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Reflective, polarizing, and magnetically soft amorphous neutron optics with 11B-enriched B4C
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-5327-609X
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-5828-5796
Univ Iceland, Iceland.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
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2024 (English)In: Science Advances, E-ISSN 2375-2548, Vol. 10, no 7, article id eadl0402Article in journal (Refereed) Published
Abstract [en]

The utilization of polarized neutrons is of great importance in scientific disciplines spanning materials science, physics, biology, and chemistry. However, state-of-the-art multilayer polarizing neutron optics have limitations, particularly low specular reflectivity and polarization at higher scattering vectors/angles, and the requirement of high external magnetic fields to saturate the polarizer magnetization. Here, we show that, by incorporating (B4C)-B-11 into Fe/Si multilayers, amorphization and smooth interfaces can be achieved, yielding higher neutron reflectivity, less diffuse scattering, and higher polarization. Magnetic coercivity is eliminated, and magnetic saturation can be reached at low external fields (>2 militesla). This approach offers prospects for substantial improvement in polarizing neutron optics with nonintrusive positioning of the polarizer, enhanced flux, increased data accuracy, and further polarizing/analyzing methods at neutron scattering facilities.

Place, publisher, year, edition, pages
AMER ASSOC ADVANCEMENT SCIENCE , 2024. Vol. 10, no 7, article id eadl0402
National Category
Atom and Molecular Physics and Optics
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URN: urn:nbn:se:liu:diva-203132DOI: 10.1126/sciadv.adl0402ISI: 001189022400009PubMedID: 38354253OAI: oai:DiVA.org:liu-203132DiVA, id: diva2:1855256
Note

Funding Agencies|Swedish Research Council (VR) [2019-04837_VR, 2018-05190_VR, 2021-03826]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoeping University, Faculty Grant SFO-Mat-LiU [2009 00971]; Hans Werthens grant [2022-D-03]; Royal Academy of Sciences Physics [PH2022-0029]; Knut and Alice Wallenberg Foundation [KAW-2020.0196]; Icelandic Research Fund [217843-053]; Swedish Foundation for Strategic Research [RIF14-0053]

Available from: 2024-04-30 Created: 2024-04-30 Last updated: 2024-04-30

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