Several technologies have been used to fabricate biaxially textured YBCO-coated conductors on metallic substrates, including inclined substrate deposition , ion beam-assisted deposition , and rolling-assisted biaxially textured substrate (RABiTS) . Among them, the RABiTS approach appears to be one of the most promising routes for scale-up processing of the second-generation HTS strips due to its easily controlled buffer growth, highly textured substrates, and cost-effective
processing techniques such as chemical solution deposition (CSD) [5–7]. A wide variety of oxide materials, such as cerium oxide (CeO2), yttria-stabilized zirconia (YSZ), yttrium oxide (Y2O3), and La2Zr2O7 (LZO), have been successfully used as potential buffer
layers for the preparation of YBCO-coated conductor [8, 9]. Among them, CeO2 (cubic, a = 5.41 learn more Å, lattice mismatch CeO2/NiW = 8.2%, and YBCO/CeO2 = 0.52%) is a preferred and well-examined buffer layer that grows nicely due to its chemical FHPI mw stability and lattice match with the NiW substrate and YBCO superconducting layer . Unfortunately, epitaxial CeO2 films crack extensively when the thickness of CeO2 film exceeds 100 nm. Therefore, a stack of CeO2/YSZ/CeO2 or CeO2/YSZ/Y2O3 is commonly used as an effective buffer architecture satisfying the epitaxial growth of YBCO-coated conductors. LZO films have been applied effectively as a buffer layer for YBCO-coated conductors prepared by various methods. From the results of previous studies, Ying et al. reported that they prepared CeO2/LZO and single LZO buffer layers for YBCO films by pulsed laser deposition (PLD) [11, 12]. Knoth et al. reported that they fabricated LZO buffer layer by CSD with the out-of-plane texture Δω = 7.2° and the in-plane texture Δφ = 6.9° . Wee et al. reported that they obtained LZO films by slot die coating of CSD with the out-of-plane texture of Δω = 5.7° and the in-plane texture of Δφ = 6.7° . However, the low texture and rough
surface morphology of LZO film Acetophenone cannot satisfy the requirements of the epitaxial growth of high-performance YBCO film. Therefore, it is necessary to prepare an LZO film with high in-plane and out-of-plane textures and smooth surfaces in order to achieve an YBCO film with high critical current density (J c ). In the present work, we fabricate highly textured LZO films on the CeO2, YSZ/CeO2, and CeO2/YSZ/CeO2 buffered NiW tapes under optimal conditions by radio frequency (RF) magnetron sputtering. The microstructure and surface morphology of LZO film are investigated. YBCO-coated conductors are prepared on the LZO/CeO2, LZO/YSZ/CeO2, and LZO/CeO2/YSZ/CeO2 buffer architectures, and we also discuss the Repotrectinib superconductivity of YBCO-coated conductors.