The determination of the magnetic structure of DyCrO4 by neutron diffraction

At room temperature DyCrO₄ has the tetragonal zircon structure. Susceptibility measurements show that DyCrO₄ is ferromagnetic below 23 K. Neutron diffraction from a powder sample yield the magnetic structure. Using a computer program, which was developed for the determination of non-collinear and spiral structures, several models allowed by symmetry were compared with the experiment. It turns out that the Dy-moments and the Cr-moments as well order parallel in the a-b-plane. For the Dy-moment a value of 12μ_B and for the ratio of the Cr- to the Dy-moment a value of $\text{1}\text{10}$ was found.