Magnetic and structural properties are presented for new ferromagnetic compounds of the form ${\mathrm{Rh}}_2\mathrm{Mn}X$ where $X$ is Al, Ga, In, Tl, Sn, Pb, and Sb. The exchange is described in terms of competing ferromagnetic Mn-Rh-Mn interactions and antiferromagnetic Mn-Mn interactions.

• Received 14 June 1976

DOI:https://doi.org/10.1103/PhysRevB.14.4131