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首页> 外文期刊>Physica, C. Superconductivity and its applications >Growth studies of Ba1-x(K-x)BiO3-delta thin films by pulsed-laser deposition
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Growth studies of Ba1-x(K-x)BiO3-delta thin films by pulsed-laser deposition

机译:Ba1-x(K-x)BiO3-δ薄膜的脉冲激光沉积生长研究

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摘要

A study is presented on pulsed-laser deposition of thin films of Ba1-xKxBiO3-delta (BKBO) and its parent compound BaBiO3-delta (BBO). BKBO is a non-cuprate high-T-C (similar to30 K) superconductor with relatively long coherence length (similar to5 nm) and shows BCS like behavior. Therefore, BKBO is an attractive candidate for superconducting electronic device applications, Furthermore, the insulator BBO is suitable as barrier material, We deposited BKBO thin films from potassium-overdoped targets (Ba0.6K0.8BiO3-delta) in order to compensate for the volatility of potassium in our efforts to obtain superconducting Ba1-xKxBiO3-delta (x = 0.3-0.4) thin films. The deposition parameters and annealing procedure were optimized to achieve good quality films, Especially, the substrate temperature is important, because it influences simultaneously the content of potassium and crystallinity of the growing film. This combination hampers the optimization, because they cannot be controlled independently. Furthermore, we will present our first attempts to control the stoichiometry using intervals of different pulsed-laser repetition rates. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 8]
机译:提出了关于Ba1-xKxBiO3-delta(BKBO)及其母体化合物BaBiO3-delta(BBO)薄膜的脉冲激光沉积技术的研究。 BKBO是一种非杯形高T-C(类似于30 K)超导体,具有相对长的相干长度(类似于5 nm),并显示出类似BCS的行为。因此,BKBO是超导电子设备应用的有吸引力的候选材料,此外,绝缘体BBO适合用作阻挡材料。我们从钾掺杂的靶材(Ba0.6K0.8BiO3-delta)沉积了BKBO薄膜,以补偿挥发性。钾在我们努力获得超导Ba1-xKxBiO3-δ(x = 0.3-0.4)薄膜中的作用。优化沉积参数和退火工艺以获得高质量的薄膜,尤其是基板温度非常重要,因为它同时影响钾含量和生长薄膜的结晶度。这种组合妨碍了优化,因为它们无法独立控制。此外,我们将展示我们使用不同脉冲激光重复频率的间隔来控制化学计量的首次尝试。 (C)2002 Elsevier Science B.V.保留所有权利。 [参考:8]

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