Hall effect in rare-earth–transition-metal amorphous alloy films

Abstract
The Hall effect in amorphous RE‐TM (RE=Gd, Tb, Dy; TM=Fe, Ni) films with a perpendicular magnetization easy axis was measured. It was found that amorphous RE‐Fe films exhibited a remarkable extraordinary Hall effect as observed previously for Gd‐Co sputtered films, and that the observed Hall effect behavior depended much less on the RE element. It was also found that the Hall voltage in Gd‐Ni films was two orders of magnitude smaller than that in RE‐Fe films. These observations suggest that the TM plays a dominant role in the anomalous Hall voltage in RE‐TM alloy systems.