Effect of nano-sized Sm2BaCuO5 particles addition on the pinning mechanism of Sm-Ba-Cu-O materials

Shih Yun Chen, Ping Chi Hseih, In-Gann Chen, Mow Kuen Wu

研究成果: Article

15 引文 (Scopus)

摘要

The superconducting properties of air-processed melt-textured growth Sm-Ba-Cu-O samples with addition of small amounts (0.004 wt%, 0.4 wt%, 4 wt%) of nano-sized Sm2BaCuO5 particles (nm211) were studied. The microstructure observations show that the size distribution and morphology of the 211-particles of the nm211-doped samples are similar to that of the control (undoped) samples. However, except for the 4 wt% nm211-doped sample, both Tc (critical temperature) and Jc (H, T) (critical current density) are enhanced in nm211-doped samples, and the Jc-H curves are different from those of control samples. The effect of nm211 particles on Jc enhancement is larger at high magnetic fields (>1 T at 77 K) than at low magnetic fields (0∼1 T). The dominant pinning mechanism by analyzing the Jc (H, T) data using the scaling theory indicate that the nm211-doped samples are originated from Δκ pinning (i.e., Tc variation); on the other hand, the control samples are originated from normal pinning (i.e., nonsuperconducting crystalline defects). It is proposed that nano-sized compositional fluctuations in the RE1+ x Ba2- x Cu3O y matrix, which are products of nm211 particles and liquid peritectic reaction, act as the source of Δκ pinning centers.

原文English
頁(從 - 到)843-850
頁數8
期刊Journal of Materials Research
19
發行號3
DOIs
出版狀態Published - 2004 一月 1

指紋

Magnetic fields
Crystalline materials
Defects
Microstructure
Liquids
Air
magnetic fields
critical current
critical temperature
Temperature
current density
scaling
microstructure
augmentation
air
defects
curves
products
matrices
liquids

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

引用此文

Chen, Shih Yun ; Hseih, Ping Chi ; Chen, In-Gann ; Wu, Mow Kuen. / Effect of nano-sized Sm2BaCuO5 particles addition on the pinning mechanism of Sm-Ba-Cu-O materials. 於: Journal of Materials Research. 2004 ; 卷 19, 編號 3. 頁 843-850.
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abstract = "The superconducting properties of air-processed melt-textured growth Sm-Ba-Cu-O samples with addition of small amounts (0.004 wt{\%}, 0.4 wt{\%}, 4 wt{\%}) of nano-sized Sm2BaCuO5 particles (nm211) were studied. The microstructure observations show that the size distribution and morphology of the 211-particles of the nm211-doped samples are similar to that of the control (undoped) samples. However, except for the 4 wt{\%} nm211-doped sample, both Tc (critical temperature) and Jc (H, T) (critical current density) are enhanced in nm211-doped samples, and the Jc-H curves are different from those of control samples. The effect of nm211 particles on Jc enhancement is larger at high magnetic fields (>1 T at 77 K) than at low magnetic fields (0∼1 T). The dominant pinning mechanism by analyzing the Jc (H, T) data using the scaling theory indicate that the nm211-doped samples are originated from Δκ pinning (i.e., Tc variation); on the other hand, the control samples are originated from normal pinning (i.e., nonsuperconducting crystalline defects). It is proposed that nano-sized compositional fluctuations in the RE1+ x Ba2- x Cu3O y matrix, which are products of nm211 particles and liquid peritectic reaction, act as the source of Δκ pinning centers.",
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Effect of nano-sized Sm2BaCuO5 particles addition on the pinning mechanism of Sm-Ba-Cu-O materials. / Chen, Shih Yun; Hseih, Ping Chi; Chen, In-Gann; Wu, Mow Kuen.

於: Journal of Materials Research, 卷 19, 編號 3, 01.01.2004, p. 843-850.

研究成果: Article

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N2 - The superconducting properties of air-processed melt-textured growth Sm-Ba-Cu-O samples with addition of small amounts (0.004 wt%, 0.4 wt%, 4 wt%) of nano-sized Sm2BaCuO5 particles (nm211) were studied. The microstructure observations show that the size distribution and morphology of the 211-particles of the nm211-doped samples are similar to that of the control (undoped) samples. However, except for the 4 wt% nm211-doped sample, both Tc (critical temperature) and Jc (H, T) (critical current density) are enhanced in nm211-doped samples, and the Jc-H curves are different from those of control samples. The effect of nm211 particles on Jc enhancement is larger at high magnetic fields (>1 T at 77 K) than at low magnetic fields (0∼1 T). The dominant pinning mechanism by analyzing the Jc (H, T) data using the scaling theory indicate that the nm211-doped samples are originated from Δκ pinning (i.e., Tc variation); on the other hand, the control samples are originated from normal pinning (i.e., nonsuperconducting crystalline defects). It is proposed that nano-sized compositional fluctuations in the RE1+ x Ba2- x Cu3O y matrix, which are products of nm211 particles and liquid peritectic reaction, act as the source of Δκ pinning centers.

AB - The superconducting properties of air-processed melt-textured growth Sm-Ba-Cu-O samples with addition of small amounts (0.004 wt%, 0.4 wt%, 4 wt%) of nano-sized Sm2BaCuO5 particles (nm211) were studied. The microstructure observations show that the size distribution and morphology of the 211-particles of the nm211-doped samples are similar to that of the control (undoped) samples. However, except for the 4 wt% nm211-doped sample, both Tc (critical temperature) and Jc (H, T) (critical current density) are enhanced in nm211-doped samples, and the Jc-H curves are different from those of control samples. The effect of nm211 particles on Jc enhancement is larger at high magnetic fields (>1 T at 77 K) than at low magnetic fields (0∼1 T). The dominant pinning mechanism by analyzing the Jc (H, T) data using the scaling theory indicate that the nm211-doped samples are originated from Δκ pinning (i.e., Tc variation); on the other hand, the control samples are originated from normal pinning (i.e., nonsuperconducting crystalline defects). It is proposed that nano-sized compositional fluctuations in the RE1+ x Ba2- x Cu3O y matrix, which are products of nm211 particles and liquid peritectic reaction, act as the source of Δκ pinning centers.

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