Originally developed technique based on generation of plasma-cluster flux emitted from cathode spots at surface of an integrally cold cathode has been applied for deposition of niobium superconductive (thick) film materials. Possibility for depositing thick film coatings in homogeneous, heterogeneous and layered structures is shown to be feasible. Experimental results of mechanical tests including Tensile Testing resulting in stretching of coatings are presented. Critical temperature, current density and magnetic field of deposited superconducting films with various types of structural compositions have been investigated. Niobium-titanium layered coating films deposited by Ionic-plasma clusters method are characterized by very high parameters of critical current density. All results reveal coating material high value in terms of manufacturability. Low cost, high reliability and ease of implementation of new technology for a wide-scale production of superconducting film materials have been demonstrated.
The microstructure, mechanical properties and thermal stability of AlTiN and AlTiBN coatings grown by reactive high-power impulse magnetron sputtering (HiPIMS) have been analyzed as a function of Al/(Al+Ti) ratio, x, between 0.5 and 0.8. The coatings were predominantly formed by a face-centered cubic Ti(Al)N crystalline phase, both with and without B, even for x ratios as high as 0.6, which is higher than the ratio typically encountered for AlTiN coatings deposited by reactive magnetron sputtering. B doping, in combination with the highly energetic deposition conditions offered by HiPIMS, resu…
The residual stress plays a vital role in determination of the device performance that uses thin films coating and thus the accurate determination of stress and its optimization with process parameters is an ongoing research work for many decades. In line with this, the microscopic origin of the stress at the atomic scale and its development during the thin film deposition is a matter of major scientific interests. The development of stress is a complex phenomenon and has a complex dependence to process parameters, film microstructure and its morphology. In this work, by utilizing a custom-des…
Comparison of mechanical properties of Ag/W1-xTixB2.5 and pure silver coatings deposited by PLD/HIPIMS method
Institute of Fundamental Technological Research POLISH ACADEMY OF SCIENCES（波兰科学院基础技术研究所）；Warsaw University of Technology, Faculty of Materials Science and Engineering（华沙理工大学材料科学与工程学院）
Low-loss deposited dielectrics will benefit superconducting devices such as integrated superconducting spectrometers, superconducting qubits and kinetic inductance parametric amplifiers. Compared with planar structures, multi-layer structures such as microstrips are more compact and eliminate radiation loss at high frequencies. Multi-layer structures are most easily fabricated with deposited dielectrics, which typically exhibit higher dielectric loss than crystalline dielectrics. We measured the sub-kelvin and low-power microwave and mm-submm wave dielectric loss of hydrogenated amorphous sili…
Ion Energy Tuning for Enhanced sp3 Carbon Fraction in Electron Cyclotron Resonance Ion Beam Deposited Diamond-Like Carbon Coatings: a Computational and Experimental Approach
Amorphous insulating MoS$_x$ films deposited by magnetron sputtering as a low-index optical coating
P.N. Lebedev Physical Institute of the Russian Academy of Sciences（俄罗斯科学院列别杰夫物理研究所）；National Research University "MPEI"（国立研究型大学莫斯科动力学院）；Moscow Institute of Physics and Technology（莫斯科物理技术学院）
Paper-based spintronics: magneto-resistivity of permalloy deposited onto paper substrates
由于低成本、资源丰富和独特的材料特性，纸张在电子、光学和流体领域的应用正在研究之中。考虑到传统上制造到无机半导体材料上的基于磁阻原理（各向异性、巨型、隧道）的传感器系统，我们建议主要出于降低成本的目的使用纸基板。特别是，我们研究了坡莫合金（Py：Ni 81 Fe 19）到纸衬底上的磁阻灵敏度。在这项工作中，我们报告了我们对洁净室纸（80 g/m2，Rrms = 2.877 μm，23%表面孔隙率，乳胶浸渍，无压花宏观结构）的研究结果。这里，Py：Ni 81 Fe 19涂层通过干法、溅射沉积制造，并且跨越10 X 10 mm 2的面积和70 nm的厚度。采用四探针直流电阻率测量装置，研究了Py：Ni_（81）Fe_（19）在外加定向磁场作用下的电阻变化。特别地，我们研究了两种配置下的磁阻变化：（1）磁场的方向平行于标称感应电流和（2）磁场的方向垂直于电流。由于与Py：Ni 81 Fe 19涂层相互作用的纤维的随机取向，在两种测量配置下的整个系统的磁阻的变化密切对应于Py：Ni 81 Fe 19在电流方向和磁场之间的+/-45°角处的经典响应。利用磁光克尔效应，我们观察到畴壁的形成在光纤弯曲的位置。未来的工作将集中在层厚度，纤维尺寸和磁性涂层的结构对纸基Py：Ni 81 Fe 19磁阻器的性能的影响。
