Abstract
Using magnetic measurements we have investigated the effect of twin boundaries on flux pinning over the temperature range of 4.2 to 85 K in YBaCuO superconductors prepared by the melt-powder-melt-growth process (MPMG). It has been found that non-superconducting Y2BaCuO5 (211) particles dispersed in the 123 matrix can work as strong pinning centers, resulting in higher Jc values. Despite non-superconducting 211 particles being the main pinning centers, defects such as twin boundaries, oxygen deficiency and stacking faults are also considered to be possible pinning centers in melt-processed YBCO. An enhancement of Jc was observed when the magnetic field was applied parallel to the twin planes. The results indicate that twin planes contribute to flux pinning, but that their effect is not very large in MPMG processed samples.
| Original language | English |
|---|---|
| Pages (from-to) | 393-403 |
| Number of pages | 11 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 211 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - 1993 Jun 20 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
The effect of twin boundaries on the flux pinning in MPMG processed YBCO. / Fujimoto, Hiroyuki; Taguchi, Takahiro; Murakami, Masato; Koshizuka, Naoki.
In: Physica C: Superconductivity and its Applications, Vol. 211, No. 3-4, 20.06.1993, p. 393-403.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The effect of twin boundaries on the flux pinning in MPMG processed YBCO
AU - Fujimoto, Hiroyuki
AU - Taguchi, Takahiro
AU - Murakami, Masato
AU - Koshizuka, Naoki
PY - 1993/6/20
Y1 - 1993/6/20
N2 - Using magnetic measurements we have investigated the effect of twin boundaries on flux pinning over the temperature range of 4.2 to 85 K in YBaCuO superconductors prepared by the melt-powder-melt-growth process (MPMG). It has been found that non-superconducting Y2BaCuO5 (211) particles dispersed in the 123 matrix can work as strong pinning centers, resulting in higher Jc values. Despite non-superconducting 211 particles being the main pinning centers, defects such as twin boundaries, oxygen deficiency and stacking faults are also considered to be possible pinning centers in melt-processed YBCO. An enhancement of Jc was observed when the magnetic field was applied parallel to the twin planes. The results indicate that twin planes contribute to flux pinning, but that their effect is not very large in MPMG processed samples.
AB - Using magnetic measurements we have investigated the effect of twin boundaries on flux pinning over the temperature range of 4.2 to 85 K in YBaCuO superconductors prepared by the melt-powder-melt-growth process (MPMG). It has been found that non-superconducting Y2BaCuO5 (211) particles dispersed in the 123 matrix can work as strong pinning centers, resulting in higher Jc values. Despite non-superconducting 211 particles being the main pinning centers, defects such as twin boundaries, oxygen deficiency and stacking faults are also considered to be possible pinning centers in melt-processed YBCO. An enhancement of Jc was observed when the magnetic field was applied parallel to the twin planes. The results indicate that twin planes contribute to flux pinning, but that their effect is not very large in MPMG processed samples.
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UR - http://www.scopus.com/inward/citedby.url?scp=0027610205&partnerID=8YFLogxK
U2 - 10.1016/0921-4534(93)90146-H
DO - 10.1016/0921-4534(93)90146-H
M3 - Article
AN - SCOPUS:0027610205
VL - 211
SP - 393
EP - 403
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 3-4
ER -