Accessible length scale of the in-plane structure in polarized neutron off-specular and grazing-incidence small-angle scattering measurements

Maruyama, Ryuji; Bigault, T.; Wildes, A.; Dewhurst, C. D.; Saerbeck, Thomas; Honecker, Dirk; Yamazaki, Dai; Soyama, Kazuhiko; Courtois, P.

doi:10.1088/1742-6596/862/1/012017

Cited by 7 publications

(4 citation statements)

References 15 publications

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“…The combination of the 9.6 Â 10 9 n cm À2 s À1 white-beam flux on the sample and the uniform lateral response of the new detector system makes D17 particularly suited to off-specular studies. The number of experiments explicitly using these capabilities is therefore increasing (Adlmann et al, 2016;Pambou et al, 2016;Maruyama et al, 2016Maruyama et al, , 2017.…”

Section: Discussionmentioning

confidence: 99%

Recent upgrades of the neutron reflectometer D17 at ILL

et al. 2018

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1 This article will form part of a virtual special issue on advanced neutron scattering instrumentation, marking the 50th anniversary of the journal.The vertical sample-plane reflectometer D17 at the Institut Laue-Langevin in Grenoble, France, has undergone several major upgrades since its commissioning, which are summarized in this article. The three major improvements are (i) a new focusing guide, increasing the usable flux on the sample by a factor of 2.5; (ii) a new beam polarizer and new spin flippers, allowing for the use of polarized neutrons in time-of-flight mode; and (iii) a new detector with a particularly uniform response under homogeneous exposure, improved stability and state-of-the-art detector electronics. The combination of these factors has paved the road to new possibilities in fast kinetic measurements, magnetism and off-specular scattering. Examples and scientific references for the new capabilities are presented.

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Section: Discussionmentioning

confidence: 99%

Recent upgrades of the neutron reflectometer D17 at ILL

et al. 2018

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“…It was, however, not possible to determine the value of ξ mx precisely because the simulated profiles did not vary with the decreasing value of ξ mx . The length of the coupled area was too small compared with the length scale of the OSS measurement [43]. Figure 2.…”

Section: Polarized Oss Measurementmentioning

confidence: 97%

“…These values considerably differed from those determined by the OSS. This can be attributed to the difference in the accessible length scale between the OSS and GISANS [43]. In addition, ξ my was determined without ambiguity because the intensity profile in q y did not depend on the Fresnel coefficients [22].…”

Section: Polarized Gisans Measurementmentioning

confidence: 99%

Coherent Magnetization Rotation of a Layered System Observed by Polarized Neutron Scattering under Grazing Incidence Geometry

et al. 2019

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The in-plane magnetic structure of a layered system composed of polycrystalline grains smaller than the ferromagnetic exchange length was studied to elucidate the mechanism controlling the magnetic properties considerably different from the bulk using polarized neutron scattering under grazing incidence geometry. The measured result, together with quantitative analysis based on the distorted wave Born approximation, showed that the in-plane length of the area with a uniform orientation of moments ranging from 0.5–1.1 μ m was not significantly varied during the process of demagnetization followed by remagnetization. The obtained behavior of moments is in good agreement with the two-dimensional random anisotropy model where coherent magnetization rotation is dominant.

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“…OSS from lateral structures provides magnetization vectors, distances and in-plane correlations between domains or structural elements. While OSS can typically resolve structures between 500 and 100 µm, smaller structures can be investigated using grazing incidence neutron diffraction (GIND) [30]. The lateral and transverse resolution of PNR and OSS depends on the instrumental configuration, namely, the angular and wavelength resolution applied in the experiment.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Structure of Ion-Beam Imprinted Stripe Domains Determined by Neutron Scattering

et al. 2020

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We present a detailed analysis of the in-plane magnetic vector configuration in head-to-head/tail-to-tail stripe domain patterns of nominal 5 μm width. The patterns have been created by He-ion bombardment induced magnetic patterning of a CoFe/IrMn3 exchange bias thin-film system. Quantitative information about the chemical and magnetic structure is obtained from polarized neutron reflectometry (PNR) and off-specular scattering (OSS). The technique provides information on the magnetic vector orientation and magnitude along the lateral coordinate of the sample, as well as the chemical and magnetic layer structure as a function of depth. Additional sensitivity to magnetic features is obtained through a neutron wave field resonance, which is fully accounted for in the presented analysis. The scattering reveals a domain width imbalance of 5.3 to 3.7 μm of virgin and bombarded stripes, respectively. Further, we report that the magnetization in the bombarded stripe significantly deviates from the head-to-head arrangement. A domain wall of 0.6 μm with homogeneous magnetization direction is found to separate the two neighboring domains. The results contain detailed information on length scales and magnetization vectors provided by PNR and OSS in absolute units. We illustrate the complementarity of the technique to microscopy techniques for obtaining a quantitative description of imprinted magnetic domain patterns and illustrate its applicability to different sample systems.

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Accessible length scale of the in-plane structure in polarized neutron off-specular and grazing-incidence small-angle scattering measurements

Cited by 7 publications

References 15 publications

Recent upgrades of the neutron reflectometer D17 at ILL

Recent upgrades of the neutron reflectometer D17 at ILL

Coherent Magnetization Rotation of a Layered System Observed by Polarized Neutron Scattering under Grazing Incidence Geometry

Magnetic Structure of Ion-Beam Imprinted Stripe Domains Determined by Neutron Scattering

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