HVAF Spraying of NiTi Coatings: Microstructure, Phase Transformation and Shape Memory Behavior
Institute of Physics of the Czech Academy of Sciences（捷克科学院物理研究所）；Department of Engineering Science, University West（韦斯特大学工程科学系）；Palacký University in Olomouc, Faculty of Science（奥洛穆茨帕拉茨基大学理学院）；Joint Laboratory of Optics of Palacký University and Institute of Physics AS CR（帕拉茨基大学与捷克科学院物理研究所联合光学实验室）；Oak Ridge National Laboratory（橡树岭国家实验室）
Understanding adhesion at as-deposited interfaces from ab initio thermodynamics of deposition growth: thin-film alumina on titanium carbide
我们研究了化学气相沉积薄膜氧化铝在TiC上的化学组成和粘附性，使用并扩展了最近提出的沉积生长从头算热力学（AIT-DG）的非平衡方法[Rohrer J和Hyldgaard P 2010 Phys. Rev. B 82 045415]。该系统的先前研究[Rohrer J，Ruberto C和Hyldgaard P 2010 J. Phys.：康登斯Matter 22 015004]发现，使用平衡热力学导致非结合TiC/氧化铝界面的预测，尽管工业上用作耐磨涂层。平衡理论和实验之间的这种差异是解决的AIT-DG方法预测界面强粘附。AIT-DG方法结合了密度泛函理论计算、沉积环境压力演化的速率方程模型和热化学数据。AIT-DG方法以前用于预测二元材料的生长或沉积表面的普遍终止。在这里，我们扩展的方法来预测生长或沉积薄膜在衬底上的表面和界面组合物，并发现，包括非平衡沉积环境的埋界面的性质有重要的影响。
Study of amorphous alumina coatings for next-generation nuclear reactors: hightemperature in-situ and post-mortem Raman spectroscopy and X-ray diffraction
Silver (Ag) mirrors for astronomical telescopes consist of multiple metallic and dielectric thin films. Furthermore, the topmost surface of such Ag mirrors needs to be covered by a protection coating. While the protection coating is often deposited at room temperature and the entire mirrors are also handled at room temperature, various thin film deposition techniques offer protection coatings with improved characteristics when carried out at elevated temperatures. Thus, in this work, high-performance Ag mirrors were designed and fabricated with a new benchmark. The resulting Ag mirrors were an…
Effects of withdrawal speeds on the structural, morphological, electrical, and optical properties of CuO thin films synthesized by dip-coating for CO2 gas sensing
Amorphous mixed titania-tantala coatings are key components of Bragg reflectors in the gravitational wave detectors (GWDs). Attaining the lowest possible values of optical absorption and mechanical losses in the coatings is of paramount importance for GWDs, and this requires a complex optimization of the coating deposition and post-deposition annealing. We present here a systematic investigation of the optical properties and internal friction of amorphous mixed titania-tantala coatings grown by ion beam sputtering. We consider coatings with six different cation mixing ratios and we study them …
An environmentally stable mesoscopic thin film of Au of certain thickness has been deposited thermally on top of a Ag+ implanted oxide substrate to develop a close to room temperature superconductor. This thin film has been deposited in two different stages. Initially, a sol-gel derived ion conducting metal oxide (ICMO) thin film has been deposited by spin coating. Afterward, Ag+ has been introduced inside ICMO thin film by a chemical method. Following this, a thin layer of Au has been deposited on top of that Ag ion-implanted oxide via thermal evaporation. The temperature dependent resistivit…
Tin (IV) oxide (SnO2) sols have been synthesized from SnCl2.2H2O precursor solution by applying two different processing conditions. The prepared sols were then deposited on UV-Ozone treated quartz and soda lime glass (SLG) substrates by spin coating. The as-synthesized film was soft-baked at about 100 deg. C. for 10 min. This process was repeated five times to get a compact film, followed by air-annealing at 250 deg. C. for 2 hours. The pristine and annealed films were characterized by UV-Vis-NIR spectroscopy, Grazing Incident X-Ray Diffraction (GIXRD), and Field Emission Scanning Electron Mi…
