TY - JOUR
T1 - Synthesis of Ca-doped Y124 Superconductor by Polymerized Complex Method Followed by O2-HIP Technique and Discussion of Ca-site Selectivity in the Crystal Structure.
AU - Kakihana, Masato
AU - Nishio, Shigeru
AU - Yashima, Masatomo
AU - Mazaki, Hiromasa
AU - Yasuoka, Hiroshi
AU - Yoshimura, Masahiro
AU - Berastegui, Pedro
PY - 1994/2/1
Y1 - 1994/2/1
N2 - We report Ca-site selectivity in the crystal structure of Y124(YBazCu4O8) superconductor. We sucsessfiilly synthesized superconducting samples with nominal compositions of (Y1-xCax)Ba2Cu6O8 (series-A: x=0.0, 0.05, 0.1) and Y(Ba2-yCay)Cu4O8) (series-B: y=0.0, 0.05, 0.1) by polymerized complex method followed by O2-IIIP technique. Neutron powder diffraction measurement has shown excess impurities in propotion to Ca-content in series-B. An extension of A Tc(10-90%) was also observed in series-B by AC-magnetic susceptibility measurement It is suggested that the formation of these impurities in series-B originate from a discrepancy in idea] composion, that is, (Y1-xCax)Ba2Cu4O8 (seires-A). We conclude that Ca-atom preferentially substitutes Y-atom in the 124 structure for these reasons.
AB - We report Ca-site selectivity in the crystal structure of Y124(YBazCu4O8) superconductor. We sucsessfiilly synthesized superconducting samples with nominal compositions of (Y1-xCax)Ba2Cu6O8 (series-A: x=0.0, 0.05, 0.1) and Y(Ba2-yCay)Cu4O8) (series-B: y=0.0, 0.05, 0.1) by polymerized complex method followed by O2-IIIP technique. Neutron powder diffraction measurement has shown excess impurities in propotion to Ca-content in series-B. An extension of A Tc(10-90%) was also observed in series-B by AC-magnetic susceptibility measurement It is suggested that the formation of these impurities in series-B originate from a discrepancy in idea] composion, that is, (Y1-xCax)Ba2Cu4O8 (seires-A). We conclude that Ca-atom preferentially substitutes Y-atom in the 124 structure for these reasons.
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U2 - 10.2497/jjspm.41.361
DO - 10.2497/jjspm.41.361
M3 - Article
AN - SCOPUS:0028421354
VL - 41
SP - 361
EP - 364
JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
SN - 0532-8799
IS - 4
ER -