%0 Journal Article
%T Magnetic Field Effects on Neutron Diffraction in the Antiferromagnetic Phase of $UPt_3$
%A Juana Moreno
%A J. A. Sauls
%J Physics
%D 2000
%I arXiv
%R 10.1103/PhysRevB.63.024419
%X We discuss possible magnetic structures in UPt$_3$ based on our analysis of elastic neutron-scattering experiments in high magnetic fields at temperatures $T<T_N$. The existing experimental data can be explained by a single-{\bf q} antiferromagnetic structure with three independent domains. For modest in-plane spin-orbit interactions, the Zeeman coupling between the antiferromagnetic order parameter and the magnetic field induces a rotation of the magnetic moments, but not an adjustment of the propagation vector of the magnetic order. A triple-{\bf q} magnetic structure is also consistent with neutron experiments, but in general leads to a non-uniform magnetization in the crystal. New experiments could decide between these structures.
%U http://arxiv.org/abs/cond-mat/0004253v1