Ferro- and Antiferromagnetism in (Mn_1-xCr_x)₃B₄

Abstract

Magnetic studies were made on the compound (Mn 1-x Cr x ) 3 B 4 , x ranging from 0 to 0.5. In the composition range 0≤x≤1/3, antiferromagnetic phase of Mn 3 B 4 and ferromagnetic phase of Mn 2 CrB 4 were found to be stable, and these two phases seemed to coexist for the intermediate compositions. A rotational hysteresis was observed with the specimen for which x=0.05. This was attributed to the exchange interaction at the boundaries of these phases.