Unusual magnetic properties of Ho(Fe0.6Mn0.4)12

Abstract The magnetic properties of Ho(Fe 0.6 Mn 0.4 ) 12 were studied by X-ray diffraction and magnetic measurements. The X-ray diffraction pattern shows that the compound is of single phase and has the ThMn 12 tetragonal structure. Magnetic measurements show that the Curie temperature is 204 K. The magnetization curve crosses zero at 98 K and exhibits a negative value below the compensation point. The hystersis loops at different temperatures have been measured; the magnetization curves show complicated magnetic properties in a strong external field.