Antiferromagnetic component

Cr3Te4 is ferromagnetic below Of = 329° K (186), but below 80° K an antiferromagnetic component seems to be superimposed. The ferrimagnetism found in Fe3Se4 (187) also does not simply result from an antiparallel coupling of (001) layers. 

A careful study of the anisotropy of these crystals has shown no additional anisotropy beyond that associated with the molecular diamagnetism. We conlude that there is no antiferromagnetic component to the phase transition, or, if so, that the flop field is lower than the lowest fields used in these measurements. 

In the case of DyAl2 (Nereson et al., 1968), at low temperatures, some very weak magnetic superlattice lines were observed leading to the possibility of a very small antiferromagnetic component. The data are all consistent with no magnetic moment developing on the Al sites. 

Fig. 14.100. Magnetic structures in the system Th(Fe,Co)5. The ferromagnetic and antiferromagnetic components perpendicular to the c-axis are arbitrarily drawn normal to and in the plane of the paper, respectively. The normal component is indicated by a + sign (Elemans and Buschow, 1974).

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