Abstract
Polarized neutron off-specular and grazing-incidence small-angle scattering measurements are useful methods to investigate the in-plane structure and its correlation of layered systems. Although these measurements give information on complementary and overlapping length scale, the different characteristics between them need to be taken into account when performed. In this study, the difference in the accessible length scale of the in-plane structure, which is one of the most important characteristics, was discussed using an Fe/Si multilayer together with simulations based on the distorted wave Born approximation.
Highlights
Layered magnetic structures exhibit interesting and important magnetic properties which are not present in the bulk, such as exchange coupling between layers, giant magnetoresistance, and tunnel magnetoresistance [1, 2, 3]
Since there is a difference between the Off-specular scattering (OSS) and grazing-incidence small-angle scattering (GISAS) in the accessible range and resolution of the lateral component of the momentum transfer q, one has to verify if the length scale of the in-plane structure of the sample matches the in-plane q-range and resolution [4]
The OSS and GISAS data were analyzed in the framework of the distorted wave Born approximation (DWBA) given by Toperverg et al [4, 7, 8]
Summary
Layered magnetic structures exhibit interesting and important magnetic properties which are not present in the bulk, such as exchange coupling between layers, giant magnetoresistance, and tunnel magnetoresistance [1, 2, 3]. Since there is a difference between the OSS and GISAS in the accessible range and resolution of the lateral component of the momentum transfer q, one has to verify if the length scale of the in-plane structure of the sample matches the in-plane q-range and resolution [4]. The interpretation of the data can be different if the lateral dimension of the in-plane structure of the sample is sufficiently small or large compared with the in-plane component of the coherence volume in that dimension.
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