TY - JOUR
T1 - Solubility limit and crystallization of (Sm0.5Eu0.5)1+xBa2-xCu3O 7-δ
AU - Hu, A.
AU - Sakai, N.
AU - Murakami, M.
N1 - Funding Information:
This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications. One of author (AH) would like to thank N. Chikomoto, M. Matsui, K. Inoue, K. Ogasawara, and S. Nariki for experimental help, also acknowledges the NEDO for providing a fellowship.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2002/6/1
Y1 - 2002/6/1
N2 - The phase relation and crystallization behavior were investigated in a series of (Sm0.5Eu0.5)1+xBa2-xCu3O 7-δ (-0.1 ≤ x ≤ 0.3). The single phase rare earth (RE)-Ba substitution window (RE: Sm and Eu) was found to range from 0 to 0.3 when quenched from 1010 °C for nominal substitution parameter, x ≤ 0.05, from 990 °C for x = 0.1 and 0.2, and from 970 °C for x = 0.3 under ambient atmosphere. Onset Tc values were 94 K for x ≤ 0 and fell sharply with increasing x. After Ar post-annealing (ArPA), the countersubstitution of RE by Ba was observed associated with a slight improvement of onset Tc (0.5 K). A dramatic enhancement of onset Tc for the sample with RE rich composition (x > 0) was observed with ArPA. It was also found that crystallization rate was large for the compositions with x ≤ 0 while small for x > 0.
AB - The phase relation and crystallization behavior were investigated in a series of (Sm0.5Eu0.5)1+xBa2-xCu3O 7-δ (-0.1 ≤ x ≤ 0.3). The single phase rare earth (RE)-Ba substitution window (RE: Sm and Eu) was found to range from 0 to 0.3 when quenched from 1010 °C for nominal substitution parameter, x ≤ 0.05, from 990 °C for x = 0.1 and 0.2, and from 970 °C for x = 0.3 under ambient atmosphere. Onset Tc values were 94 K for x ≤ 0 and fell sharply with increasing x. After Ar post-annealing (ArPA), the countersubstitution of RE by Ba was observed associated with a slight improvement of onset Tc (0.5 K). A dramatic enhancement of onset Tc for the sample with RE rich composition (x > 0) was observed with ArPA. It was also found that crystallization rate was large for the compositions with x ≤ 0 while small for x > 0.
KW - Ar post-annealing
KW - Crystallization
KW - Solid solubility limit
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U2 - 10.1016/S0921-4534(01)01063-2
DO - 10.1016/S0921-4534(01)01063-2
M3 - Article
AN - SCOPUS:0036603903
SN - 0921-4534
VL - 371
SP - 19
EP - 26
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 1
ER -