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Polarized neutron reflectometer: A new instrument to measure magnetic depth profiles

G. P. Felcher, R. O. Hilleke, R. K. Crawford, J. Haumann, R. Kleb, and G. Ostrowski

Argonne National Laboratory, Argonne, Illinois 60439

(Received 16 October 1986; accepted 12 December 1986)

A description is given of the prototype polarized neutron reflectometer installed at the intense pulsed neutron source. This instrument is designed for determining the magnetic depth profiles near the surfaces of ferromagnets and superconductors, by measuring the spin-dependent reflectivities of a well-collimated (0.01°) beam of cold neutrons from surfaces of a few cm². Magnetic profiles can be determined with the spatial resolution of 40 Å, over thicknesses up to 5000 Å. Variations of the magnetic flux of the order of 10^–5 G cm² can be detected. Review of Scientific Instruments is copyrighted by The American Institute of Physics.

doi:10.1063/1.1139225
PACS: 07.55.+x, 61.12.Gz        Additional Information

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