TY - JOUR
T1 - Improvement of the microstructure of melt-processed Sm-based superconductors
AU - Tazoe, K.
AU - Ikuta, H.
AU - Yoshikawa, M.
AU - Yanagi, Y.
AU - Itoh, Y.
AU - Oka, T.
AU - Mizutani, U.
N1 - Funding Information:
The work in Nagoya University was partially supported by a Grant-in-Aid from the Ministry of Education, Science, and Culture and by The Iwatani Naoji Foundation's Research Grant.
PY - 2001
Y1 - 2001
N2 - We report on the effect of the atmosphere during the decomposition of the precursors of Sm-Ba-Cu-O bulk superconductors. It was found that the formation of voids was greatly suppressed by two methods, melting in an oxygen gas atmosphere or in vacuum. For both methods, the atmosphere during crystallization was switched to an Ar gas flowing one. The samples prepared by these methods exhibited high superconducting transition temperatures with sharp transition widths. However, the zero-field critical current density was lower than that of the reference sample, which was prepared by decomposing the precursor in an Ar gas flowing atmosphere.
AB - We report on the effect of the atmosphere during the decomposition of the precursors of Sm-Ba-Cu-O bulk superconductors. It was found that the formation of voids was greatly suppressed by two methods, melting in an oxygen gas atmosphere or in vacuum. For both methods, the atmosphere during crystallization was switched to an Ar gas flowing one. The samples prepared by these methods exhibited high superconducting transition temperatures with sharp transition widths. However, the zero-field critical current density was lower than that of the reference sample, which was prepared by decomposing the precursor in an Ar gas flowing atmosphere.
KW - Melt-growth
KW - Microstructure
KW - Sm-Ba-Cu-O
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U2 - 10.1016/S0921-4534(01)00370-7
DO - 10.1016/S0921-4534(01)00370-7
M3 - Article
AN - SCOPUS:0035423351
SN - 0921-4534
VL - 357-360
SP - 807
EP - 810
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
ER -