An evaluation of the R—T spin coupling parameter in the rare earth–transition metal intermetallics

For the purpose of the evaluation of the R—T spin coupling parameter, ART, an analysis of the Curie temperature is made for the rare earth—transition metal systems RmTn (R rare earth T = Fe, Co; m/n = 1/2, 1/3, 6/23, and 2/17) and some systems of recent and growing interest, such as R2T14B, RT11Ti, RT10V2 and their ternaries Rm(Co, Fe)n. Besides the enhancement of ART in the light rare earth compounds, the dependence of ART on the magnetic moment of the 3d electrons is presented.