Comparison Study of the Flux Pinning Enhancement of YBa 2 Cu 3 O 7−δ Thin Films With BaHfO 3 + Y 2 O 3 Single- and Mixed-Phase Additions
Comparison Study of the Flux Pinning Enhancement of YBa 2 Cu 3 O 7−δ Thin Films With BaHfO 3 + Y 2 O 3 Single- and Mixed-Phase Additions
复制标题
BaHfO 3 Y 2 O 3 单相和混合相添加对 YBa 2 Cu 3 O 7-δ 薄膜通量钉扎增强的比较研究
DOI：
10.1109/tasc.2019.2892324
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发表时间：
2019
影响因子：
1.8
通讯作者：
Haugan, Timothy J.
中科院分区：
文献类型：
--
作者：
Sebastian, Mary Ann;Gautam, Bibek;Ebbing, Charles R.;Panasyuk, George Y.;Susner, Michael A.;Huang, Jijie;Zhang, Wenrui;Wang, Haiyan;Wu, Judy Z.;Haugan, Timothy J.
将纳米级绝缘相结合到 YBa2Cu3O7-δ(YBCO) 超导薄膜中，通过结合不同的钉扎机制增强磁通钉扎，从而提高电流密度。本研究探讨了添加铪酸钡 (BHO) 和氧化钇 Y2O3 非反应相的影响。脉冲激光沉积 (PLD) 在 790 °C 至 840 °C 的各种沉积温度下在 SrTiO3(STO) 基底上生成薄膜。 PLD 目标组合物将 BHO 的体积百分比从 2 vol% 变化到 6 vol%，同时保持 3 vol% Y2O3 和剩余 vol% YBCO。通过 SEM、TEM 和 XRD 分析检查微观结构，可以深入了解添加 BHO 和 Y2O3 对 YBCO 薄膜的磁性和传输电流密度（使用平行于 c 和 ab 方向的外加场测量）以及薄膜的临界温度测量的影响。 Y2O3 的添加减少了 c 方向和 ab 方向之间电流密度的变化，这是在应用中需要考虑的一个重要方面，例如用于电机的 HTS 线。
Incorporating nano-scale insulating phases to YBa2Cu3O7-δ(YBCO) superconductor thin films enhances flux pinning by combining different pinning mechanisms, which in turn increases the current density. This research explores the effects of addition of the non-reactive phases of barium hafnate (BHO) and yttrium oxide Y2O3. Pulsed laser deposition (PLD) produces thin films on SrTiO3(STO) substrates at various deposition temperatures ranging from 790 °C to 840 °C. PLD target compositions vary the volume percent of BHO from 2 to 6 vol% while maintaining 3 vol% Y2O3and the remaining vol% YBCO. Examining the microstructure through SEM, TEM, and XRD analyses provides insight into the impact of the additions of BHO and Y2O3on the YBCO thin films' magnetic and transport current densities measured with an applied field parallel to the c and ab directions, and on the films' critical temperature measurements. The Y2O3additions decrease the variability in the current density between the c and ab directions, which is an important aspect to consider in applications, such as for HTS wires for motors.