Polarized neutron diffraction

Magnetic structure of greigite (Fe3S4) probed by neutron powder diffraction and polarized neutron diffraction

[1] We have investigated greigite (Fe3S4) using a combination of neutron powder diffraction and polarized neutron diffraction to give the first unambiguous assignment of its magnetic structure. Our results confirm that greigite has a collinear ferrimagnetic structure with antiferromagnetic coupling between the tetrahedral (A) and octahedral (B) sites. Our analysis also indicates that greigite d...

Polarized Neutron Scattering

Neutron Diffraction Experiments

This ISEN award supported research toward improving the energy efficiency of actuators. The focused research objective was to develop next-generation shape memory alloy (SMA) models and structures, to demonstrate this new technology in targeted near-term applications on airplanes. Two research avenues were pursued to enable development of this new technology: 1) neutron diffraction experiments ...

Biological Neutron Diffraction

Observation of chirality domains in terbium by polarized neutron diffraction topography

2014 We have carried out the first observation of spiral spin or chirality domains, in a single crystal of terbium in its helimagnetic phase, by polarized neutron diffraction topography. The different domain structures observed are a function of the thermal history of the sample. When the sample is warmed from the ferromagnetic phase one observes stripe domains with long axis perpendicular to t...