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银掺杂对在不同模板上通过脉冲激光沉积法生长的YBCO薄膜超导和结构性能的影响。

Effect of Silver Doping on the Superconducting and Structural Properties of YBCO Films Grown by PLD on Different Templates.

作者信息

Shipulin Ilya A, Anna Thomas Aleena, Holleis Sigrid, Eisterer Michael, Nielsch Kornelius, Hühne Ruben

机构信息

Institute for Metallic Materials, Leibniz-IFW Dresden, 01069 Dresden, Germany.

School of Science, TU Dresden, 01062 Dresden, Germany.

出版信息

Materials (Basel). 2022 Aug 3;15(15):5354. doi: 10.3390/ma15155354.

DOI:10.3390/ma15155354
PMID:35955286
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9369561/
Abstract

We report the local structural and superconducting properties of undoped and Ag-doped YBaCuO (YBCO) films with a thickness of up to 1 µm prepared by pulsed laser deposition on SrTiO (STO) single crystals and on ion-beam-assisted deposition (IBAD) and rolling-assisted biaxially textured substrate (RABiTS)-based metal templates. X-ray diffraction demonstrates the high crystalline quality of the films on both single crystalline substrates and metal-based templates, respectively. Although there was only a slight decrease in of up to 1.5 K for the Ag-doped YBCO films on all substrates, we found significant changes in their transport characteristics. The effect of the silver doping mainly depended on the concentration of silver, the type of substrate, and the temperature and magnetic field. In general, the greatest improvement in over a wide range of magnetic fields and temperatures was observed for the 5%Ag-doped YBCO films on STO substrates, showing a significant increase compared to undoped films. Furthermore, a slight improvement was observed for the 2%Ag-doped YBCO films on the RABiTS templates at temperatures below 65 K, whereas decreased for the Ag-doped films on IBAD-MgO-based templates compared to undoped YBCO films. Using detailed electron microscopy studies, small changes in the local microstructure of the Ag-doped YBCO films were revealed; however, no clear correlation was found with the transport properties of the films.

摘要

我们报道了通过脉冲激光沉积在SrTiO（STO）单晶以及基于离子束辅助沉积（IBAD）和轧制辅助双轴织构衬底（RABiTS）的金属模板上制备的厚度达1 µm的未掺杂和Ag掺杂YBaCuO（YBCO）薄膜的局部结构和超导特性。X射线衍射分别证明了在单晶衬底和金属基模板上薄膜具有高结晶质量。尽管所有衬底上的Ag掺杂YBCO薄膜的超导转变温度仅略有下降，最高达1.5 K，但我们发现其输运特性有显著变化。银掺杂的影响主要取决于银的浓度、衬底类型以及温度和磁场。一般来说，对于STO衬底上5%Ag掺杂的YBCO薄膜，在很宽的磁场和温度范围内观察到超导转变温度有最大改善，与未掺杂薄膜相比有显著提高。此外，对于RABiTS模板上2%Ag掺杂的YBCO薄膜，在温度低于65 K时观察到超导转变温度略有改善，而对于基于IBAD-MgO模板的Ag掺杂薄膜，与未掺杂的YBCO薄膜相比超导转变温度降低。通过详细的电子显微镜研究，揭示了Ag掺杂YBCO薄膜局部微观结构的微小变化；然而，未发现与薄膜的输运性质有明确的相关性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5af1/9369561/0da6a9547414/materials-15-05354-g007.jpg
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