gd123 bulks by TEM, respectively. Critical current density (Jc) was enhanced up to 100,000 A/cm2 at 77 K and self-field with 0.4 mol% nano-sized ZrO2. The present study also showed that small amount GdZr2411 dopants (8 mol%, ratio to Gd123) were effective to induce a δTc-type pinning.
AB - We, respectively, fabricated GdBa2Cu3O7-δ (Gd123) single domain superconductors by melt growth process in air with Gd2Ba4CuZrOx (GdZr2411) and nanosize ZrO2 dopants. The microstructures and superconducting properties were investigated by scanning/transmission electron microscopy (SEM/TEM) and SQUID. GdZr2411 and BaZrO3 particles with the average size of 50 nm were observed in the GdZr2411 and nanosize ZrO2 doped Gd123 bulks by TEM, respectively. Critical current density (Jc) was enhanced up to 100,000 A/cm2 at 77 K and self-field with 0.4 mol% nano-sized ZrO2. The present study also showed that small amount GdZr2411 dopants (8 mol%, ratio to Gd123) were effective to induce a δTc-type pinning.
KW - Dopant
KW - Gd123
KW - GdBaCuZrO
KW - Nanoparticles
KW - ZrO
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U2 - 10.1016/j.physc.2007.04.233
DO - 10.1016/j.physc.2007.04.233
M3 - Article
AN - SCOPUS:34548437069
SN - 0921-4534
VL - 463-465
SP - 367
EP - 370
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - SUPPL.
ER -