Magnetic Study on Mn₄N and its Related Compounds

抄録

In order to obtain some informations on the electronic structure of Mn₄N, the magnetic properties of Mn₄N compounds, partially substituted by In and Sn respectively, are studied by a newly devised magnetic torsion balance. These compounds show very complicated temperature- and composition-dependences of saturation magnetization and have the magnetic susceptibilities nearly independent of temperature at far above the Curie temperatures. Moreover, the composition dependence of the magnetic moment varies remarkably with the species of substituent metals. These facts may be explained in terms of an intuitive band scheme which leads to the variation of the magnetic moment on each sublattice with temperature. The band scheme of γ-Mn is also discussed in connection with that of Mn₄N.