Figure 1

NC spin states in cubic CoV₂O₄ compared to tetragonal MnV₂O₄. Temperature dependence of the (111) (triangles), (220) (circles), and (002) (squares) Bragg peak intensities for CoV₂O₄ (a) and MnV₂O₄ (b) measured by neutron diffraction at HB-3A. The peak intensities of (111) and (220) above the magnetic transition temperature are fully from the nuclear structure and were subtracted. The (002) peak is not allowed from the structural symmetry and fully originated from the magnetic scattering. The background was subtracted. All the magnetic peaks observed by our neutron diffraction are instrument resolution limited besides the peak broadening caused by the structural transition for MnV₂O₄, and thus indicate the long range ordered magnetic moments. The strongly-reduced intensity of (002) peak in CoV₂O₄ indicates that only tiny amount of V spin orders, which is caused by enhanced itinerancy.