| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Improvement of Surface Morphology of Yttrium-Stabilized Zirconia Films Deposited by Pulsed Laser Deposition on Rolling Assisted Biaxially Textured Substrate Tapes |
| WANG Meng-Lin, LIU Lin-Fei, LI Yi-Jie**, |
Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240
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| Cite this article: |
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WANG Meng-Lin, LIU Lin-Fei, LI Yi-Jie 2015 Chin. Phys. Lett. 32 116802 |
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Abstract The surface morphology of buffer layer yttrium-stabilized zirconia (YSZ) of YBa2Cu3O7?σ (YBCO) high temperature superconducting films relies on a series of controllable experimental parameters. In this work, we focus on the influence of pulsed laser frequency and target crystalline type on surface morphology of YSZ films deposited by pulsed laser deposition (PLD) on rolling assisted biaxially textured substrate tapes. Usually two kinds of particles are observed in the YSZ layer: randomly distributed ones on the whole film and self-assembled ones along grain boundaries. SEM images are used to prove that particles can be partly removed when choosing dense targets of single crystalline. Lower frequency of pulsed laser also contributes to a smoother film surface. TEM images are used to view the crystalline structure of thin film. Thus we can obtain a basic understanding of how to prepare a particle-free YSZ buffer layer for YBCO in optimized conditions using PLD. The YBCO layer with nice structure and critical current density of around 5 MA/cm2 can be reached on smooth YSZ samples.
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Received: 22 August 2015
Published: 01 December 2015
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| PACS: |
68.55.J-
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(Morphology of films)
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68.55.Ln
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(Defects and impurities: doping, implantation, distribution, concentration, etc.)
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68.37.Hk
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(Scanning electron microscopy (SEM) (including EBIC))
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