title: Recovering complex reflection coefficient using the reference layer algorithm for multilayer systems with non-collinear magnetic ordering
metadata.name: dc.contributor.author
metadata.value: Salamatov, Yuri A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Nikova, Ekaterina S.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Devyaterikov, Denis I.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Kravtsov, Evgeny A.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2023-03-14T16:36:32Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2023-03-14T16:36:32Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2022-12
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Salamatov, Y. A., Nikova, E. S., Devyaterikov, D. I., & Kravtsov, E. A. (2023). Recovering complex reflection coefficient using the reference layer algorithm for multilayer systems with non-collinear magnetic ordering. Vestnik of Saint Petersburg University. Applied Mathematics. Computer Science. Control Processes, 18(4), 583-595.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/11701/spbu10.2022.412
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/39315
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: This work analyzes two mathematical algorithms for processing experimental curves in polarized neutron reflectometry, one of which makes it possible to determine the complex reflection coefficient. The approbation was carried out for a Fe/Cr type superlattice with an irregular non-collinear ordering of the magnetic moments of the Fe layers. The processing of the experiment was carried out both by direct refinement of the structure parameters and by the method of calculating the module and phase of the reflectometry signal using the Gd reference layer. The results obtained with different methods are compared with each other. To clarify the structural and magnetic characteristics, the Levenberg-Marquardt algorithm was applied in both cases. The obtained data on the magnetic structure is in agreement with the theoretical model of magnetization of a layered antiferromagnet of finite dimensions in a weak field. The presented modification of the reference layer method can be considered as the phase problem solution in polarized neutron reflectometry.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: The research was carried out within the state assignment of Ministry of Science and Higher
  Education of the Russian Federation (theme “Spin” N 22021000036-3), neutronographic experiments was
  carried out with the financial support of the Ministry of Science and Higher Education of the Russian
  Federation, Agreement N 075-15-2022-830 dated May 27, 2022 (continuation of Agreement N 075-15-2021-
  1358 dated October 12, 2021).
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: ru
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Vestnik of St Petersburg University. Applied Mathematics. Computer Science. Control Processes;Volume 18; Issue 4
metadata.lang: -
metadata.name: dc.subject
metadata.value: polarized neutron reflectometry
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: phase-amplitude function method
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Runge — Kutta method
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: complex reflection coefficient
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: multilayer nanoheterostructures
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: phase problem
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: non-collinear magnetic ordering
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: reference layer
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Levenberg — Marquardt algorithm
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Recovering complex reflection coefficient using the reference layer algorithm for multilayer systems with non-collinear magnetic ordering
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 15541-Текст статьи-52323-1-10-20230310.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/39315/1/15541-%d0%a2%d0%b5%d0%ba%d1%81%d1%82%20%d1%81%d1%82%d0%b0%d1%82%d1%8c%d0%b8-52323-1-10-20230310.pdf
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