Development of Long Coated Conductors with High In-field Ic Performance by PLD Method at High Production Rate

Publication date: 2016 Source:Physics Procedia, Volume 81 Author(s): Akira Ibi, Tomo Yoshida, Teruo Izumi, Yuh Shiohara, Daisaku Yokoe, Takeharu Kato, Tsukasa Hirayama We fabricated short samples and a 93 m long coated conductor (C. C.) of EuBa2Cu3O7-δ (EuBCO) with BaHfO3 (BHO) by the IBAD and the PLD methods, which exhibited the high in-field minimum I c value, (I c(min)), performance of 141.2 (77K in 3 T) and 411.3 (65K in 3 T) A/cm-w for a short sample, and 133.9 (77K in 3 T) A/cm-w for 93 m long C. C. with 3.6μm in thickness, respectively. Moreover, this long EuBCO with BHO coated conductor also showed high uniform longitudinal I c distributions and n-value in magnetic fields. However, the deposition rate for obtaining the high in-field I c performance was comparatively slow down to 10μm/h. To realize the low production cost for EuBCO with BHO coated conductors, improvement of the deposition rate of the EuBCO with BHO layer with high I c is required. To solve this problem, we optimized growth conditions including deposition conditions. One of the objectives of this work was changing the layer growth mode from the vapor-solid (VS) mode to the vapor-liquid-solid (VLS) one to fabricate EuBCO with BHO layers for achievement of high production rate and maintaining the high in-field I c and J c performance of the films deposited at slow deposition rates. As a result, we fabricated EuBCO with BHO coated conductors at a high deposition rate of about 40μm/h a...

Source: Physics Procedia - May 9, 2016 Category: Physics Source Type: research