TY - JOUR
T1 - Superconducting properties of (Nd, Sm, Eu, Gd)-Ba-Cu-O
AU - Muralidhar, M.
AU - Saitoh, T.
AU - Segawa, K.
AU - Murakami, M.
N1 - Funding Information:
This work was partially supported by NEDO for the Research and Development of Industrial Science and Technology Frontier Program. One of the authors (MM) thanks the Japanese Science and Technology Agency (STA) for providing the fellowship.
PY - 1998
Y1 - 1998
N2 - We have investigated the superconducting properties of (Nd, Sm, Eu, Gd)-Ba-Cu-O composites prepared by the oxygen-controlled-melt-growth (OCMG) process. X-ray diffraction analyses confirmed that the main phase is REBa2Cu3Oy (RE is rare earth elements) with a small amount of the second phase RE2BaCuO5. Compositional analyses revealed that four RE elements were distributed uniformly with their ratio almost identical to the nominal composition. The samples showed relatively high Tc values of 93.5-95 K with a sharp superconducting transition. A clear secondary peak effect was observed in the magnetization curves. High resolution transmission electron microscopic observation, however revealed that unlike RE-Ba-Cu-O compounds, in which the RE site was compounded with two or three RE elements, clear strain fields were observed in the matrix, showing that the crystal defects were introduced by mixing four RE elements.
AB - We have investigated the superconducting properties of (Nd, Sm, Eu, Gd)-Ba-Cu-O composites prepared by the oxygen-controlled-melt-growth (OCMG) process. X-ray diffraction analyses confirmed that the main phase is REBa2Cu3Oy (RE is rare earth elements) with a small amount of the second phase RE2BaCuO5. Compositional analyses revealed that four RE elements were distributed uniformly with their ratio almost identical to the nominal composition. The samples showed relatively high Tc values of 93.5-95 K with a sharp superconducting transition. A clear secondary peak effect was observed in the magnetization curves. High resolution transmission electron microscopic observation, however revealed that unlike RE-Ba-Cu-O compounds, in which the RE site was compounded with two or three RE elements, clear strain fields were observed in the matrix, showing that the crystal defects were introduced by mixing four RE elements.
UR - http://www.scopus.com/inward/record.url?scp=0031988426&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031988426&partnerID=8YFLogxK
U2 - 10.1016/S0964-1807(98)00094-5
DO - 10.1016/S0964-1807(98)00094-5
M3 - Article
AN - SCOPUS:0031988426
SN - 0964-1807
VL - 6
SP - 139
EP - 147
JO - Applied Superconductivity
JF - Applied Superconductivity
IS - 2-5
ER -