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Small-angle neutron scattering; polarised neutrons; magnetic agglomerates

Using a right-angled magnetic air prism, we have achieved a separation of ∼10 arcsec between ∼2 arcsec wide up and down-spin peaks of 5.4 Å neutrons. The polarised neutron option has thus been introduced into the SUSANS instrument. Strongly spindependent SUSANS spectra have been observed over ±1.3 × 10⁻⁴ Å⁻¹ range for several magnetic alloy samples. Spatial pair-distribution functions for the up and down-spins as well as the nuclear and magnetic scattering length density distributions in the micrometer domain, have been deduced from these spectra.

Apoorva G Wagh¹ Veer Chand Rakhecha¹ Markus Strobl² Wolfgang Treimer²

1. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India
2. Berlin Neutron Scattering Center, Hahn-Meitner-Institut, Glienicker Strasse 100, Berlin - 14109, Germany

Published

August 2004