TY - JOUR
T1 - Superconducting properties and pinning mechanism of filamentary (Sm,Gd,Dy)–Ba–Cu–O doped with Co
AU - Ikebe, Y.
AU - Awaji, S.
AU - Ban, E.
N1 - Funding Information:
This study was performed at the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University.
Funding Information:
This study was funded by Meijo University. This study was collaborated with the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University.
Publisher Copyright:
© 2022
PY - 2022/3/15
Y1 - 2022/3/15
N2 - In this work, the effect of cobalt (Co) doping on the superconducting properties of filamentary (Sm1/3Gd1/3Dy1/3)1.18Ba2.12Cu3.09−xCoxOy (SGD123, x = 0 − 1.20) superconductors was investigated using samples prepared using a solution spinning method. Its pinning mechanism was also examined. The Co-doped x = 5.0 × 10−4 and 1.0 × 10−3 samples obtained a Jc value higher than that of the pure sample, although the Tc value of the SGD123 filaments slightly decreased with increasing Co content. The anisotropic behavior of the field dependence of the transport Jc can hardly be confirmed for the pure sample. The superconductivity of the pure sample disappeared at an applied magnetic field approximately 12 T, at most. In contrast, Co-doped x = 1.0 × 10−3 sample showed the angular dependence of the transport Jc in an applied magnetic field. Furthermore, the Co-doped x = 1.0 × 10−3 sample rotated at 90° maintained a Jc value higher than 103 A cm−2 in a magnetic field up to 17.5 T. Co doping was effective in enhancing Jc at self-field and high magnetic field. In addition, we attempted to elucidate the pinning mechanism of Co on the Jc enhancement of the SGD123 filament using scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy measurements.
AB - In this work, the effect of cobalt (Co) doping on the superconducting properties of filamentary (Sm1/3Gd1/3Dy1/3)1.18Ba2.12Cu3.09−xCoxOy (SGD123, x = 0 − 1.20) superconductors was investigated using samples prepared using a solution spinning method. Its pinning mechanism was also examined. The Co-doped x = 5.0 × 10−4 and 1.0 × 10−3 samples obtained a Jc value higher than that of the pure sample, although the Tc value of the SGD123 filaments slightly decreased with increasing Co content. The anisotropic behavior of the field dependence of the transport Jc can hardly be confirmed for the pure sample. The superconductivity of the pure sample disappeared at an applied magnetic field approximately 12 T, at most. In contrast, Co-doped x = 1.0 × 10−3 sample showed the angular dependence of the transport Jc in an applied magnetic field. Furthermore, the Co-doped x = 1.0 × 10−3 sample rotated at 90° maintained a Jc value higher than 103 A cm−2 in a magnetic field up to 17.5 T. Co doping was effective in enhancing Jc at self-field and high magnetic field. In addition, we attempted to elucidate the pinning mechanism of Co on the Jc enhancement of the SGD123 filament using scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy measurements.
KW - Co doping
KW - Critical current density
KW - Ternary (Sm,Gd,Dy)–Ba–Cu–O superconducting filament
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U2 - 10.1016/j.physc.2022.1354020
DO - 10.1016/j.physc.2022.1354020
M3 - Article
AN - SCOPUS:85122999273
SN - 0921-4534
VL - 594
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
M1 - 1354020
ER -