Magnetic coupling in amorphous Fe80−xRxB12Si8(R=Er, Gd) alloys

Abstract
We have prepared amorphous Fe‐Er‐B‐Si and Fe‐Gd‐B‐Si alloys and magnetization studies in fields up to 35 T at 4.2 K have been carried out on some selected samples. The results have been analyzed on the existing model proposed by Verhoef et al. for crystalline Fe and Co compounds with rare earths. The magnetic moments of Fe, Er, and Gd, as well as other parameters such as the intersublattice molecular‐field coefficient (nRT), the strength of the exchange interaction etc., have been determined.