Surface topography and composition of NiPd alloys under oblique and normal gas cluster ion beam irradiation

Ieshkin, A. E.; Kireev, D.S.; Tatarintsev, A. A.; Chernysh, V. S.; Senatulin, B. R.; Скрылева, Е. А.

doi:10.1016/j.susc.2020.121637

Cited by 16 publications

(5 citation statements)

References 35 publications

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“…It is known that two competing processes are responsible for the formation of a stationary surface composition upon irradiation with atomic ions: the preferential sputtering of one of the components as a result of the development of cascades of atomic collisions, on the one hand, and radiation-induced segregation, on the other hand. Our previous experiments [16] and the results shown in Fig. 1 demonstrate that the process of preferential sputtering of alloys under irradiation with cluster ions has much in common with the case of sputtering with atomic ions.…”

Section: Composition and Topography Of The Surface Of Alloys Ni X Pd Ymentioning

confidence: 55%

“…Thus, it is clear that a complete understanding of the role of preferential sputtering during formation of the surface composition of multicomponent materials upon irradiation with cluster ions has not yet been achieved. For example, we recently studied the preferential sputtering of Pd from Ni 5 Pd and NiPd alloys by argon cluster ions [16]. In the present paper, the influence of the concentrations of alloy components on the composition of its surface is studied in more details.…”

Section: Introductionmentioning

confidence: 98%

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Preferential sputtering of alloys by gas cluster ions

et al. 2022

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Topography and composition of the surface of nickel-based alloys under irradiation with Ar2500+ cluster ions with the energy of 20 keV, and atomic Ar+ ions with the energy of 3 keV have been studied. It has been experimentally found that the surface of the alloys is depleted by a component with a lower binding energy. It is shown that the change in the surface concentrations of the alloy components upon irradiation with cluster ions is an order of magnitude greater than upon sputtering with atomic ions. The degree of change in the surface composition is determined by the ratio of the sputtering yields of the alloy components. Keywords: gas cluster ions, ion sputtering, XPS, preferential sputtering, surface topography.

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Section: Composition and Topography Of The Surface Of Alloys Ni X Pd Ymentioning

confidence: 55%

Section: Introductionmentioning

confidence: 98%

Preferential sputtering of alloys by gas cluster ions

et al. 2022

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“…In the literature, it has been reported that the irradiation can lead the stoichiometric ratio of elements in the surface layer and films to change. [42][43][44] Hence, "cation-rich condition" and "anionrich condition" are considered in calculating the formation energy of different defects in this work.…”

Section: Formation Energy Of Point Defects Inmentioning

confidence: 99%

First-principles study of stability of point defects and their effects on electronic properties of GaAs/AlGaAs superlattice

Feng¹,

Jiang²,

Qiu³

et al. 2022

Chinese Phys. B

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When the GaAs/AlGaAs superlattice-based devices are used under irradiation environments, point defects may be created and ultimately deteriorate their electronic and transport properties. Thus, understanding the properties of point defects like vacancies and interstitials is essential for the successful application of semiconductor materials. In the present study, first-principles calculations are carried out to explore the stability of point defects in GaAs/Al0.5Ga0.5As superlattice and their effects on electronic properties. The results show that the interstitial defects and Frenkel pair defects are relatively difficult to form, while the antisite defects are favorably created generally. Besides, the existence of point defects generally modifies the electronic structure of GaAs/Al0.5Ga0.5As superlattice significantly, and most of the defective SL structures possess metallic characteristics. Considering the stability of point defects and carrier mobility of defective states, we propose an effective strategy that AlAs, GaAs, and AlGa antisite defects are introduced to improve the hole or electron mobility of GaAs/Al0.5Ga0.5As superlattice. The obtained results will contribute to the understanding of the radiation damage effects of the GaAs/AlGaAs superlattice, and provide a guidance for designing highly stable and durable semiconductor superlattice-based electronics and optoelectronics for extreme environment applications.

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“…In the Secondary Ion Mass Specroscopy (SIMS), especially organic samples, cluster ions are used as a profiling or analyzing beam, because, unlike atomic ions, large clusters are able to separate analyte molecules from the surface with virtually no destruction of them [6,7]. In the X-ray photoelectron spectroscopy technique (XPS), cluster ions are used for surface cleaning or for depth profiling [8], although the question of selectivity of sputtering (and, consequently, changes in surface composition) of multicomponent matters remains open [9,10].…”

Section: Introductionmentioning

confidence: 99%

Sputtering and ripples formation by gas cluster ions on LiNbO-=SUB=-3-=/SUB=- crystal

Ieshkin

Kiselev

Senatulin

et al. 2022

Physics of the Solid State

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The work addresses the creation of surface structures on lithium niobate single crystals. Surface topography of lithium niobate surface sputtered with gas cluster ion beams was investigated. Surface ripples induced on the surface were analyzed using power spectral density functions approach, their evolution with ion fluence and their dependence on the cluster ion energy discussed. Sputter yield value was shown to decrease with surface roughness increase, the reasons of the effect are indicated. Local piezoresponse of the rippled surface was studied. Keywords: ferroelectrics, LiNbO3 crystal, gas cluster ions, self-organization, AFM, PSD function.

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Surface topography and composition of NiPd alloys under oblique and normal gas cluster ion beam irradiation

Cited by 16 publications

References 35 publications

Preferential sputtering of alloys by gas cluster ions

Preferential sputtering of alloys by gas cluster ions

First-principles study of stability of point defects and their effects on electronic properties of GaAs/AlGaAs superlattice

Sputtering and ripples formation by gas cluster ions on LiNbO-=SUB=-3-=/SUB=- crystal

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