The structure and magnetic properties of FeAl1-xRhx alloys have been s
tudied by X-ray, magnetization and Mossbauer effect measurements. The
crystal structure of these alloys remains in B2 type. However, the sol
ubility limits are rather narrow for both sides. On the Al-rich side,
Rh atoms occupy the Fe site and a part of Fe atoms become magnetic. Th
ey freeze into a spin-glass state at low temperatures. On the Rh-rich
side, Al atoms occupy the Fe site. The Al substitution stabilizes ferr
omagnetism, i.e., the Curie temperature increases and the antiferromag
netic to ferromagnetic transition temperature decreases.