Electron beam induced surface modification of amorphous Sb2Se3 thin film

Shiman, Oksana; Gerbreders, V.; Sļedevskis, Ē.; Paškevičs, V.

doi:10.1016/j.jnoncrysol.2012.02.013

Cited by 8 publications

(4 citation statements)

References 10 publications

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“…The pressure of the evaporated material on the molten displaces the liquid material to edge of the dimple [22,24]. The shape of the dimples is a spherical cap that is commonly called U-type [29][30][31][32]. This shape is due to only the Gaussian peak of the laser beam having sufficient energy to ablate the material [32].…”

Section: Topographymentioning

confidence: 99%

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Influence of Pulse Energy and a Material’s Magnetic Field on the Morphology of the Dimples Produced with Nanosecond Pulsed Laser on a Magnet

Ahuir-Torres

Sharp

2022

Lasers Manuf. Mater. Process.

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Magnets made of NdFeB alloys are applied in numerous industries because they have excellent magnetic properties and good thermal stability. However, their low corrosion resistance and fragility reduce the number of the applications in harsh environments. Laser surface texturing is a powerful technique to improve the properties of materials via surface functionalisation. The characteristics of the textures define the properties of the functionalised surfaces and the laser parameters in turn influence the texture features. Pulse energy is a laser parameter with high influence on the geometry and the morphology of the textures. The magnetic field of these magnets are also expected to have an influence on the texture features. In this present work, the influence of the pulse energy (from 5µJ to 696µJ) on the dimple characteristics created with an infrared (1064 nm) nanosecond pulsed (200ns) fibre laser single pulses on NdFeB alloy (magnetic material) have been studied. The shape features of the laser textures on the samples were analysed through optical microscopy and profilometry. This work shows that the single pulses produced textures of U-type dimple kind on the metallic material. The shapes of the dimples were also altered by magnetic field of the material, which indicates that the magnetic properties of the alloys remain in liquid state. The factors of the laser beam-material interaction, pulse energy and energy depth penetration, are furthermore presented in this paper. These factors can be employed to design the width, diameter and depth of the dimples.

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Section: Topographymentioning

confidence: 99%

“…The study showed that the geometry of the dimples on NdFeB alloy had acceptable quality. The dimple shape was U-type [29][30][31][32]. Moreover, the factors of the laser beam-material interaction (energy depth penetration, pulse energy and energy fluence threshold) have been measured in this study.…”

Section: Introductonmentioning

confidence: 99%

Influence of Pulse Energy and a Material’s Magnetic Field on the Morphology of the Dimples Produced with Nanosecond Pulsed Laser on a Magnet

Ahuir-Torres

Sharp

2022

Lasers Manuf. Mater. Process.

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“…The dimple form has a spherical cap. These dimples are therefore classified as U-type [66][67][68][69]. This geometry arises as the Gaussian peak of the laser beam possesses sufficient energy to ablate the metallic material [31,69,70].…”

Section: Topographymentioning

confidence: 99%

Effect of Surface Roughness on the Surface Texturing of 316 l Stainless Steel by Nanosecond Pulsed Laser

Al-Mahdy

Kotadia

Sharp

et al. 2022

Lasers Manuf. Mater. Process.

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Stainless steel 316L is an austenitic alloy that is widely used in varying industries due to its outstanding corrosion resistance, high strength, and ductility properties. However, the wear and friction resistance properties are low. Laser surface texturing can improve the wear and friction resistance of the material via the functionalisation of the surface. The laser surface texturing efficiency and the texture quality are defined by the material’s surface properties and laser parameters. The surface roughness is an important material property having an effect on laser surface texturing. This paper reports on a study of the material’s surface roughness influence on the texturing of 316L stainless steel with 1064 nm nanosecond pulsed laser. Single pulse shots were employed to avoid the topographic influence of the previous laser shots. The surface shape and the topography of the textures were assessed using optical microscopy and profilometry. It was observed that the textures produced were dimples of U-type and sombrero-like type geometries depending on surface roughness and pulse energy. The overall quality of the texture shape was better for smoother surfaces. The energy fluence necessary to generate textures is lower on surfaces of lower roughness than surfaces with high roughness. The surface at 24 nm of average roughness is the best surface for creating deep textures. The ablation mechanisms associated with high pulse energy, including plasma shielding, are produced at lower pulse energies for the 100 nm roughness, compared with other roughness samples.

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“…Applications in phase-change memories [1,2] and in detectors for medical imaging [3] and electron beam (EB) lithography seem most remarkable. Today the study of interaction between ChG and EB is an actual task; a number papers have been published on EB induced reliefs in stoichiometric [4] and non-stoichiometric [5,6] As-S thin films, experimental results on electron beam induced reliefs in Ge-Se [7], Sb-S [8] and Sb-Se [9] thin films, investigation of recording on Se/As 2 S 3 and Sb/As 2 S 3 nanolayered structures [10].…”

Section: Introductionmentioning

confidence: 99%