通过无氟高分子辅助金属有机物沉积法(PA-MOD)制备了YBCO超导薄膜,研究了785 ～845℃的不同短时高温热处理对YBCO薄膜双轴织构、表面形貌及超导性能的影响.X射线衍射(XRD)和扫描电镜(SEM)的结果表明,经800℃短时高温处理的YBCO薄膜具有良好的双轴织构和平整致密的表面形貌,物性测量(QuantumDesign SQUID)的结果表明,该薄膜超导转变温度达到90K,77K自场下的临界电流密度(J_c)为2MA/cm~2.
YBCO superconducting films have been prepared via polymer-assisted metal organic deposition (MOD).The infleuance of a short-term high temperature treatment at 785 ～ 845 ℃ on their biaxial texture, surface morphology and superconducting properties have been investigated. Through X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis, it's demonstrated that that good biaxial texture as well as smooth and dense surface in the YBCO film was prepared under a short-term high temperature treatment at 800℃. Analyzed by a physical properties measurement system (Quantum-Design SQUID), this film has been achieved a critical superconductive transtion temperature T_c of 90 K, and a critical current density J_c of 2 MA/cm~2 at 77 K and self-field.
参考文献
| [1] | Q. X. Jia;T. M. Mccleskey;A. K. Burrell;Y. Lin;G. E. Collis;H. Wang;A. D. Q. Li;S. R. Foltyn .Polymer-assisted deposition of metal-oxide films[J].Nature materials,2004(8):529-532. |
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