Erbium neutron scattering

Though a simultaneous ordering of both nickel and erbium magnetic moments in Er2BaNi05 at TN 34 K follows unambiguously from neutron scattering [9, 7] and spectroscopic [6] data, the magnetic susceptibility does not show any peculiarity at TN but demonstrates a sharp maximum at a considerably lower temperature Tm=15 K (see, e.g., [8]). 

The neutron scattering observation of (long-range) magnetic incommensurability and the p.SR observation of local magnetic commensuration are reconcilable in a spin-slip model, as has been developed for the magnetic ordering of holmium and erbium (see, for... 

The magnetic term in the heat capacity is what would be expected from the ferromagnetic spiral (i.e. the cone) structure of erbium (Kaplan 1961) and has been supported by the discovery of a linear spin-wave dispersion law along the c-axis in neutron scattering experiments (Nicklow et al. 1971). 

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