TY - JOUR
T1 - Enhanced critical current density in the BSCCO single crystal grown by the traveling solvent floating zone method
AU - Chikumoto, N.
AU - Furusawa, K.
AU - Murakami, M.
N1 - Funding Information:
The authors acknowledge Dr. J. Matsuda for TEM observation. This work was supported by the New Energy and Industrial Technology Department Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.
PY - 2004/10
Y1 - 2004/10
N2 - We have successfully grown BSCCO single crystals showing high critical current density of 2×106 A/cm2 at 20 K. Magneto-optical observation showed that the sample exhibited inhomogeneous penetration of magnetic flux correlated with the crystal b-axis. According to compositional analyses using wave-dispersive spectrometry (WDS), the crystals consisted of two phases, for which the Ca content was slightly different. It was also found that the values of the overall critical current density derived from the magnetization measurements depend on the portion of these two regions. Transmission electron microscopy revealed that strong pinning materials contain the region with a short incommensulate modulation period compared to the previously reported values, which might be responsible for extremely high J c values.
AB - We have successfully grown BSCCO single crystals showing high critical current density of 2×106 A/cm2 at 20 K. Magneto-optical observation showed that the sample exhibited inhomogeneous penetration of magnetic flux correlated with the crystal b-axis. According to compositional analyses using wave-dispersive spectrometry (WDS), the crystals consisted of two phases, for which the Ca content was slightly different. It was also found that the values of the overall critical current density derived from the magnetization measurements depend on the portion of these two regions. Transmission electron microscopy revealed that strong pinning materials contain the region with a short incommensulate modulation period compared to the previously reported values, which might be responsible for extremely high J c values.
KW - Bi2212
KW - Critical current density
KW - Magneto-optical imaging
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U2 - 10.1016/j.physc.2004.01.069
DO - 10.1016/j.physc.2004.01.069
M3 - Article
AN - SCOPUS:4644337915
VL - 412-414
SP - 463
EP - 466
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - SPEC. ISS.
ER -