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1
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Influence of Substrate Local Heating on Morphology of~Al and Al_2O_3 Nanofilms

100%
Reszka K., Szczypiński M., Pomorska M.
Acta Physica Polonica A
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2011
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vol. 120
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issue 1
177-180
EN
Experimental investigations presented in this work were focused on the execution of a carousel system with its usability for step-by-step revolutions and the mechanism for clamping the heater, which made it possible to heat substrates individually within the range from 25°C to 300°C. This system was used for depositing the metallic Al films by the magnetron sputtering method on foil made of FeCrAl steel, which found application in the production of metallic catalytic reactors. It was found that in the case of not-heated foil the polycrystalline continuous Al film, which is separated from steel by an amorphous oxide nanofilm obtained spontaneously under influence of weather conditions, was created. The deposition of aluminium on foil heated to the temperature of 300°C caused the film marked by fine grains integrated with small forces to be formed. These differences had an influence on the morphology of the oxide films.
2
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Thermopower and Surface Magnetic Characterization of Ni Thin Layers

80%
Szabo A., Varga R., Ujhelyi F., Komanicky V., Zorkovska A., Lovas A.
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vol. 126
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issue 1
204-205
EN
Thermoelectric power and surface magnetic characterization of Ni evaporated layers will be presented, with the comparison with the bulk Ni material. The bulk electrical and magnetic properties are developed gradually, approaching the bulk properties, as the layer thickness increases. Below the thickness of 180 nm, the evaporated layers are amorphous. The epitaxial stresses can appear in both, the anomaly observed in the thermopower and the surface coercivity measurements.
3
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Multilayered ZnO Films of Improved Quality Deposited by Magnetron Sputtering

80%
Ievtushenko A., Karpyna V., Lashkarev G., Lazorenko V., Baturin V., Karpenko A., Lunika M., Dan'ko A.
Acta Physica Polonica A
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2008
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vol. 114
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issue 5
1131-1137
EN
Multilayered ZnO films were deposited by rf magnetron sputtering on silicon and sapphire substrates. The aim of this work is to improve structural quality of ZnO thin films grown on just listed substrates. Presented X-ray diffraction data testify to remarkable relaxation of compressive stress in two- and three-layered ZnO films in comparison with single-layer one.
4
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Effect of Laser Scribing on Soft Magnetic Properties of Conventional Grain-Oriented Silicon Steel

70%
Petryshynets I., Puchý V., Kováč F., Šebek M.
Acta Physica Polonica A
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2017
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vol. 131
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issue 4
777-779
EN
The present work investigates the influence of laser scribing of grain-oriented silicon steel on the improvement of its soft magnetic properties via magnetic domains modification. The experimental material was represented by conventional Fe-3%Si grain-oriented electrical steel that was taken directly from industrial line after the final box annealing. The laser scribing treatments were applied onto the material surface in order to induce thermal stresses having crucial influence on the magnetic domains refinement. The laser scribing conditions have been optimized by introducing thermal stresses onto the experimental material surface leading to optimal refinement of final domains structures and desired magnetic softness minimization. A semiquantitative relationship has been found between the domain patterns and the used fiber laser treating method. The obtained modified domain structure led to a significant decrease in coercivity measured in DC magnetic field from 20 A/m to 12 A/m.
5
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Influence of Thermal Processing in High Magnetic Field on Soft Magnetic Properties and Crystallographic Texture of Non-Oriented Fe-Si Steels

70%
Petryshynets I., Kováč F., Marcin J., Škorvánek I.
Acta Physica Polonica A
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2017
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vol. 131
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issue 4
783-785
EN
In this work, we report on the effects of high static magnetic field on the formation of desirable crystallographic orientation of grains ("rotating" cube) during the primary recrystallization of non-oriented steels. Vacuum degassed non-oriented steel with the silicon content about 1 wt% was taken from industrial line after final cold rolling with 80% of deformation and then it was subjected to the laboratory annealing at temperature of primary recrystallization. Whole annealing process was carried with and without the applied external magnetic field of 14 T. The analysis of crystallographic orientation of experimental material was studied by electron backscattered diffraction technique. The microstructural and textural observations have shown a small difference in average grain size between samples annealed with and without magnetic field as well as increase of the "rotating" Cube component and decrease of the intensity of deformation texture by application of magnetic field. The magnetic measurements show that the coercivity value of the sample annealed in the magnetic field of 14 T can be reduced by approximately 3% in comparison with sample annealed under the zero field conditions.
6
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Sol-Gel Synthesis of Nanostructured SnO_2 Thin Film Anodes for Li-Ion Batteries

70%
Köse H., Aydin A., Akbulut H.
Acta Physica Polonica A
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2012
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vol. 121
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issue 1
227-229
EN
Sol-gel technique was employed to prepare semiconductor tin dioxide (SnO_2) thin films. Comparatively, it gives an advantage over other techniques by its low reaction temperature, easy process and low cost. The effect of glycerin addition on the structure and preventing crack formation has been investigated. Scanning electron microscopy, atomic force microscopy, and X-ray diffraction analysis were performed to characterize nanostructured films.
7
Content available remote

Surface Morphology Analysis of Composite Thin Films based on Titanium-Dioxide Nanoparticles

70%
Ţălu Ş., Bramowicz M., Kulesza S., Pignatelli F., Salerno M.
Acta Physica Polonica A
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2017
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vol. 131
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issue 6
1529-1533
EN
This study addressed the advanced micro-morphological characterization of 3D surfaces of thin films based on composites of an organic matrix of poly-methyl-methacrylate and inorganic titanium-dioxide nanocrystals. The films were prepared by spin-coating of a series of solutions with increasing loading concentration of the nanocrystals, from 5 up to 40% by weight. The film surfaces were investigated by atomic force microscopy, and the resulting images were analyzed in detail to obtain a full quantitative description of their surface micro-morphology. The fractal analysis of the surface roughness was used to extract the characteristics of amplitude, spatial distribution, and pattern. A fractal geometry was indeed observed, and the corresponding fractal dimension D was determined for all the samples. In view of the possible use of these thin films as functional coatings, the calculated quantities are discussed with respect to the foreseen durability of these surfaces during operation under wear.
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