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首页> 外文期刊>RSC Advances >Chemical solution deposition of Y1-xGdxBa2Cu3O7--BaHfO3 nanocomposite films: combined influence of nanoparticles and rare-earth mixing on growth conditions and transport properties
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Chemical solution deposition of Y1-xGdxBa2Cu3O7--BaHfO3 nanocomposite films: combined influence of nanoparticles and rare-earth mixing on growth conditions and transport properties

机译：Y1-XGDXBA2Cu3O7 - BaHFO3纳米复合膜的化学溶液沉积：纳米粒子和稀土混合对生长条件和运输性能的综合影响

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摘要

Y1-xGdxBa2Cu3O7--BaHfO3 (YGBCO-BHO) nanocomposite films containing 12 mol% BHO nanoparticles and different amounts of Gd were prepared by chemical solution deposition following the trifluoroacetic route on SrTiO3 single crystals in order to study the influence of the rare earth stoichiometry on structure, morphology and superconducting properties of these films. We optimized the growth process for each of several Gd contents of the 220 nm thick YGBCO-BHO films by varying crystallization temperature and oxygen partial pressure. This optimization process led to the conclusion that mixing the rare earths in YGBCO-BHO films leads to wider growth parameter windows compared to YBCO-BHO and GdBCO-BHO films giving larger freedom for selecting the most convenient processing parameters in order to adapt to different substrates or applications which is very important for the industrial production of coated conductors. The optimized films show a continuous increase of T-c with Gd content x from approximate to 90 K for the YBCO-BHO films to approximate to 94 K for the GdBCO-BHO films. Consequently, an increase of the 77 K self-field J(c) with Gd content is observed reaching values 7 MA cm(-2) for Gd contents x 0.5. The transport properties of these films under applied magnetic fields are significantly improved with respect to the pristine YBCO films. All YGBCO-BHO nanocomposite films grew epitaxially with c-axis orientation and excellent out-of-plane and in-plane texture. The films are dense with a low amount of pores and only superficial indentations.
机译：通过在SRTIO3单晶的三氟乙酸碱路线上通过化学溶液沉积制备含有12mol％BHO纳米颗粒和不同量Gd的Y1-XGDXBA2Cu3O7 - BaHFO 3（YGBCO-BHO）纳米复合材料。为了研究稀土化学计量的影响这些薄膜的结构，形态和超导性能。通过改变结晶温度和氧分压，优化了220nm厚YGBCO-BHO膜的几个GD含量的每个GD含量的生长过程。这种优化过程导致了与YBCO-BHO和GDBCO-BHO薄膜相比，将稀土化的稀土混合导致更广泛的生长参数窗口，使得选择最方便的处理参数，以适应不同的基板或对涂层导体的工业生产非常重要的应用。优化的薄膜显示出与GD含量X的T-C连续增加，从近似为YBCO-BHO薄膜的90k，以近似到GDBCO-BHO膜的94k。因此，观察到具有GD含量的77k自磁场J（c）的增加达到值＆ 7 mA cm（-2）用于GD含量x＆ 0.5。相对于原始YBCO薄膜显着改善了应用磁场下这些薄膜的运输性能。所有ygbco-bho纳米复合膜外延呈C轴取向和优异的外平面和面内纹理。薄膜具有较少量的毛孔和浅表凹痕。

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  • 来源
    《RSC Advances》 |2018年第74期|共7页
  • 作者

    Cayado Pablo; Erbe Manuela; Kauffmann-Weiss Sandra; Jung Alexandra; Haenisch Jens; Holzapfel Bernhard;

  • 作者单位

    KIT Inst Tech Phys ITEP Hermann von Helmholtz Pl 1 D-76344 Eggenstein Leopoldshafen Germany;

    KIT Inst Tech Phys ITEP Hermann von Helmholtz Pl 1 D-76344 Eggenstein Leopoldshafen Germany;

    KIT Inst Tech Phys ITEP Hermann von Helmholtz Pl 1 D-76344 Eggenstein Leopoldshafen Germany;

    KIT Inst Tech Phys ITEP Hermann von Helmholtz Pl 1 D-76344 Eggenstein Leopoldshafen Germany;

    KIT Inst Tech Phys ITEP Hermann von Helmholtz Pl 1 D-76344 Eggenstein Leopoldshafen Germany;

    KIT Inst Tech Phys ITEP Hermann von Helmholtz Pl 1 D-76344 Eggenstein Leopoldshafen Germany;

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  • 正文语种 eng
  • 中图分类 化学;
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