Abstract
REBa2Cu3Oy (REBCO, RE = rare earth) coated conductors are required for high current carrying capability. Self-organization of Ba-M-O (BMO, M = Zr, Sn, Hf...) is available to improve critical current density (Jc) in magnetic field, and suppression of a-axis grain growth contributes to enhance Jc. The former and latter are affected by the surface diffusion of adatoms and supersaturation in the REBCO film growth, respectively. We focused on surface morphologies of SmBa2Cu3Oy (SmBCO) films deposited by the pulsed laser deposition method in this paper, and estimated surface diffusion constant and supersaturation from the surface morphologies. As a result, an activation energy of the surface diffusion was approximately 2.2 eV and the value is somewhat smaller than 2.5 eV for YBCO films. Additionally, we found that a-axis grains appeared when supersaturation (Δμ) became higher than a threshold Δμ. Interestingly, a seed layer consisting of c-axis oriented SmBCO suppressed a -axis grain growth. These findings are useful to improve Jc in REBCO coated conductors.
| Original language | English |
|---|---|
| Article number | 7500304 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 28 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Jun 1 2018 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
Surface Diffusion Constants and Supersaturations in SmBCO Films Prepared by Pulsed Laser Deposition Method. / Ichino, Yutaka; Shimazaki, Naoto; Miura, Shun; Tsuchiya, Yuji; Yoshida, Yutaka.
In: IEEE Transactions on Applied Superconductivity, Vol. 28, No. 4, 7500304, 01.06.2018.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Surface Diffusion Constants and Supersaturations in SmBCO Films Prepared by Pulsed Laser Deposition Method
AU - Ichino, Yutaka
AU - Shimazaki, Naoto
AU - Miura, Shun
AU - Tsuchiya, Yuji
AU - Yoshida, Yutaka
PY - 2018/6/1
Y1 - 2018/6/1
N2 - REBa2Cu3Oy (REBCO, RE = rare earth) coated conductors are required for high current carrying capability. Self-organization of Ba-M-O (BMO, M = Zr, Sn, Hf...) is available to improve critical current density (Jc) in magnetic field, and suppression of a-axis grain growth contributes to enhance Jc. The former and latter are affected by the surface diffusion of adatoms and supersaturation in the REBCO film growth, respectively. We focused on surface morphologies of SmBa2Cu3Oy (SmBCO) films deposited by the pulsed laser deposition method in this paper, and estimated surface diffusion constant and supersaturation from the surface morphologies. As a result, an activation energy of the surface diffusion was approximately 2.2 eV and the value is somewhat smaller than 2.5 eV for YBCO films. Additionally, we found that a-axis grains appeared when supersaturation (Δμ) became higher than a threshold Δμ. Interestingly, a seed layer consisting of c-axis oriented SmBCO suppressed a -axis grain growth. These findings are useful to improve Jc in REBCO coated conductors.
AB - REBa2Cu3Oy (REBCO, RE = rare earth) coated conductors are required for high current carrying capability. Self-organization of Ba-M-O (BMO, M = Zr, Sn, Hf...) is available to improve critical current density (Jc) in magnetic field, and suppression of a-axis grain growth contributes to enhance Jc. The former and latter are affected by the surface diffusion of adatoms and supersaturation in the REBCO film growth, respectively. We focused on surface morphologies of SmBa2Cu3Oy (SmBCO) films deposited by the pulsed laser deposition method in this paper, and estimated surface diffusion constant and supersaturation from the surface morphologies. As a result, an activation energy of the surface diffusion was approximately 2.2 eV and the value is somewhat smaller than 2.5 eV for YBCO films. Additionally, we found that a-axis grains appeared when supersaturation (Δμ) became higher than a threshold Δμ. Interestingly, a seed layer consisting of c-axis oriented SmBCO suppressed a -axis grain growth. These findings are useful to improve Jc in REBCO coated conductors.
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U2 - 10.1109/TASC.2018.2800078
DO - 10.1109/TASC.2018.2800078
M3 - Article
VL - 28
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 4
M1 - 7500304
ER -