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Intensity map in the (00l) plane from Q-scans around the (022) reciprocal point at Ti-0.8K. The hatched elipsoids (labelled 1-6) correspond to the section of the satellite peaks at half their intensity; the central one (B), corresponding to the Bragg peak, roughly gives the experimental resolution. The lines a, b, c show the scan directions used to check for higher order components.
Another good example is given by the Kondo compound TmS. Single crystal neutron diffraction experiments have revealed a modulated antiferromagnetic structure below the Néel temperature TN=5.2K. At 1.5K the propagation vector q is (½-n, ½+n, ½), with n=0.075 (Figure below). In the simplest assumption, where no coupling does exist between the different Fourier components, the magnetic structure can be described as an amplitude modulation of the magnetization propagating along the [110] direction. The magnetic moments are aligned along [112] directions and (111) planes are antiferromagnetically coupled.
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Single crystal neutron diffraction by the Kondo compound TmS. A modulated antiferromagnetic structure below the Néel temperature TN=5.2K was observed.