Abstract
The RM3 compounds crystallize in the rhombohedral PuNi3 type structure (1). There are two non-equivalent R.E. sites, R-I- (3a) and RII (6c), and three M sites, 3a, 6c, and 18h. Previous studies give evidence of complex magnetic structures for the Er compounds; at 4.2K ErNi3 has a noncollinear magnetic structure (2) while ErCo3 and ErFe3 have collinear \(\vec c\) axis structures (3,4). At 42K the latter compound exhibits a spin reorientation. The effect of temperature and applied magnetic fields on the magnetic structures of these compounds has not been investigated. Accordingly, we have undertaken a comparative study using single crystal magnetization measurements and powder neutron diffraction experiments.
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