TY - JOUR
T1 - Pinning mechanism of the high critical current density Sm-Ba-Cu-O superconductors with Sm210/Pd/Pt/CeO2 addition
AU - Chen, Shih Yun
AU - Chen, In Gann
AU - Wu, Mow Kuen
N1 - Funding Information:
Manuscript received August 6, 2002. This work was supported by the National Science Council, Republic of China, Taiwan, under Contract NSC-91-MOE-S-006-001-X. S.-Y. Chen and I.-G. Chen are with the Department of Materials Science and Engineering, National Cheng-Kung University, Tainan, Taiwan, R.O.C. (e-mail: ingann@mail.ncku.edu.tw). M.-K. Wu is with the Institute of Physics, Academia Sinica, Taipei, Taiwan, R.O.C. Digital Object Identifier 10.1109/TASC.2003.812110
PY - 2003/7/1
Y1 - 2003/7/1
N2 - The superconducting properties and the pinning mechanisms of air-processed melt-textured grown Sm-Ba-Cu-O samples with the addition of small amounts of Pd (0.5wt%), Pt (0.5wt%) and CeO2 (1.0wt%) were studied. The superconducting properties were enhanced by these additions, especially in co-doped samples. With co-doping of Pd/Pt or Pd/CeO2, the samples exhibited a high Tc (∼91 K) and a high Jc (0 T, 77 K) ∼ 104 A/cm2. Pinning forces vs magnetic field studies indicated that these samples have different pinning mechanisms from the un-doped sample. Observations of the microstructures showed that the Pt or CeO2 addition reduced the sizes of the 211-particles significantly. EPMA results showed that the chemical distributions of these additions are different. Furthermore, TEM/EDS investigations found that the compositional fluctuation of the matrix in the sample co-doped with Pd/Pt is larger than in the sample co-doped with Pd/CeO2.
AB - The superconducting properties and the pinning mechanisms of air-processed melt-textured grown Sm-Ba-Cu-O samples with the addition of small amounts of Pd (0.5wt%), Pt (0.5wt%) and CeO2 (1.0wt%) were studied. The superconducting properties were enhanced by these additions, especially in co-doped samples. With co-doping of Pd/Pt or Pd/CeO2, the samples exhibited a high Tc (∼91 K) and a high Jc (0 T, 77 K) ∼ 104 A/cm2. Pinning forces vs magnetic field studies indicated that these samples have different pinning mechanisms from the un-doped sample. Observations of the microstructures showed that the Pt or CeO2 addition reduced the sizes of the 211-particles significantly. EPMA results showed that the chemical distributions of these additions are different. Furthermore, TEM/EDS investigations found that the compositional fluctuation of the matrix in the sample co-doped with Pd/Pt is larger than in the sample co-doped with Pd/CeO2.
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U2 - 10.1109/TASC.2003.812110
DO - 10.1109/TASC.2003.812110
M3 - Conference article
AN - SCOPUS:0041965935
VL - 13
SP - 3087
EP - 3090
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 2
T2 - 2002 Applied Superconductivity Conference
Y2 - 4 August 2002 through 9 August 2002
ER -