TY - JOUR
T1 - The modulation of the peak effect in melt-processed (Sm-Eu)123 superconductors with compositional fluctuations
AU - Hu, A.
AU - Zhou, H.
AU - Huang, D. X.
AU - Chikumoto, N.
AU - Sakai, N.
AU - Murakami, M.
N1 - Funding Information:
Manuscript received August 5, 2002. This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Super-condcutivity Applications. The work of A. Hu was supported by NEDO.
PY - 2003/6
Y1 - 2003/6
N2 - The peak effect in magnetization loops of melt-processed (SmxEu1-x)Ba2Cu3O7-δ superconductors is manipulated by varying the Sm/Eu ratio in the initial composition. In all the samples the peak field BP(T), at which the magnetization moment reaches the maximum, was linearly temperature dependent. The fitting to such a relationship unveils a slightly lower critical temperature Tcp than the bulk Tc at zero field. A kink appears in the reversible magnetization moment of the field dependence of superconducting transition. This kink temperature Tck(B) is also a linear function of applied field. Transmission electron microscopy (TEM) observation confirms the presence of nano-scale regular compositional modulation arising from local RE-Ba substitution, which is weakened with increasing Eu concentration. The peak effect is thus attributed to the scattering of local Tc due to compositional fluctuation.
AB - The peak effect in magnetization loops of melt-processed (SmxEu1-x)Ba2Cu3O7-δ superconductors is manipulated by varying the Sm/Eu ratio in the initial composition. In all the samples the peak field BP(T), at which the magnetization moment reaches the maximum, was linearly temperature dependent. The fitting to such a relationship unveils a slightly lower critical temperature Tcp than the bulk Tc at zero field. A kink appears in the reversible magnetization moment of the field dependence of superconducting transition. This kink temperature Tck(B) is also a linear function of applied field. Transmission electron microscopy (TEM) observation confirms the presence of nano-scale regular compositional modulation arising from local RE-Ba substitution, which is weakened with increasing Eu concentration. The peak effect is thus attributed to the scattering of local Tc due to compositional fluctuation.
KW - (Sm-Eu)123
KW - Compositional fluctuation
KW - Melt-processed material
KW - Peak effect
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U2 - 10.1109/TASC.2003.812540
DO - 10.1109/TASC.2003.812540
M3 - Conference article
AN - SCOPUS:0042466327
SN - 1051-8223
VL - 13
SP - 3755
EP - 3758
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2 III
T2 - 2002 Applied Superconductivity Conference
Y2 - 4 August 2002 through 9 August 2002
ER -