Grazing Incidence Small-Angle Neutron Scattering: Background Determination and Optimization for Soft Matter Samples

Kyrey, Tetyana; Ganeva, Marina; Witte, Judith; Feoktystov, Artem; Wellert, Stefan; Holderer, Olaf

doi:10.3390/app11073085

Cited by 6 publications

(3 citation statements)

References 42 publications

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“…and horizontal instrument axes. et al, 2007;Ruderer et al, 2012;Kyrey et al, 2021) but, to date, has not been comprehensively reported on for the study of magnetic nanostructures in low-dimensional condensed matter systems.…”

Section: Near-surface Sansmentioning

confidence: 99%

Small-angle neutron scattering of long-wavelength magnetic modulations in reduced sample dimensions

et al. 2023

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Magnetic small-angle neutron scattering (SANS) is ideally suited to providing direct reciprocal-space information on long-wavelength magnetic modulations, such as helicoids, solitons, merons or skyrmions. SANS of such structures in thin films or micro-structured bulk materials is strongly limited by the tiny scattering volume vis a vis the prohibitively high background scattering by the substrate and support structures. Considering near-surface scattering just above the critical angle of reflection, where unwanted signal contributions due to substrate or support structures become very small, it is established that the scattering patterns of the helical, conical, skyrmion lattice and fluctuation-disordered phases in a polished bulk sample of MnSi are equivalent for conventional transmission and near-surface SANS geometries. This motivates the prediction of a complete repository of scattering patterns expected for thin films in the near-surface SANS geometry for each orientation of the magnetic order with respect to the scattering plane.

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Section: Near-surface Sansmentioning

confidence: 99%

Small-angle neutron scattering of long-wavelength magnetic modulations in reduced sample dimensions

et al. 2023

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“…4(a)]. Transmission scattering is especially severe for GISANS (Kyrey et al, 2021). Scattering below the horizon is thus a sign of background contributions associated with the direct beam.…”

Section: Q Ymentioning

confidence: 99%

Strategy to simulate and fit 2D grazing-incidence small-angle X-ray scattering patterns of nanostructured thin films

Jung¹,

Papadakis²

2023

J Appl Cryst

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Grazing-incidence small-angle X-ray scattering (GISAXS) is a widely used method for the characterization of the nanostructure of supported thin films and enables time-resolved in situ measurements. The 2D scattering patterns contain detailed information about the nanostructures within the film and at its surface. However, this information is distorted not only by the reflection of the X-ray beam at the substrate–film interface and its refraction at the film surface but also by scattering of the substrate, the sample holder and other types of parasitic background scattering. In this work, a new, efficient strategy to simulate and fit 2D GISAXS patterns that explicitly includes these effects is introduced and demonstrated for (i) a model case nanostructured thin film on a substrate and (ii) experimental data from a microphase-separated block copolymer thin film. To make the protocol efficient, characteristic linecuts through the 2D GISAXS patterns, where the different contributions dominate, are analysed. The contributions of the substrate and the parasitic background scattering – which ideally are measured separately – are determined first and are used in the analysis of the 2D GISAXS patterns of the nanostructured, supported film. The nanostructures at the film surface and within the film are added step by step to the real-space model of the simulation, and their structural parameters are determined by minimizing the difference between simulated and experimental scattering patterns in the selected linecuts. Although in the present work the strategy is adapted for and tested with BornAgain, it can be easily used with other types of simulation software. The strategy is also applicable to grazing-incidence small-angle neutron scattering.

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“…The last technical paper in this issue focuses on the impact of SANS background in the case of grazing incidence SANS (GISANS) [7]. GISANS has been developed into a method in its own right over the last decades; however, it still remains closely linked to SANS, both scientifically and technologically.…”

mentioning

confidence: 99%

Recent Advances in Small-Angle Neutron Scattering

Jaksch¹

2021

Applied Sciences

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Grazing Incidence Small-Angle Neutron Scattering: Background Determination and Optimization for Soft Matter Samples

Cited by 6 publications

References 42 publications

Small-angle neutron scattering of long-wavelength magnetic modulations in reduced sample dimensions

Small-angle neutron scattering of long-wavelength magnetic modulations in reduced sample dimensions

Strategy to simulate and fit 2D grazing-incidence small-angle X-ray scattering patterns of nanostructured thin films

Recent Advances in Small-Angle Neutron Scattering

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