Magnetization of the Rare-Earth Manganese Compounds R6Mn23

Abstract

Measurements have been made of the magnetic moments of compounds of the type R₆Mn₂₃, where R is a rare‐earth ion. Determination of the saturation moments of Mn with nine of the rare earths (Sm, Nd, Gd, Tb, Dy, Ho, Er, Tm, and Lu) show that, with one exception, the rare‐earth and manganese moments are antiparallel; only in the gadolinium manganese compound is there complete ferromagnetic coupling. From the moment of Lu₆Mn₂₃ one derives the moment of 0.4μ_B per manganese atom. The measured moments of the other compounds agree closely with those calculated assuming a moment of 0.4μ_B for Mn and the normal moment of _gJ for the appropriate rare‐earth atom.