TY - JOUR
T1 - Microstructure and critical current density of Bi2212 tapes grown by magnetic melt-processing
AU - Maeda, H.
AU - Ohya, K.
AU - Sato, M.
AU - Chen, W. P.
AU - Watanabe, K.
AU - Motokawa, M.
AU - Matsumoto, A.
AU - Kumakura, H.
AU - Schwartz, J.
N1 - Funding Information:
This research is a part of the project “Creation of Novel Materials in High Magnetic Fields” supported by the Japan Science and Technology Corporation.
PY - 2002/10/15
Y1 - 2002/10/15
N2 - Vertical magnetic fields up to 9 T were applied to the magnetic melt-processing (MMP) of dip-coated and Ag-sheathed Bi2212 mono-core tapes with a core thickness of about 150 μm, which were set horizontally. SEM observation shows that a uniform high-degree of texture is formed throughout the thickness of the tapes by the magnetic field Ha during MMP, whereas a large portion of the area is non-textured without Ha. The critical current density Jc of the tapes increases with increasing Ha up to about 6 T due to the texture development. However, when Ha>6 T some disturbance in Jc appears; one is increased and the other is decreased. This may be due to the change of O2 atmosphere around the tapes during MMP, which comes from the change of O2 gas flowing by the magnetic field. The results suggest that a high magnetic field is very effective to enhance the texture development and to fabricate tapes with high critical current Ic.
AB - Vertical magnetic fields up to 9 T were applied to the magnetic melt-processing (MMP) of dip-coated and Ag-sheathed Bi2212 mono-core tapes with a core thickness of about 150 μm, which were set horizontally. SEM observation shows that a uniform high-degree of texture is formed throughout the thickness of the tapes by the magnetic field Ha during MMP, whereas a large portion of the area is non-textured without Ha. The critical current density Jc of the tapes increases with increasing Ha up to about 6 T due to the texture development. However, when Ha>6 T some disturbance in Jc appears; one is increased and the other is decreased. This may be due to the change of O2 atmosphere around the tapes during MMP, which comes from the change of O2 gas flowing by the magnetic field. The results suggest that a high magnetic field is very effective to enhance the texture development and to fabricate tapes with high critical current Ic.
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U2 - 10.1016/S0921-4534(02)01192-9
DO - 10.1016/S0921-4534(02)01192-9
M3 - Article
AN - SCOPUS:0037107861
SN - 0921-4534
VL - 382
SP - 33
EP - 37
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 1
ER -