Abstract
The TFA-MOD process was applied to fabricate YBCO films on PLD - CeO 2/IBAD - Gd2Zr2O7/Hastelloy substrates. In order to obtain higher Ic performance, thicker films maintaining high Jc values are required. Jc depends strongly on the YBCO crystal alignment. Dependences of Jc on Δφ of the CeO2 substrates has been investigated. It was found that the J c value increased with improvement of the crystal alignment of the CeO2 buffer layers. Also, the Jc value depended strongly on the PH2O during the crystallization. The pore size in the film was smaller in the high Jc films fabricated under medium PH2O and becomes larger in the low-Jc films under low and high P H2O. Furthermore, crack formation was observed in thick films crystallized at high PH2O. The large pore causes local reduction of current paths and additionally introduces the concentration of electric fields. It was found that both the porosity and crack formations limit the Jc properties. Finally, a YBCO film with 2.05 μm in thickness was fabricated on a CeO2/Gd2Zr2O7 layer buffered Hastelloy substrate with Δφ ∼ 4°. A Jc value of 2.02 MA/cm2 and transport Ic value of 413 A at 77 K, self-field were obtained.
| Original language | English |
|---|---|
| Pages (from-to) | 2663-2666 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 15 |
| Issue number | 2 PART III |
| DOIs | |
| Publication status | Published - Jun 1 2005 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
High-Jc thick YBCO coated conductors by TEA-MOD process. / Teranishi, Ryo; Matsuda, Junko; Nakaoka, Koichi; Fuji, Hiroshi; Aoki, Yuji; Kitoh, Yutaka; Izumi, Teruo; Yamada, Yutaka; Shiohara, Yuh.
In: IEEE Transactions on Applied Superconductivity, Vol. 15, No. 2 PART III, 01.06.2005, p. 2663-2666.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - High-Jc thick YBCO coated conductors by TEA-MOD process
AU - Teranishi, Ryo
AU - Matsuda, Junko
AU - Nakaoka, Koichi
AU - Fuji, Hiroshi
AU - Aoki, Yuji
AU - Kitoh, Yutaka
AU - Izumi, Teruo
AU - Yamada, Yutaka
AU - Shiohara, Yuh
PY - 2005/6/1
Y1 - 2005/6/1
N2 - The TFA-MOD process was applied to fabricate YBCO films on PLD - CeO 2/IBAD - Gd2Zr2O7/Hastelloy substrates. In order to obtain higher Ic performance, thicker films maintaining high Jc values are required. Jc depends strongly on the YBCO crystal alignment. Dependences of Jc on Δφ of the CeO2 substrates has been investigated. It was found that the J c value increased with improvement of the crystal alignment of the CeO2 buffer layers. Also, the Jc value depended strongly on the PH2O during the crystallization. The pore size in the film was smaller in the high Jc films fabricated under medium PH2O and becomes larger in the low-Jc films under low and high P H2O. Furthermore, crack formation was observed in thick films crystallized at high PH2O. The large pore causes local reduction of current paths and additionally introduces the concentration of electric fields. It was found that both the porosity and crack formations limit the Jc properties. Finally, a YBCO film with 2.05 μm in thickness was fabricated on a CeO2/Gd2Zr2O7 layer buffered Hastelloy substrate with Δφ ∼ 4°. A Jc value of 2.02 MA/cm2 and transport Ic value of 413 A at 77 K, self-field were obtained.
AB - The TFA-MOD process was applied to fabricate YBCO films on PLD - CeO 2/IBAD - Gd2Zr2O7/Hastelloy substrates. In order to obtain higher Ic performance, thicker films maintaining high Jc values are required. Jc depends strongly on the YBCO crystal alignment. Dependences of Jc on Δφ of the CeO2 substrates has been investigated. It was found that the J c value increased with improvement of the crystal alignment of the CeO2 buffer layers. Also, the Jc value depended strongly on the PH2O during the crystallization. The pore size in the film was smaller in the high Jc films fabricated under medium PH2O and becomes larger in the low-Jc films under low and high P H2O. Furthermore, crack formation was observed in thick films crystallized at high PH2O. The large pore causes local reduction of current paths and additionally introduces the concentration of electric fields. It was found that both the porosity and crack formations limit the Jc properties. Finally, a YBCO film with 2.05 μm in thickness was fabricated on a CeO2/Gd2Zr2O7 layer buffered Hastelloy substrate with Δφ ∼ 4°. A Jc value of 2.02 MA/cm2 and transport Ic value of 413 A at 77 K, self-field were obtained.
UR - http://www.scopus.com/inward/record.url?scp=22144451811&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=22144451811&partnerID=8YFLogxK
U2 - 10.1109/TASC.2005.847765
DO - 10.1109/TASC.2005.847765
M3 - Article
AN - SCOPUS:22144451811
VL - 15
SP - 2663
EP - 2666
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 2 PART III
ER -