Reflective, polarizing, and magnetically soft amorphous neutron optics with 11B-enriched B4C.
Sci Adv
; 10(7): eadl0402, 2024 Feb 16.
Article
em En
| MEDLINE
| ID: mdl-38354253
ABSTRACT
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 11B4C 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.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
Sci Adv
Ano de publicação:
2024
Tipo de documento:
Article
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Suécia