Properties of YBa2Cu3O7−δ thick films on flexible buffered metallic substrates
Properties of YBa2Cu3O7−δ thick films on flexible buffered metallic substrates
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DOI：
10.1063/1.114559
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发表时间：
1995-10
影响因子：
4
通讯作者：
Xindi Wu;S. Foltyn;P. Arendt;W. Blumenthal;I. Campbell;J. Cotton;J. Coulter;W. Hults;M. Maley;H. Safar;J. Smith
中科院分区：
文献类型：
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作者：
Xindi Wu;S. Foltyn;P. Arendt;W. Blumenthal;I. Campbell;J. Cotton;J. Coulter;W. Hults;M. Maley;H. Safar;J. Smith
我们报道了在镍基合金上制备的YBa 2Cu 3 O 7 −δ（YBCO）厚膜的超导性能和力学性能，该厚膜具有织构化的氧化钇稳定的氧化锆（YSZ）缓冲层。分别采用脉冲激光沉积法和离子束辅助沉积法制备了YBCO和YSZ薄膜。结果发现，传输临界电流密度（Jc）的相关性非常好，与YBCO镶嵌蔓延。1 μm厚的YBCO薄膜在75 K时的Jc超过1× 106 A/cm 2，在4 K时的Jc超过1×107 A/cm 2。在2 μm厚、1 cm宽的YBCO薄膜中获得了75 K时120 A的零场临界电流。角度依赖性测量揭示了H α c和H α a-B的Jc峰。H_（？）c的峰值意味着由于诸如小角度晶界或孪晶界的缺陷而导致的额外钉扎。在75 K下的弯曲试验表明，金属衬底上的YBCO厚膜可以承受拉伸和压缩的应变分别为0.4%和1%以上。
We report superconducting and mechanical properties of YBa2Cu3O7−δ (YBCO) thick films on Ni‐based alloys with a textured yttria‐stabilized zirconia (YSZ) buffer layer. The YBCO and YSZ layers were deposited by pulsed laser deposition and ion beam assisted deposition, respectively. It was found that the transport critical current density (Jc) correlates very well with the YBCO mosaic spread. Jc over 1×10 6 A/cm2 at 75 K and ∼1×107 A/cm2 at 4 K were obtained in the 1‐μm thick YBCO films. Zero field critical current of 120 amps at 75 K was obtained in a 2‐μm‐thick and 1‐cm‐wide YBCO film. Angular dependence measurement revealed Jc peaks for both H∥c and H∥a‐b. The peak for H∥c implies additional pinning due to defects such as small angle grain boundaries or twin boundaries. Bending tests at 75 K showed that the YBCO thick films on the metallic substrates could sustain a strain of 0.4% and over 1% for tension and compression, respectively.